---
_id: '25960'
abstract:
- lang: eng
text: We report on sensing properties of ordered mesoporous nanostructures of In2O3
synthesized by nanocasting procedure towards NO2. The nanostructured material
shows improved recover times and higher responses compared to non nanostructured
material at low operating temperatures (100–150°C) thus allowing the use for low
power NO2 sensors. These properties may be related to fast oxygen in and out propagation
facilitated by an enhanced surface accessibility of the nanostructure.
author:
- first_name: Nicola
full_name: Donato, Nicola
last_name: Donato
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Claus-Dieter
full_name: Kohl, Claus-Dieter
last_name: Kohl
- first_name: Mariangela
full_name: Latino, Mariangela
last_name: Latino
- first_name: Giovanni
full_name: Neri, Giovanni
last_name: Neri
- first_name: Donatella
full_name: Spadaro, Donatella
last_name: Spadaro
- first_name: Cesare
full_name: Malagù, Cesare
last_name: Malagù
citation:
ama: 'Donato N, Wagner T, Tiemann M, et al. NO2 Sensors with Reduced Power Consumption
Based on Mesoporous Indium Oxide. In: Lecture Notes in Electrical Engineering.
; 2012. doi:10.1007/978-1-4614-0935-9_10'
apa: Donato, N., Wagner, T., Tiemann, M., Waitz, T., Kohl, C.-D., Latino, M., Neri,
G., Spadaro, D., & Malagù, C. (2012). NO2 Sensors with Reduced Power Consumption
Based on Mesoporous Indium Oxide. In Lecture Notes in Electrical Engineering.
https://doi.org/10.1007/978-1-4614-0935-9_10
bibtex: '@inbook{Donato_Wagner_Tiemann_Waitz_Kohl_Latino_Neri_Spadaro_Malagù_2012,
place={Boston, MA}, title={NO2 Sensors with Reduced Power Consumption Based on
Mesoporous Indium Oxide}, DOI={10.1007/978-1-4614-0935-9_10},
booktitle={Lecture Notes in Electrical Engineering}, author={Donato, Nicola and
Wagner, Thorsten and Tiemann, Michael and Waitz, Thomas and Kohl, Claus-Dieter
and Latino, Mariangela and Neri, Giovanni and Spadaro, Donatella and Malagù, Cesare},
year={2012} }'
chicago: Donato, Nicola, Thorsten Wagner, Michael Tiemann, Thomas Waitz, Claus-Dieter
Kohl, Mariangela Latino, Giovanni Neri, Donatella Spadaro, and Cesare Malagù.
“NO2 Sensors with Reduced Power Consumption Based on Mesoporous Indium Oxide.”
In Lecture Notes in Electrical Engineering. Boston, MA, 2012. https://doi.org/10.1007/978-1-4614-0935-9_10.
ieee: N. Donato et al., “NO2 Sensors with Reduced Power Consumption Based
on Mesoporous Indium Oxide,” in Lecture Notes in Electrical Engineering,
Boston, MA, 2012.
mla: Donato, Nicola, et al. “NO2 Sensors with Reduced Power Consumption Based on
Mesoporous Indium Oxide.” Lecture Notes in Electrical Engineering, 2012,
doi:10.1007/978-1-4614-0935-9_10.
short: 'N. Donato, T. Wagner, M. Tiemann, T. Waitz, C.-D. Kohl, M. Latino, G. Neri,
D. Spadaro, C. Malagù, in: Lecture Notes in Electrical Engineering, Boston, MA,
2012.'
date_created: 2021-10-09T04:52:32Z
date_updated: 2023-03-08T10:36:49Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1007/978-1-4614-0935-9_10
language:
- iso: eng
place: Boston, MA
publication: Lecture Notes in Electrical Engineering
publication_identifier:
issn:
- 1876-1100
- 1876-1119
publication_status: published
quality_controlled: '1'
status: public
title: NO2 Sensors with Reduced Power Consumption Based on Mesoporous Indium Oxide
type: book_chapter
user_id: '23547'
year: '2012'
...
---
_id: '25956'
abstract:
- lang: eng
text: A model is proposed for the drop in electronic resistance of n-type semiconducting
indium oxide (In2O3) upon illumination with light (350 nm, 3.5 eV) as well as
for the (light-enhanced) sensitivity of In2O3 to oxidizing gases. Essential features
of the model are photoreduction and a rate-limiting oxygen-diffusion step. Ordered,
mesoporous In2O3 with a high specific surface area serves as a versatile system
for experimental studies. Analytical techniques comprise conductivity measurements
under a controlled atmosphere (synthetic air, pure N2) and temperature-resolved
in-situ Fourier transform infrared (FTIR) spectroscopy. IR measurements reveal
that oxygen vacancies form a donor level 0.18 eV below the conduction band.
article_type: original
author:
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Claus-Dieter
full_name: Kohl, Claus-Dieter
last_name: Kohl
- first_name: Sara
full_name: Morandi, Sara
last_name: Morandi
- first_name: Cesare
full_name: Malagù, Cesare
last_name: Malagù
- first_name: Nicola
full_name: Donato, Nicola
last_name: Donato
- first_name: Mariangela
full_name: Latino, Mariangela
last_name: Latino
- first_name: Giovanni
full_name: Neri, Giovanni
last_name: Neri
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Wagner T, Kohl C-D, Morandi S, et al. Photoreduction of Mesoporous In2O3:
Mechanistic Model and Utility in Gas Sensing. Chemistry - A European Journal.
Published online 2012:8216-8223. doi:10.1002/chem.201103905'
apa: 'Wagner, T., Kohl, C.-D., Morandi, S., Malagù, C., Donato, N., Latino, M.,
Neri, G., & Tiemann, M. (2012). Photoreduction of Mesoporous In2O3: Mechanistic
Model and Utility in Gas Sensing. Chemistry - A European Journal, 8216–8223.
https://doi.org/10.1002/chem.201103905'
bibtex: '@article{Wagner_Kohl_Morandi_Malagù_Donato_Latino_Neri_Tiemann_2012, title={Photoreduction
of Mesoporous In2O3: Mechanistic Model and Utility in Gas Sensing}, DOI={10.1002/chem.201103905},
journal={Chemistry - A European Journal}, author={Wagner, Thorsten and Kohl, Claus-Dieter
and Morandi, Sara and Malagù, Cesare and Donato, Nicola and Latino, Mariangela
and Neri, Giovanni and Tiemann, Michael}, year={2012}, pages={8216–8223} }'
chicago: 'Wagner, Thorsten, Claus-Dieter Kohl, Sara Morandi, Cesare Malagù, Nicola
Donato, Mariangela Latino, Giovanni Neri, and Michael Tiemann. “Photoreduction
of Mesoporous In2O3: Mechanistic Model and Utility in Gas Sensing.” Chemistry
- A European Journal, 2012, 8216–23. https://doi.org/10.1002/chem.201103905.'
ieee: 'T. Wagner et al., “Photoreduction of Mesoporous In2O3: Mechanistic
Model and Utility in Gas Sensing,” Chemistry - A European Journal, pp.
8216–8223, 2012, doi: 10.1002/chem.201103905.'
mla: 'Wagner, Thorsten, et al. “Photoreduction of Mesoporous In2O3: Mechanistic
Model and Utility in Gas Sensing.” Chemistry - A European Journal, 2012,
pp. 8216–23, doi:10.1002/chem.201103905.'
short: T. Wagner, C.-D. Kohl, S. Morandi, C. Malagù, N. Donato, M. Latino, G. Neri,
M. Tiemann, Chemistry - A European Journal (2012) 8216–8223.
date_created: 2021-10-09T04:45:45Z
date_updated: 2023-03-08T10:35:21Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/chem.201103905
language:
- iso: eng
page: 8216-8223
publication: Chemistry - A European Journal
publication_identifier:
issn:
- 0947-6539
publication_status: published
quality_controlled: '1'
status: public
title: 'Photoreduction of Mesoporous In2O3: Mechanistic Model and Utility in Gas Sensing'
type: journal_article
user_id: '23547'
year: '2012'
...
---
_id: '25957'
abstract:
- lang: eng
text: Poröse Funktionsmaterialien wie halbleitende Metalloxide, Kohlenstoff-Formen
oder auch Silica werden aktuell von verschiedenen Wissenschaftsdisziplinen intensiv
für Bereiche der Energiespeicherung, Sensorik, Katalyse und Stofftrennung erforscht.
Im Beitrag werden schwerpunktmäßig geordnet-mesoporöse Silica-Materialien behandelt,
die seit etwa 20 Jahren synthetisch zugänglich sind. Neben den Grundlagen der
Herstellung über ein Templat-Verfahren werden im Beitrag auch drei Experimente
vorgestellt, die im Chemieunterricht oder Schülerlabor durchgeführt werden können.
Zudem wird gezeigt, dass sich verschiedene Aspekte aus dem Kompetenzbereich Fachwissen
mit Hilfe des Themas „Mesoporöse Silica“ miteinander vernetzen lassen.
article_type: original
author:
- first_name: Timm
full_name: Wilke, Timm
last_name: Wilke
- first_name: Stefanie
full_name: Haffer, Stefanie
last_name: Haffer
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
citation:
ama: Wilke T, Haffer S, Tiemann M, Waitz T. Mesoporöse Silica - Moderne Funktionsmaterialien
im Chemieunterricht. CHEMKON. Published online 2012:67-72. doi:10.1002/ckon.201210170
apa: Wilke, T., Haffer, S., Tiemann, M., & Waitz, T. (2012). Mesoporöse Silica
- Moderne Funktionsmaterialien im Chemieunterricht. CHEMKON, 67–72. https://doi.org/10.1002/ckon.201210170
bibtex: '@article{Wilke_Haffer_Tiemann_Waitz_2012, title={Mesoporöse Silica - Moderne
Funktionsmaterialien im Chemieunterricht}, DOI={10.1002/ckon.201210170},
journal={CHEMKON}, author={Wilke, Timm and Haffer, Stefanie and Tiemann, Michael
and Waitz, Thomas}, year={2012}, pages={67–72} }'
chicago: Wilke, Timm, Stefanie Haffer, Michael Tiemann, and Thomas Waitz. “Mesoporöse
Silica - Moderne Funktionsmaterialien Im Chemieunterricht.” CHEMKON, 2012,
67–72. https://doi.org/10.1002/ckon.201210170.
ieee: 'T. Wilke, S. Haffer, M. Tiemann, and T. Waitz, “Mesoporöse Silica - Moderne
Funktionsmaterialien im Chemieunterricht,” CHEMKON, pp. 67–72, 2012, doi:
10.1002/ckon.201210170.'
mla: Wilke, Timm, et al. “Mesoporöse Silica - Moderne Funktionsmaterialien Im Chemieunterricht.”
CHEMKON, 2012, pp. 67–72, doi:10.1002/ckon.201210170.
short: T. Wilke, S. Haffer, M. Tiemann, T. Waitz, CHEMKON (2012) 67–72.
date_created: 2021-10-09T04:46:42Z
date_updated: 2023-03-08T10:36:17Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/ckon.201210170
language:
- iso: eng
page: 67-72
publication: CHEMKON
publication_identifier:
issn:
- 0944-5846
publication_status: published
quality_controlled: '1'
status: public
title: Mesoporöse Silica - Moderne Funktionsmaterialien im Chemieunterricht
type: journal_article
user_id: '23547'
year: '2012'
...
---
_id: '25955'
abstract:
- lang: eng
text: Crystalline, mesoporous alumina (Al2O3) materials with specific surface areas
up to 400 m2 g–1 have been synthesized by means of structure replication (nanocasting)
using CMK-8 carbon as a structure matrix. A crucial step during this synthesis
procedure is the conversion of aluminum nitrate into aluminum hydroxide by treatment
with ammonia vapor. The impact of this step was investigated in some detail. Prolonged
vapor treatment has a positive impact on the crystallinity of the final Al2O3
products but at the same time leads to loss of mesoscopic structural order and
porosity.
article_type: original
author:
- first_name: Stefanie
full_name: Haffer, Stefanie
last_name: Haffer
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Haffer S, Weinberger C, Tiemann M. Mesoporous Al2O3 by Nanocasting: Relationship
between Crystallinity and Mesoscopic Order. European Journal of Inorganic Chemistry.
Published online 2012:3283-3288. doi:10.1002/ejic.201200131'
apa: 'Haffer, S., Weinberger, C., & Tiemann, M. (2012). Mesoporous Al2O3 by
Nanocasting: Relationship between Crystallinity and Mesoscopic Order. European
Journal of Inorganic Chemistry, 3283–3288. https://doi.org/10.1002/ejic.201200131'
bibtex: '@article{Haffer_Weinberger_Tiemann_2012, title={Mesoporous Al2O3 by Nanocasting:
Relationship between Crystallinity and Mesoscopic Order}, DOI={10.1002/ejic.201200131},
journal={European Journal of Inorganic Chemistry}, author={Haffer, Stefanie and
Weinberger, Christian and Tiemann, Michael}, year={2012}, pages={3283–3288} }'
chicago: 'Haffer, Stefanie, Christian Weinberger, and Michael Tiemann. “Mesoporous
Al2O3 by Nanocasting: Relationship between Crystallinity and Mesoscopic Order.”
European Journal of Inorganic Chemistry, 2012, 3283–88. https://doi.org/10.1002/ejic.201200131.'
ieee: 'S. Haffer, C. Weinberger, and M. Tiemann, “Mesoporous Al2O3 by Nanocasting:
Relationship between Crystallinity and Mesoscopic Order,” European Journal
of Inorganic Chemistry, pp. 3283–3288, 2012, doi: 10.1002/ejic.201200131.'
mla: 'Haffer, Stefanie, et al. “Mesoporous Al2O3 by Nanocasting: Relationship between
Crystallinity and Mesoscopic Order.” European Journal of Inorganic Chemistry,
2012, pp. 3283–88, doi:10.1002/ejic.201200131.'
short: S. Haffer, C. Weinberger, M. Tiemann, European Journal of Inorganic Chemistry
(2012) 3283–3288.
date_created: 2021-10-09T04:44:45Z
date_updated: 2023-03-08T10:35:53Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/ejic.201200131
language:
- iso: eng
page: 3283-3288
publication: European Journal of Inorganic Chemistry
publication_identifier:
issn:
- 1434-1948
publication_status: published
quality_controlled: '1'
status: public
title: 'Mesoporous Al2O3 by Nanocasting: Relationship between Crystallinity and Mesoscopic
Order'
type: journal_article
user_id: '23547'
year: '2012'
...
---
_id: '25965'
abstract:
- lang: eng
text: Nanoporous ZnO powders with high surface-to-mass ratios (SMR) between 15 and
70 m2 g−1 are synthesized, structurally characterized, and studied by time-resolved
photoluminescence (PL). A strong dependence of the recombination dynamics and
spectral width on SMR is observed at T = 10 K, and pronounced disorder-induced
effects are found in the temperature dependence. Both the thermally induced shift
of the PL maximum and the spectrally integrated PL intensity are interpreted by
appropriate theoretical models. This consistent quantitative analysis of the experimental
data yields a characteristic energy of 15 meV for the disorder scale in the nanoporous
ZnO sample with an intermediate SMR.
article_type: original
author:
- first_name: Alexej
full_name: Chernikov, Alexej
last_name: Chernikov
- first_name: Swantje
full_name: Horst, Swantje
last_name: Horst
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Sangam
full_name: Chatterjee, Sangam
last_name: Chatterjee
citation:
ama: Chernikov A, Horst S, Waitz T, Tiemann M, Chatterjee S. Photoluminescence Properties
of Ordered Mesoporous ZnO. The Journal of Physical Chemistry C. Published
online 2011:1375-1379. doi:10.1021/jp104293e
apa: Chernikov, A., Horst, S., Waitz, T., Tiemann, M., & Chatterjee, S. (2011).
Photoluminescence Properties of Ordered Mesoporous ZnO. The Journal of Physical
Chemistry C, 1375–1379. https://doi.org/10.1021/jp104293e
bibtex: '@article{Chernikov_Horst_Waitz_Tiemann_Chatterjee_2011, title={Photoluminescence
Properties of Ordered Mesoporous ZnO}, DOI={10.1021/jp104293e},
journal={The Journal of Physical Chemistry C}, author={Chernikov, Alexej and Horst,
Swantje and Waitz, Thomas and Tiemann, Michael and Chatterjee, Sangam}, year={2011},
pages={1375–1379} }'
chicago: Chernikov, Alexej, Swantje Horst, Thomas Waitz, Michael Tiemann, and Sangam
Chatterjee. “Photoluminescence Properties of Ordered Mesoporous ZnO.” The Journal
of Physical Chemistry C, 2011, 1375–79. https://doi.org/10.1021/jp104293e.
ieee: 'A. Chernikov, S. Horst, T. Waitz, M. Tiemann, and S. Chatterjee, “Photoluminescence
Properties of Ordered Mesoporous ZnO,” The Journal of Physical Chemistry C,
pp. 1375–1379, 2011, doi: 10.1021/jp104293e.'
mla: Chernikov, Alexej, et al. “Photoluminescence Properties of Ordered Mesoporous
ZnO.” The Journal of Physical Chemistry C, 2011, pp. 1375–79, doi:10.1021/jp104293e.
short: A. Chernikov, S. Horst, T. Waitz, M. Tiemann, S. Chatterjee, The Journal
of Physical Chemistry C (2011) 1375–1379.
date_created: 2021-10-09T05:02:31Z
date_updated: 2023-03-09T08:31:28Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/jp104293e
language:
- iso: eng
page: 1375-1379
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
quality_controlled: '1'
status: public
title: Photoluminescence Properties of Ordered Mesoporous ZnO
type: journal_article
user_id: '23547'
year: '2011'
...
---
_id: '25962'
abstract:
- lang: eng
text: We report the correlation of the aging of Pd-doped SnO2 methane sensors with
the change of the oxidation state of Pd. Mesoporous SnO2 doped with palladium
species was prepared and exposed to different gas mixtures at high temperature
(600 °C) to simulate long term usage. After each exposure step a fraction of the
sample was cooled down to “freeze” the current oxidation state of Pd which was
then analyzed by X-ray Absorption Near-Edge Spectroscopy (XANES) using the 'white
line' (i.e. the absorption peak corresponding to the transition from the 2p3/2
core level to unoccupied 4 d states) intensity of the L(III) edge as a probe for
the oxidation state. The Pd oxidation state correlates with the response of the
resistive SnO2 sensor to methane gas, as determined by measuring the gas response
to different concentrations of methane. Samples treated with 5000 ppm methane
in air show a significant reduction of Pd(II) to Pd(0), depending clearly on the
carrier gas (synthetic air, pure nitrogen) and on the temperature (600 °C vs.
300 °C).
article_type: original
author:
- first_name: T.
full_name: Wagner, T.
last_name: Wagner
- first_name: M.
full_name: Bauer, M.
last_name: Bauer
- first_name: T.
full_name: Sauerwald, T.
last_name: Sauerwald
- first_name: C.-D.
full_name: Kohl, C.-D.
last_name: Kohl
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Wagner T, Bauer M, Sauerwald T, Kohl C-D, Tiemann M. X-ray absorption near-edge
spectroscopy investigation of the oxidation state of Pd species in nanoporous
SnO2 gas sensors for methane detection. Thin Solid Films. Published online
2011:909-912. doi:10.1016/j.tsf.2011.04.187
apa: Wagner, T., Bauer, M., Sauerwald, T., Kohl, C.-D., & Tiemann, M. (2011).
X-ray absorption near-edge spectroscopy investigation of the oxidation state of
Pd species in nanoporous SnO2 gas sensors for methane detection. Thin Solid
Films, 909–912. https://doi.org/10.1016/j.tsf.2011.04.187
bibtex: '@article{Wagner_Bauer_Sauerwald_Kohl_Tiemann_2011, title={X-ray absorption
near-edge spectroscopy investigation of the oxidation state of Pd species in nanoporous
SnO2 gas sensors for methane detection}, DOI={10.1016/j.tsf.2011.04.187},
journal={Thin Solid Films}, author={Wagner, T. and Bauer, M. and Sauerwald, T.
and Kohl, C.-D. and Tiemann, Michael}, year={2011}, pages={909–912} }'
chicago: Wagner, T., M. Bauer, T. Sauerwald, C.-D. Kohl, and Michael Tiemann. “X-Ray
Absorption near-Edge Spectroscopy Investigation of the Oxidation State of Pd Species
in Nanoporous SnO2 Gas Sensors for Methane Detection.” Thin Solid Films,
2011, 909–12. https://doi.org/10.1016/j.tsf.2011.04.187.
ieee: 'T. Wagner, M. Bauer, T. Sauerwald, C.-D. Kohl, and M. Tiemann, “X-ray absorption
near-edge spectroscopy investigation of the oxidation state of Pd species in nanoporous
SnO2 gas sensors for methane detection,” Thin Solid Films, pp. 909–912,
2011, doi: 10.1016/j.tsf.2011.04.187.'
mla: Wagner, T., et al. “X-Ray Absorption near-Edge Spectroscopy Investigation of
the Oxidation State of Pd Species in Nanoporous SnO2 Gas Sensors for Methane Detection.”
Thin Solid Films, 2011, pp. 909–12, doi:10.1016/j.tsf.2011.04.187.
short: T. Wagner, M. Bauer, T. Sauerwald, C.-D. Kohl, M. Tiemann, Thin Solid Films
(2011) 909–912.
date_created: 2021-10-09T04:59:31Z
date_updated: 2023-03-09T08:28:16Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.tsf.2011.04.187
language:
- iso: eng
page: 909-912
publication: Thin Solid Films
publication_identifier:
issn:
- 0040-6090
publication_status: published
quality_controlled: '1'
status: public
title: X-ray absorption near-edge spectroscopy investigation of the oxidation state
of Pd species in nanoporous SnO2 gas sensors for methane detection
type: journal_article
user_id: '23547'
year: '2011'
...
---
_id: '25964'
abstract:
- lang: eng
text: Capacitive sensors are the most commonly used devices for the detection of
humidity because they are inexpensive and the detection mechanism is very specific
for humidity. However, especially for industrial processes, there is a lack of
dielectrics that are stable at high temperature (>200 °C) and under harsh conditions.
We present a capacitive sensor based on mesoporous silica as the dielectric in
a simple sensor design based on pressed silica pellets. Investigation of the structural
stability of the porous silica under simulated operating conditions as well as
the influence of the pellet production will be shown. Impedance measurements demonstrate
the utility of the sensor at both low (90 °C) and high (up to 210 °C) operating
temperatures.
article_type: original
author:
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Sören
full_name: Krotzky, Sören
last_name: Krotzky
- first_name: Alexander
full_name: Weiß, Alexander
last_name: Weiß
- first_name: Tilman
full_name: Sauerwald, Tilman
last_name: Sauerwald
- first_name: Claus-Dieter
full_name: Kohl, Claus-Dieter
last_name: Kohl
- first_name: Jan
full_name: Roggenbuck, Jan
last_name: Roggenbuck
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Wagner T, Krotzky S, Weiß A, et al. A High Temperature Capacitive Humidity
Sensor Based on Mesoporous Silica. Sensors. Published online 2011:3135-3144.
doi:10.3390/s110303135
apa: Wagner, T., Krotzky, S., Weiß, A., Sauerwald, T., Kohl, C.-D., Roggenbuck,
J., & Tiemann, M. (2011). A High Temperature Capacitive Humidity Sensor Based
on Mesoporous Silica. Sensors, 3135–3144. https://doi.org/10.3390/s110303135
bibtex: '@article{Wagner_Krotzky_Weiß_Sauerwald_Kohl_Roggenbuck_Tiemann_2011, title={A
High Temperature Capacitive Humidity Sensor Based on Mesoporous Silica}, DOI={10.3390/s110303135}, journal={Sensors},
author={Wagner, Thorsten and Krotzky, Sören and Weiß, Alexander and Sauerwald,
Tilman and Kohl, Claus-Dieter and Roggenbuck, Jan and Tiemann, Michael}, year={2011},
pages={3135–3144} }'
chicago: Wagner, Thorsten, Sören Krotzky, Alexander Weiß, Tilman Sauerwald, Claus-Dieter
Kohl, Jan Roggenbuck, and Michael Tiemann. “A High Temperature Capacitive Humidity
Sensor Based on Mesoporous Silica.” Sensors, 2011, 3135–44. https://doi.org/10.3390/s110303135.
ieee: 'T. Wagner et al., “A High Temperature Capacitive Humidity Sensor Based
on Mesoporous Silica,” Sensors, pp. 3135–3144, 2011, doi: 10.3390/s110303135.'
mla: Wagner, Thorsten, et al. “A High Temperature Capacitive Humidity Sensor Based
on Mesoporous Silica.” Sensors, 2011, pp. 3135–44, doi:10.3390/s110303135.
short: T. Wagner, S. Krotzky, A. Weiß, T. Sauerwald, C.-D. Kohl, J. Roggenbuck,
M. Tiemann, Sensors (2011) 3135–3144.
date_created: 2021-10-09T05:01:29Z
date_updated: 2023-03-09T08:30:11Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.3390/s110303135
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/1424-8220/11/3/3135/pdf?version=1403314474
oa: '1'
page: 3135-3144
publication: Sensors
publication_identifier:
issn:
- 1424-8220
publication_status: published
quality_controlled: '1'
status: public
title: A High Temperature Capacitive Humidity Sensor Based on Mesoporous Silica
type: journal_article
user_id: '23547'
year: '2011'
...
---
_id: '25963'
abstract:
- lang: eng
text: We report the synthesis of mesoporous tin dioxide (SnO2) materials with well-defined
particle morphology. The products consist of uniform spheres with a diameter of
5 μm. The spheres are hierarchically porous with two distinct pore modes of 5.0
nm and 52 nm, respectively. This special porosity is the result of a synthesis
procedure which involves a ‘hard templating’ (nanocasting) process. The product
forms an approximately homogeneous monolayer of spheres on a sensor substrate
and shows promising response to methane gas with low cross-sensitivity to water.
The structural properties and gas-sensing performance are compared with a mesoporous
SnO2 material without defined morphology, prepared by a ‘soft templating’ procedure.
article_type: original
author:
- first_name: J.-H.
full_name: Smått, J.-H.
last_name: Smått
- first_name: M.
full_name: Lindén, M.
last_name: Lindén
- first_name: T.
full_name: Wagner, T.
last_name: Wagner
- first_name: C.-D.
full_name: Kohl, C.-D.
last_name: Kohl
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Smått J-H, Lindén M, Wagner T, Kohl C-D, Tiemann M. Micrometer-sized nanoporous
tin dioxide spheres for gas sensing. Sensors and Actuators B: Chemical.
Published online 2011:483-488. doi:10.1016/j.snb.2010.12.051'
apa: 'Smått, J.-H., Lindén, M., Wagner, T., Kohl, C.-D., & Tiemann, M. (2011).
Micrometer-sized nanoporous tin dioxide spheres for gas sensing. Sensors and
Actuators B: Chemical, 483–488. https://doi.org/10.1016/j.snb.2010.12.051'
bibtex: '@article{Smått_Lindén_Wagner_Kohl_Tiemann_2011, title={Micrometer-sized
nanoporous tin dioxide spheres for gas sensing}, DOI={10.1016/j.snb.2010.12.051},
journal={Sensors and Actuators B: Chemical}, author={Smått, J.-H. and Lindén,
M. and Wagner, T. and Kohl, C.-D. and Tiemann, Michael}, year={2011}, pages={483–488}
}'
chicago: 'Smått, J.-H., M. Lindén, T. Wagner, C.-D. Kohl, and Michael Tiemann. “Micrometer-Sized
Nanoporous Tin Dioxide Spheres for Gas Sensing.” Sensors and Actuators B: Chemical,
2011, 483–88. https://doi.org/10.1016/j.snb.2010.12.051.'
ieee: 'J.-H. Smått, M. Lindén, T. Wagner, C.-D. Kohl, and M. Tiemann, “Micrometer-sized
nanoporous tin dioxide spheres for gas sensing,” Sensors and Actuators B: Chemical,
pp. 483–488, 2011, doi: 10.1016/j.snb.2010.12.051.'
mla: 'Smått, J. H., et al. “Micrometer-Sized Nanoporous Tin Dioxide Spheres for
Gas Sensing.” Sensors and Actuators B: Chemical, 2011, pp. 483–88, doi:10.1016/j.snb.2010.12.051.'
short: 'J.-H. Smått, M. Lindén, T. Wagner, C.-D. Kohl, M. Tiemann, Sensors and Actuators
B: Chemical (2011) 483–488.'
date_created: 2021-10-09T05:00:31Z
date_updated: 2023-03-09T08:30:50Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.snb.2010.12.051
language:
- iso: eng
page: 483-488
publication: 'Sensors and Actuators B: Chemical'
publication_identifier:
issn:
- 0925-4005
publication_status: published
quality_controlled: '1'
status: public
title: Micrometer-sized nanoporous tin dioxide spheres for gas sensing
type: journal_article
user_id: '23547'
year: '2011'
...
---
_id: '25961'
abstract:
- lang: eng
text: Mesoporous In2O3, synthesized by a nanocasting procedure, is used as a resistive
gas sensor for ozone in very low concentrations (from 20 ppb to 2.4 ppm) at room
temperature. Its sensing performance is substantially increased by illumination
with blue light (460 nm, 2.7 eV). For low ozone concentrations the sensor response
increases with increasing humidity. However, higher humidity also results in the
occurrence of a saturation of the response at lower ozone concentrations; this
is rationalized by assuming a poisoning of surface active sites by hydroxyl groups.
article_type: original
author:
- first_name: T.
full_name: Wagner, T.
last_name: Wagner
- first_name: J.
full_name: Hennemann, J.
last_name: Hennemann
- first_name: C.-D.
full_name: Kohl, C.-D.
last_name: Kohl
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Wagner T, Hennemann J, Kohl C-D, Tiemann M. Photocatalytic ozone sensor based
on mesoporous indium oxide: Influence of the relative humidity on the sensing
performance. Thin Solid Films. Published online 2011:918-921. doi:10.1016/j.tsf.2011.04.181'
apa: 'Wagner, T., Hennemann, J., Kohl, C.-D., & Tiemann, M. (2011). Photocatalytic
ozone sensor based on mesoporous indium oxide: Influence of the relative humidity
on the sensing performance. Thin Solid Films, 918–921. https://doi.org/10.1016/j.tsf.2011.04.181'
bibtex: '@article{Wagner_Hennemann_Kohl_Tiemann_2011, title={Photocatalytic ozone
sensor based on mesoporous indium oxide: Influence of the relative humidity on
the sensing performance}, DOI={10.1016/j.tsf.2011.04.181},
journal={Thin Solid Films}, author={Wagner, T. and Hennemann, J. and Kohl, C.-D.
and Tiemann, Michael}, year={2011}, pages={918–921} }'
chicago: 'Wagner, T., J. Hennemann, C.-D. Kohl, and Michael Tiemann. “Photocatalytic
Ozone Sensor Based on Mesoporous Indium Oxide: Influence of the Relative Humidity
on the Sensing Performance.” Thin Solid Films, 2011, 918–21. https://doi.org/10.1016/j.tsf.2011.04.181.'
ieee: 'T. Wagner, J. Hennemann, C.-D. Kohl, and M. Tiemann, “Photocatalytic ozone
sensor based on mesoporous indium oxide: Influence of the relative humidity on
the sensing performance,” Thin Solid Films, pp. 918–921, 2011, doi: 10.1016/j.tsf.2011.04.181.'
mla: 'Wagner, T., et al. “Photocatalytic Ozone Sensor Based on Mesoporous Indium
Oxide: Influence of the Relative Humidity on the Sensing Performance.” Thin
Solid Films, 2011, pp. 918–21, doi:10.1016/j.tsf.2011.04.181.'
short: T. Wagner, J. Hennemann, C.-D. Kohl, M. Tiemann, Thin Solid Films (2011)
918–921.
date_created: 2021-10-09T04:57:57Z
date_updated: 2023-03-09T08:29:14Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.tsf.2011.04.181
language:
- iso: eng
page: 918-921
publication: Thin Solid Films
publication_identifier:
issn:
- 0040-6090
publication_status: published
quality_controlled: '1'
status: public
title: 'Photocatalytic ozone sensor based on mesoporous indium oxide: Influence of
the relative humidity on the sensing performance'
type: journal_article
user_id: '23547'
year: '2011'
...
---
_id: '25971'
abstract:
- lang: eng
text: 'Precipitation of zinc sulfide particles is a very rapid process, and monitoring
of the particle growth is experimentally very demanding. Applying a liquid jet
flow cell, we were able to follow zinc sulfide particle formation on time scales
down to 10−5 s. The flow cell was designed in such a way that data acquisition
on the microsecond time scale was possible under steady-state conditions along
a liquid jet (tubular reactor concept), allowing SAXS data accumulation over a
time scale of minutes. We were able to monitor the growth of zinc sulfide particles
and found experimental evidence for very rapid particle aggregation processes
within the liquid jet. Under the experimental conditions the particle growth is
controlled by mass transfer: i.e., the diffusion of the hydrogen sulfide into
the liquid jet.'
article_type: original
author:
- first_name: Wolfgang
full_name: Schmidt, Wolfgang
last_name: Schmidt
- first_name: Patrick
full_name: Bussian, Patrick
last_name: Bussian
- first_name: Mika
full_name: Lindén, Mika
last_name: Lindén
- first_name: Heinz
full_name: Amenitsch, Heinz
last_name: Amenitsch
- first_name: Patrik
full_name: Agren, Patrik
last_name: Agren
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Ferdi
full_name: Schüth, Ferdi
last_name: Schüth
citation:
ama: 'Schmidt W, Bussian P, Lindén M, et al. Accessing Ultrashort Reaction Times
in Particle Formation with SAXS Experiments: ZnS Precipitation on the Microsecond
Time Scale. Journal of the American Chemical Society. Published online
2010:6822-6826. doi:10.1021/ja101519z'
apa: 'Schmidt, W., Bussian, P., Lindén, M., Amenitsch, H., Agren, P., Tiemann, M.,
& Schüth, F. (2010). Accessing Ultrashort Reaction Times in Particle Formation
with SAXS Experiments: ZnS Precipitation on the Microsecond Time Scale. Journal
of the American Chemical Society, 6822–6826. https://doi.org/10.1021/ja101519z'
bibtex: '@article{Schmidt_Bussian_Lindén_Amenitsch_Agren_Tiemann_Schüth_2010, title={Accessing
Ultrashort Reaction Times in Particle Formation with SAXS Experiments: ZnS Precipitation
on the Microsecond Time Scale}, DOI={10.1021/ja101519z},
journal={Journal of the American Chemical Society}, author={Schmidt, Wolfgang
and Bussian, Patrick and Lindén, Mika and Amenitsch, Heinz and Agren, Patrik and
Tiemann, Michael and Schüth, Ferdi}, year={2010}, pages={6822–6826} }'
chicago: 'Schmidt, Wolfgang, Patrick Bussian, Mika Lindén, Heinz Amenitsch, Patrik
Agren, Michael Tiemann, and Ferdi Schüth. “Accessing Ultrashort Reaction Times
in Particle Formation with SAXS Experiments: ZnS Precipitation on the Microsecond
Time Scale.” Journal of the American Chemical Society, 2010, 6822–26. https://doi.org/10.1021/ja101519z.'
ieee: 'W. Schmidt et al., “Accessing Ultrashort Reaction Times in Particle
Formation with SAXS Experiments: ZnS Precipitation on the Microsecond Time Scale,”
Journal of the American Chemical Society, pp. 6822–6826, 2010, doi: 10.1021/ja101519z.'
mla: 'Schmidt, Wolfgang, et al. “Accessing Ultrashort Reaction Times in Particle
Formation with SAXS Experiments: ZnS Precipitation on the Microsecond Time Scale.”
Journal of the American Chemical Society, 2010, pp. 6822–26, doi:10.1021/ja101519z.'
short: W. Schmidt, P. Bussian, M. Lindén, H. Amenitsch, P. Agren, M. Tiemann, F.
Schüth, Journal of the American Chemical Society (2010) 6822–6826.
date_created: 2021-10-09T05:07:01Z
date_updated: 2023-03-09T08:34:00Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/ja101519z
language:
- iso: eng
page: 6822-6826
publication: Journal of the American Chemical Society
publication_identifier:
issn:
- 0002-7863
- 1520-5126
publication_status: published
quality_controlled: '1'
status: public
title: 'Accessing Ultrashort Reaction Times in Particle Formation with SAXS Experiments:
ZnS Precipitation on the Microsecond Time Scale'
type: journal_article
user_id: '23547'
year: '2010'
...
---
_id: '25967'
abstract:
- lang: eng
text: We report the structural characterization and gas sensing properties of mesoporous
SnO2 synthesized by structure replication (nanocasting) from ordered mesoporous
KIT-6 silica. The products show a high thermal stability with no structural loss
up to 600 °C and only minor decrease in specific surface area by 18% at 800 °C,
as proven by powder X-ray diffraction (PXRD), transmission electron microscopy
(TEM), and nitrogen physisorption. In particular, the samples turn out to be much
more stable than porous SnO2 materials prepared by sol–gel-based synthesis procedures
for comparison. The thermal stability facilitates the utilization of the materials
as sensors for combustible gases which react at high temperatures; test measurements
reveal promising responses to methane (CH4) as an example.
article_type: original
author:
- first_name: T.
full_name: Waitz, T.
last_name: Waitz
- first_name: B.
full_name: Becker, B.
last_name: Becker
- first_name: T.
full_name: Wagner, T.
last_name: Wagner
- first_name: T.
full_name: Sauerwald, T.
last_name: Sauerwald
- first_name: C.-D.
full_name: Kohl, C.-D.
last_name: Kohl
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Waitz T, Becker B, Wagner T, Sauerwald T, Kohl C-D, Tiemann M. Ordered nanoporous
SnO2 gas sensors with high thermal stability. Sensors and Actuators B: Chemical.
Published online 2010:788-793. doi:10.1016/j.snb.2010.08.001'
apa: 'Waitz, T., Becker, B., Wagner, T., Sauerwald, T., Kohl, C.-D., & Tiemann,
M. (2010). Ordered nanoporous SnO2 gas sensors with high thermal stability. Sensors
and Actuators B: Chemical, 788–793. https://doi.org/10.1016/j.snb.2010.08.001'
bibtex: '@article{Waitz_Becker_Wagner_Sauerwald_Kohl_Tiemann_2010, title={Ordered
nanoporous SnO2 gas sensors with high thermal stability}, DOI={10.1016/j.snb.2010.08.001},
journal={Sensors and Actuators B: Chemical}, author={Waitz, T. and Becker, B.
and Wagner, T. and Sauerwald, T. and Kohl, C.-D. and Tiemann, Michael}, year={2010},
pages={788–793} }'
chicago: 'Waitz, T., B. Becker, T. Wagner, T. Sauerwald, C.-D. Kohl, and Michael
Tiemann. “Ordered Nanoporous SnO2 Gas Sensors with High Thermal Stability.” Sensors
and Actuators B: Chemical, 2010, 788–93. https://doi.org/10.1016/j.snb.2010.08.001.'
ieee: 'T. Waitz, B. Becker, T. Wagner, T. Sauerwald, C.-D. Kohl, and M. Tiemann,
“Ordered nanoporous SnO2 gas sensors with high thermal stability,” Sensors
and Actuators B: Chemical, pp. 788–793, 2010, doi: 10.1016/j.snb.2010.08.001.'
mla: 'Waitz, T., et al. “Ordered Nanoporous SnO2 Gas Sensors with High Thermal Stability.”
Sensors and Actuators B: Chemical, 2010, pp. 788–93, doi:10.1016/j.snb.2010.08.001.'
short: 'T. Waitz, B. Becker, T. Wagner, T. Sauerwald, C.-D. Kohl, M. Tiemann, Sensors
and Actuators B: Chemical (2010) 788–793.'
date_created: 2021-10-09T05:04:40Z
date_updated: 2023-03-09T08:35:09Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.snb.2010.08.001
language:
- iso: eng
page: 788-793
publication: 'Sensors and Actuators B: Chemical'
publication_identifier:
issn:
- 0925-4005
publication_status: published
quality_controlled: '1'
status: public
title: Ordered nanoporous SnO2 gas sensors with high thermal stability
type: journal_article
user_id: '23547'
year: '2010'
...
---
_id: '25972'
abstract:
- lang: eng
text: In2O3 with ordered, uniform mesoporosity is prepared by nanocasting, using
various porous silica phases (KIT-6, SBA-15) as structure matrices. The In2O3
particles exhibit well-defined morphologies (spherical or ellipsoidal, depending
on the choice of silica matrix) and quite uniform sizes in the range of a few
hundred nanometers. The regular morphology of the In2O3 particles is not associated
with the morphological properties of the silica matrices. Instead, it is the result
of the growth mechanism of In2O3 inside the silica pores; this mechanism is investigated
in some detail. Hence, the nanocasting method offers a versatile and simple way
of creating mesoporous In2O3 with regular morphology; this will be beneficial
for many applications that require well-defined morphological properties, such
as gas sensing or catalysis.
article_type: original
author:
- first_name: Stefanie
full_name: Haffer, Stefanie
last_name: Haffer
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Haffer S, Waitz T, Tiemann M. Mesoporous In2O3 with Regular Morphology by
Nanocasting: A Simple Relation between Defined Particle Shape and Growth Mechanism.
The Journal of Physical Chemistry C. Published online 2010:2075-2081. doi:10.1021/jp910336f'
apa: 'Haffer, S., Waitz, T., & Tiemann, M. (2010). Mesoporous In2O3 with Regular
Morphology by Nanocasting: A Simple Relation between Defined Particle Shape and
Growth Mechanism. The Journal of Physical Chemistry C, 2075–2081. https://doi.org/10.1021/jp910336f'
bibtex: '@article{Haffer_Waitz_Tiemann_2010, title={Mesoporous In2O3 with Regular
Morphology by Nanocasting: A Simple Relation between Defined Particle Shape and
Growth Mechanism}, DOI={10.1021/jp910336f},
journal={The Journal of Physical Chemistry C}, author={Haffer, Stefanie and Waitz,
Thomas and Tiemann, Michael}, year={2010}, pages={2075–2081} }'
chicago: 'Haffer, Stefanie, Thomas Waitz, and Michael Tiemann. “Mesoporous In2O3
with Regular Morphology by Nanocasting: A Simple Relation between Defined Particle
Shape and Growth Mechanism.” The Journal of Physical Chemistry C, 2010,
2075–81. https://doi.org/10.1021/jp910336f.'
ieee: 'S. Haffer, T. Waitz, and M. Tiemann, “Mesoporous In2O3 with Regular Morphology
by Nanocasting: A Simple Relation between Defined Particle Shape and Growth Mechanism,”
The Journal of Physical Chemistry C, pp. 2075–2081, 2010, doi: 10.1021/jp910336f.'
mla: 'Haffer, Stefanie, et al. “Mesoporous In2O3 with Regular Morphology by Nanocasting:
A Simple Relation between Defined Particle Shape and Growth Mechanism.” The
Journal of Physical Chemistry C, 2010, pp. 2075–81, doi:10.1021/jp910336f.'
short: S. Haffer, T. Waitz, M. Tiemann, The Journal of Physical Chemistry C (2010)
2075–2081.
date_created: 2021-10-09T05:07:48Z
date_updated: 2023-03-09T08:34:42Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/jp910336f
language:
- iso: eng
page: 2075-2081
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
quality_controlled: '1'
status: public
title: 'Mesoporous In2O3 with Regular Morphology by Nanocasting: A Simple Relation
between Defined Particle Shape and Growth Mechanism'
type: journal_article
user_id: '23547'
year: '2010'
...
---
_id: '25968'
abstract:
- lang: eng
text: We report the synthesis of monodisperse, spherical periodic mesoporous organosilica
(PMO) materials. The particles have diameters between about 350 and 550 nm. They
exhibit a regular core-shell structure with a solid, non-porous silica core and
a mesoporous PMO shell with a thickness of approximately 75 nm and uniform pores
of about 1.7 nm. The synthesis of the core and the shell is carried out in a one-pot,
two-stage synthesis and can be accomplished at temperatures between 25 and 100 °C.
Higher synthesis temperatures lead to substantial shrinking of the solid core,
generating an empty void between core and shell. This leads to interesting cavitation
phenomena in the nitrogen physisorption analysis at 77.4 K.
article_type: original
author:
- first_name: Stefanie
full_name: Haffer, Stefanie
last_name: Haffer
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Michael
full_name: Fröba, Michael
last_name: Fröba
citation:
ama: Haffer S, Tiemann M, Fröba M. Periodic Mesoporous Organosilica (PMO) Materials
with Uniform Spherical Core-Shell Structure. Chemistry - A European Journal.
Published online 2010:10447-10452. doi:10.1002/chem.201000643
apa: Haffer, S., Tiemann, M., & Fröba, M. (2010). Periodic Mesoporous Organosilica
(PMO) Materials with Uniform Spherical Core-Shell Structure. Chemistry - A
European Journal, 10447–10452. https://doi.org/10.1002/chem.201000643
bibtex: '@article{Haffer_Tiemann_Fröba_2010, title={Periodic Mesoporous Organosilica
(PMO) Materials with Uniform Spherical Core-Shell Structure}, DOI={10.1002/chem.201000643},
journal={Chemistry - A European Journal}, author={Haffer, Stefanie and Tiemann,
Michael and Fröba, Michael}, year={2010}, pages={10447–10452} }'
chicago: Haffer, Stefanie, Michael Tiemann, and Michael Fröba. “Periodic Mesoporous
Organosilica (PMO) Materials with Uniform Spherical Core-Shell Structure.” Chemistry
- A European Journal, 2010, 10447–52. https://doi.org/10.1002/chem.201000643.
ieee: 'S. Haffer, M. Tiemann, and M. Fröba, “Periodic Mesoporous Organosilica (PMO)
Materials with Uniform Spherical Core-Shell Structure,” Chemistry - A European
Journal, pp. 10447–10452, 2010, doi: 10.1002/chem.201000643.'
mla: Haffer, Stefanie, et al. “Periodic Mesoporous Organosilica (PMO) Materials
with Uniform Spherical Core-Shell Structure.” Chemistry - A European Journal,
2010, pp. 10447–52, doi:10.1002/chem.201000643.
short: S. Haffer, M. Tiemann, M. Fröba, Chemistry - A European Journal (2010) 10447–10452.
date_created: 2021-10-09T05:06:03Z
date_updated: 2023-03-09T08:35:54Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/chem.201000643
language:
- iso: eng
page: 10447-10452
publication: Chemistry - A European Journal
publication_identifier:
issn:
- 0947-6539
publication_status: published
quality_controlled: '1'
status: public
title: Periodic Mesoporous Organosilica (PMO) Materials with Uniform Spherical Core-Shell
Structure
type: journal_article
user_id: '23547'
year: '2010'
...
---
_id: '25973'
abstract:
- lang: eng
text: Chemical sensors are integral to the automation of myriad industrial processes,
as well as everyday monitoring of such activities as public safety, engine performance,
medical therapeutics, and many more...
author:
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Tiemann M. Ordered Mesoporous Films and Membranes: Synthesis, Properties and
Applications in Gas Sensors. In: Korotcenkov G, ed. Nanostructured Materials.
Vol 2. Chemical Sensors. Momentum Press; 2010:291-310.'
apa: 'Tiemann, M. (2010). Ordered Mesoporous Films and Membranes: Synthesis, Properties
and Applications in Gas Sensors. In G. Korotcenkov (Ed.), Nanostructured Materials
(Vol. 2, pp. 291–310). Momentum Press.'
bibtex: '@inbook{Tiemann_2010, place={New Jersey}, series={Chemical Sensors}, title={Ordered
Mesoporous Films and Membranes: Synthesis, Properties and Applications in Gas
Sensors}, volume={2}, booktitle={Nanostructured Materials}, publisher={Momentum
Press}, author={Tiemann, Michael}, editor={Korotcenkov, Ghenadii}, year={2010},
pages={291–310}, collection={Chemical Sensors} }'
chicago: 'Tiemann, Michael. “Ordered Mesoporous Films and Membranes: Synthesis,
Properties and Applications in Gas Sensors.” In Nanostructured Materials,
edited by Ghenadii Korotcenkov, 2:291–310. Chemical Sensors. New Jersey: Momentum
Press, 2010.'
ieee: 'M. Tiemann, “Ordered Mesoporous Films and Membranes: Synthesis, Properties
and Applications in Gas Sensors,” in Nanostructured Materials, vol. 2,
G. Korotcenkov, Ed. New Jersey: Momentum Press, 2010, pp. 291–310.'
mla: 'Tiemann, Michael. “Ordered Mesoporous Films and Membranes: Synthesis, Properties
and Applications in Gas Sensors.” Nanostructured Materials, edited by Ghenadii
Korotcenkov, vol. 2, Momentum Press, 2010, pp. 291–310.'
short: 'M. Tiemann, in: G. Korotcenkov (Ed.), Nanostructured Materials, Momentum
Press, New Jersey, 2010, pp. 291–310.'
date_created: 2021-10-09T05:23:17Z
date_updated: 2023-03-09T08:40:44Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
editor:
- first_name: Ghenadii
full_name: Korotcenkov, Ghenadii
last_name: Korotcenkov
intvolume: ' 2'
language:
- iso: eng
page: 291 - 310
place: New Jersey
publication: Nanostructured Materials
publication_identifier:
unknown:
- 978-1-60650-106-1
publisher: Momentum Press
quality_controlled: '1'
series_title: Chemical Sensors
status: public
title: 'Ordered Mesoporous Films and Membranes: Synthesis, Properties and Applications
in Gas Sensors'
type: book_chapter
user_id: '23547'
volume: 2
year: '2010'
...
---
_id: '25975'
abstract:
- lang: eng
text: The synthesis and characterization of ordered mesoporous In2O3 materials by
structure replication from hexagonal mesoporous SBA-15 silica and cubic KIT-6
silica is presented. Variation of the synthesis parameters allows for different
pore sizes and pore wall thicknesses in the products. The In2O3 samples turn out
to be stable up to temperatures between 450 °C and 650 °C; such high thermal stability
is necessary for their application as gas sensors. Test measurements show a high
sensitivity to methane gas in concentrations relevant for explosion prevention.
The sensitivity is shown to be correlated not only with the surface-to-volume
ratio, but also with the nanoscopic structural properties of the materials.
article_type: original
author:
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Tilman
full_name: Sauerwald, Tilman
last_name: Sauerwald
- first_name: Claus-Dieter
full_name: Kohl, Claus-Dieter
last_name: Kohl
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Waitz T, Wagner T, Sauerwald T, Kohl C-D, Tiemann M. Ordered Mesoporous In2O3:
Synthesis by Structure Replication and Application as a Methane Gas Sensor. Advanced
Functional Materials. Published online 2009:653-661. doi:10.1002/adfm.200801458'
apa: 'Waitz, T., Wagner, T., Sauerwald, T., Kohl, C.-D., & Tiemann, M. (2009).
Ordered Mesoporous In2O3: Synthesis by Structure Replication and Application as
a Methane Gas Sensor. Advanced Functional Materials, 653–661. https://doi.org/10.1002/adfm.200801458'
bibtex: '@article{Waitz_Wagner_Sauerwald_Kohl_Tiemann_2009, title={Ordered Mesoporous
In2O3: Synthesis by Structure Replication and Application as a Methane Gas Sensor},
DOI={10.1002/adfm.200801458},
journal={Advanced Functional Materials}, author={Waitz, Thomas and Wagner, Thorsten
and Sauerwald, Tilman and Kohl, Claus-Dieter and Tiemann, Michael}, year={2009},
pages={653–661} }'
chicago: 'Waitz, Thomas, Thorsten Wagner, Tilman Sauerwald, Claus-Dieter Kohl, and
Michael Tiemann. “Ordered Mesoporous In2O3: Synthesis by Structure Replication
and Application as a Methane Gas Sensor.” Advanced Functional Materials,
2009, 653–61. https://doi.org/10.1002/adfm.200801458.'
ieee: 'T. Waitz, T. Wagner, T. Sauerwald, C.-D. Kohl, and M. Tiemann, “Ordered Mesoporous
In2O3: Synthesis by Structure Replication and Application as a Methane Gas Sensor,”
Advanced Functional Materials, pp. 653–661, 2009, doi: 10.1002/adfm.200801458.'
mla: 'Waitz, Thomas, et al. “Ordered Mesoporous In2O3: Synthesis by Structure Replication
and Application as a Methane Gas Sensor.” Advanced Functional Materials,
2009, pp. 653–61, doi:10.1002/adfm.200801458.'
short: T. Waitz, T. Wagner, T. Sauerwald, C.-D. Kohl, M. Tiemann, Advanced Functional
Materials (2009) 653–661.
date_created: 2021-10-09T05:31:04Z
date_updated: 2023-03-09T08:42:44Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.200801458
extern: '1'
language:
- iso: eng
page: 653-661
publication: Advanced Functional Materials
publication_identifier:
issn:
- 1616-301X
- 1616-3028
publication_status: published
quality_controlled: '1'
status: public
title: 'Ordered Mesoporous In2O3: Synthesis by Structure Replication and Application
as a Methane Gas Sensor'
type: journal_article
user_id: '23547'
year: '2009'
...
---
_id: '25977'
abstract:
- lang: eng
text: We report a systematic study of the photoluminescence properties of ZnO nanostructures.
In particular, mesoporous ZnO powders of varying surface-to-mass ratio are investigated
and compared to a bulk reference. At low temperatures the emission from higher-energy
states is very pronounced and even dominant for samples with high surface-to-mass
ratio.
article_type: original
author:
- first_name: Michael
full_name: Schwalm, Michael
last_name: Schwalm
- first_name: Swantje
full_name: Horst, Swantje
last_name: Horst
- first_name: Alexej
full_name: Chernikov, Alexej
last_name: Chernikov
- first_name: Wolfgang W.
full_name: Rühle, Wolfgang W.
last_name: Rühle
- first_name: Stephan
full_name: Lautenschläger, Stephan
last_name: Lautenschläger
- first_name: Peter J.
full_name: Klar, Peter J.
last_name: Klar
- first_name: Bruno K.
full_name: Meyer, Bruno K.
last_name: Meyer
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Sangam
full_name: Chatterjee, Sangam
last_name: Chatterjee
citation:
ama: Schwalm M, Horst S, Chernikov A, et al. Time-resolved photoluminescence study
of mesoporous ZnO nanostructures. physica status solidi (c). Published
online 2009:542-545. doi:10.1002/pssc.200880315
apa: Schwalm, M., Horst, S., Chernikov, A., Rühle, W. W., Lautenschläger, S., Klar,
P. J., Meyer, B. K., Waitz, T., Tiemann, M., & Chatterjee, S. (2009). Time-resolved
photoluminescence study of mesoporous ZnO nanostructures. Physica Status Solidi
(c), 542–545. https://doi.org/10.1002/pssc.200880315
bibtex: '@article{Schwalm_Horst_Chernikov_Rühle_Lautenschläger_Klar_Meyer_Waitz_Tiemann_Chatterjee_2009,
title={Time-resolved photoluminescence study of mesoporous ZnO nanostructures},
DOI={10.1002/pssc.200880315},
journal={physica status solidi (c)}, author={Schwalm, Michael and Horst, Swantje
and Chernikov, Alexej and Rühle, Wolfgang W. and Lautenschläger, Stephan and Klar,
Peter J. and Meyer, Bruno K. and Waitz, Thomas and Tiemann, Michael and Chatterjee,
Sangam}, year={2009}, pages={542–545} }'
chicago: Schwalm, Michael, Swantje Horst, Alexej Chernikov, Wolfgang W. Rühle, Stephan
Lautenschläger, Peter J. Klar, Bruno K. Meyer, Thomas Waitz, Michael Tiemann,
and Sangam Chatterjee. “Time-Resolved Photoluminescence Study of Mesoporous ZnO
Nanostructures.” Physica Status Solidi (c), 2009, 542–45. https://doi.org/10.1002/pssc.200880315.
ieee: 'M. Schwalm et al., “Time-resolved photoluminescence study of mesoporous
ZnO nanostructures,” physica status solidi (c), pp. 542–545, 2009, doi:
10.1002/pssc.200880315.'
mla: Schwalm, Michael, et al. “Time-Resolved Photoluminescence Study of Mesoporous
ZnO Nanostructures.” Physica Status Solidi (c), 2009, pp. 542–45, doi:10.1002/pssc.200880315.
short: M. Schwalm, S. Horst, A. Chernikov, W.W. Rühle, S. Lautenschläger, P.J. Klar,
B.K. Meyer, T. Waitz, M. Tiemann, S. Chatterjee, Physica Status Solidi (c) (2009)
542–545.
date_created: 2021-10-09T05:32:42Z
date_updated: 2023-03-09T08:41:29Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/pssc.200880315
extern: '1'
language:
- iso: eng
page: 542-545
publication: physica status solidi (c)
publication_identifier:
issn:
- 1610-1634
- 1610-1642
publication_status: published
quality_controlled: '1'
status: public
title: Time-resolved photoluminescence study of mesoporous ZnO nanostructures
type: journal_article
user_id: '23547'
year: '2009'
...
---
_id: '25974'
abstract:
- lang: eng
text: We present the preparation of a semiconductor gas sensor based on ordered
mesoporous In2O3. The In2O3 was synthesized by structure replication procedure
from cubic KIT-6 silica. A detailed analysis of the morphology of the mesoporous
powders as well as of the prepared sensing layer will be shown. Unique properties
arise from the synthesis method of structure replication such as well defined
porosity in the mesoporous regime and nanocrystallites with high thermal stability
up to 450 °C. These properties are useful for the application in semiconducting
gas sensors. Test measurements show sensitivity to methane gas in concentrations
relevant for explosion prevention.
article_type: original
author:
- first_name: T.
full_name: Wagner, T.
last_name: Wagner
- first_name: T.
full_name: Sauerwald, T.
last_name: Sauerwald
- first_name: C.-D.
full_name: Kohl, C.-D.
last_name: Kohl
- first_name: T.
full_name: Waitz, T.
last_name: Waitz
- first_name: C.
full_name: Weidmann, C.
last_name: Weidmann
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Wagner T, Sauerwald T, Kohl C-D, Waitz T, Weidmann C, Tiemann M. Gas sensor
based on ordered mesoporous In2O3. Thin Solid Films. Published online 2009:6170-6175.
doi:10.1016/j.tsf.2009.04.013
apa: Wagner, T., Sauerwald, T., Kohl, C.-D., Waitz, T., Weidmann, C., & Tiemann,
M. (2009). Gas sensor based on ordered mesoporous In2O3. Thin Solid Films,
6170–6175. https://doi.org/10.1016/j.tsf.2009.04.013
bibtex: '@article{Wagner_Sauerwald_Kohl_Waitz_Weidmann_Tiemann_2009, title={Gas
sensor based on ordered mesoporous In2O3}, DOI={10.1016/j.tsf.2009.04.013},
journal={Thin Solid Films}, author={Wagner, T. and Sauerwald, T. and Kohl, C.-D.
and Waitz, T. and Weidmann, C. and Tiemann, Michael}, year={2009}, pages={6170–6175}
}'
chicago: Wagner, T., T. Sauerwald, C.-D. Kohl, T. Waitz, C. Weidmann, and Michael
Tiemann. “Gas Sensor Based on Ordered Mesoporous In2O3.” Thin Solid Films,
2009, 6170–75. https://doi.org/10.1016/j.tsf.2009.04.013.
ieee: 'T. Wagner, T. Sauerwald, C.-D. Kohl, T. Waitz, C. Weidmann, and M. Tiemann,
“Gas sensor based on ordered mesoporous In2O3,” Thin Solid Films, pp. 6170–6175,
2009, doi: 10.1016/j.tsf.2009.04.013.'
mla: Wagner, T., et al. “Gas Sensor Based on Ordered Mesoporous In2O3.” Thin
Solid Films, 2009, pp. 6170–75, doi:10.1016/j.tsf.2009.04.013.
short: T. Wagner, T. Sauerwald, C.-D. Kohl, T. Waitz, C. Weidmann, M. Tiemann, Thin
Solid Films (2009) 6170–6175.
date_created: 2021-10-09T05:28:49Z
date_updated: 2023-03-09T08:43:33Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.tsf.2009.04.013
extern: '1'
language:
- iso: eng
page: 6170-6175
publication: Thin Solid Films
publication_identifier:
issn:
- 0040-6090
publication_status: published
quality_controlled: '1'
status: public
title: Gas sensor based on ordered mesoporous In2O3
type: journal_article
user_id: '23547'
year: '2009'
...
---
_id: '25976'
abstract:
- lang: eng
text: Halbleitende Metalloxid-Gassensoren werden sowohl im industriellen Bereich
als auch im Haushalt zur Luftüberwachung verwendet. Die Funktionsweise basiert
auf einer reversiblen Änderung des Sensorwiderstandes in Anwesenheit sowohl oxidierender
als auch reduzierender Gase, die mit einfachen Mitteln gemessen werden kann. In
diesem Artikel wird vorgestellt, wie sich die bei der Gasdetektion ablaufenden
Vorgänge mit Hilfe des Ionosorptionsmodells in Kombination mit einem einfachen
Festkörperbändermodell deuten lassen. Abschließend werden einfache, im Chemieunterricht
zu realisierende Experimente mit Gassensoren präsentiert.
article_type: original
author:
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Waitz T, Tiemann M. Halbleitende Metalloxide als Gassensoren im Chemieunterricht.
CHEMKON. Published online 2009:183-186. doi:10.1002/ckon.200910099
apa: Waitz, T., & Tiemann, M. (2009). Halbleitende Metalloxide als Gassensoren
im Chemieunterricht. CHEMKON, 183–186. https://doi.org/10.1002/ckon.200910099
bibtex: '@article{Waitz_Tiemann_2009, title={Halbleitende Metalloxide als Gassensoren
im Chemieunterricht}, DOI={10.1002/ckon.200910099},
journal={CHEMKON}, author={Waitz, Thomas and Tiemann, Michael}, year={2009}, pages={183–186}
}'
chicago: Waitz, Thomas, and Michael Tiemann. “Halbleitende Metalloxide Als Gassensoren
Im Chemieunterricht.” CHEMKON, 2009, 183–86. https://doi.org/10.1002/ckon.200910099.
ieee: 'T. Waitz and M. Tiemann, “Halbleitende Metalloxide als Gassensoren im Chemieunterricht,”
CHEMKON, pp. 183–186, 2009, doi: 10.1002/ckon.200910099.'
mla: Waitz, Thomas, and Michael Tiemann. “Halbleitende Metalloxide Als Gassensoren
Im Chemieunterricht.” CHEMKON, 2009, pp. 183–86, doi:10.1002/ckon.200910099.
short: T. Waitz, M. Tiemann, CHEMKON (2009) 183–186.
date_created: 2021-10-09T05:31:54Z
date_updated: 2023-03-09T08:43:58Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/ckon.200910099
extern: '1'
language:
- iso: eng
page: 183-186
publication: CHEMKON
publication_identifier:
issn:
- 0944-5846
publication_status: published
quality_controlled: '1'
status: public
title: Halbleitende Metalloxide als Gassensoren im Chemieunterricht
type: journal_article
user_id: '23547'
year: '2009'
...
---
_id: '25980'
abstract:
- lang: eng
text: Mesoporous SBA-15 (space group p6mm), KIT-6 (Ia3d) and KIT-5 (Fm3m) silicas,
exhibiting different 2-D and 3-D channel- or cage-like pore structure and pore
dimensions have been used as supports for iron oxide nanoparticles. The iron modification
of the silica was performed according to a frequently used impregnation technique
from aqueous iron nitrate solution. The materials were characterized by nitrogen
physisorption, X-ray diffraction, TEM–EDX, Moessbauer spectroscopy, and temperature-programmed
reduction (TPR) and tested in the catalytic decomposition of methanol. It is established
that the location and dispersion of iron oxide nanoparticles are affected by the
pore topology of the support. The most homogeneously dispersed iron oxide nanoparticles
are observed using silica host matrix exhibiting a 3-D channel-like structure
and pore diameters about 7 nm, and the thus-obtained composites exhibit high catalytic
activity and selectivity in methanol decomposition to CO and hydrogen. For all
the samples, characterized with a low mesopore volume and small pore diameters/pore
entrances, the formation of larger iron oxide particles, mainly located on the
outer surface, is observed. Inhomogeneously dispersed iron oxide particles with
a large fraction of isolated, strongly interacting with the support, iron species,
and possessing low catalytic activity and usually high selectivity to methane,
are found for the silicas with relatively larger pores/pore entrances.
article_type: original
author:
- first_name: Tanya
full_name: Tsoncheva, Tanya
last_name: Tsoncheva
- first_name: Jessica
full_name: Rosenholm, Jessica
last_name: Rosenholm
- first_name: Mika
full_name: Linden, Mika
last_name: Linden
- first_name: Freddy
full_name: Kleitz, Freddy
last_name: Kleitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Ljubomira
full_name: Ivanova, Ljubomira
last_name: Ivanova
- first_name: Momtchil
full_name: Dimitrov, Momtchil
last_name: Dimitrov
- first_name: Daniela
full_name: Paneva, Daniela
last_name: Paneva
- first_name: Ivan
full_name: Mitov, Ivan
last_name: Mitov
- first_name: Christo
full_name: Minchev, Christo
last_name: Minchev
citation:
ama: Tsoncheva T, Rosenholm J, Linden M, et al. Critical evaluation of the state
of iron oxide nanoparticles on different mesoporous silicas prepared by an impregnation
method. Microporous and Mesoporous Materials. Published online 2008:327-337.
doi:10.1016/j.micromeso.2007.10.005
apa: Tsoncheva, T., Rosenholm, J., Linden, M., Kleitz, F., Tiemann, M., Ivanova,
L., Dimitrov, M., Paneva, D., Mitov, I., & Minchev, C. (2008). Critical evaluation
of the state of iron oxide nanoparticles on different mesoporous silicas prepared
by an impregnation method. Microporous and Mesoporous Materials, 327–337.
https://doi.org/10.1016/j.micromeso.2007.10.005
bibtex: '@article{Tsoncheva_Rosenholm_Linden_Kleitz_Tiemann_Ivanova_Dimitrov_Paneva_Mitov_Minchev_2008,
title={Critical evaluation of the state of iron oxide nanoparticles on different
mesoporous silicas prepared by an impregnation method}, DOI={10.1016/j.micromeso.2007.10.005},
journal={Microporous and Mesoporous Materials}, author={Tsoncheva, Tanya and Rosenholm,
Jessica and Linden, Mika and Kleitz, Freddy and Tiemann, Michael and Ivanova,
Ljubomira and Dimitrov, Momtchil and Paneva, Daniela and Mitov, Ivan and Minchev,
Christo}, year={2008}, pages={327–337} }'
chicago: Tsoncheva, Tanya, Jessica Rosenholm, Mika Linden, Freddy Kleitz, Michael
Tiemann, Ljubomira Ivanova, Momtchil Dimitrov, Daniela Paneva, Ivan Mitov, and
Christo Minchev. “Critical Evaluation of the State of Iron Oxide Nanoparticles
on Different Mesoporous Silicas Prepared by an Impregnation Method.” Microporous
and Mesoporous Materials, 2008, 327–37. https://doi.org/10.1016/j.micromeso.2007.10.005.
ieee: 'T. Tsoncheva et al., “Critical evaluation of the state of iron oxide
nanoparticles on different mesoporous silicas prepared by an impregnation method,”
Microporous and Mesoporous Materials, pp. 327–337, 2008, doi: 10.1016/j.micromeso.2007.10.005.'
mla: Tsoncheva, Tanya, et al. “Critical Evaluation of the State of Iron Oxide Nanoparticles
on Different Mesoporous Silicas Prepared by an Impregnation Method.” Microporous
and Mesoporous Materials, 2008, pp. 327–37, doi:10.1016/j.micromeso.2007.10.005.
short: T. Tsoncheva, J. Rosenholm, M. Linden, F. Kleitz, M. Tiemann, L. Ivanova,
M. Dimitrov, D. Paneva, I. Mitov, C. Minchev, Microporous and Mesoporous Materials
(2008) 327–337.
date_created: 2021-10-09T06:53:42Z
date_updated: 2023-03-09T08:44:27Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.micromeso.2007.10.005
extern: '1'
language:
- iso: eng
page: 327-337
publication: Microporous and Mesoporous Materials
publication_identifier:
issn:
- 1387-1811
publication_status: published
quality_controlled: '1'
status: public
title: Critical evaluation of the state of iron oxide nanoparticles on different mesoporous
silicas prepared by an impregnation method
type: journal_article
user_id: '23547'
year: '2008'
...
---
_id: '25979'
abstract:
- lang: eng
text: Various measures to optimise the impregnation of mesoporous CMK-3 carbon and
SBA-15 silica matrices with metal nitrates for the synthesis of mesoporous metal
oxides by structure replication are investigated. The effect of surface modification
of the matrix pores, the choice of a solvent with suitable polarity, and the concentration
of the metal nitrate solution are studied in detail. The efficiency of pore loading
is monitored by nitrogen physisorption measurements. The creation of polar functions
at the pore surface of CMK-3 carbon is shown to increase the impregnation efficiency
substantially while maximizing the pore wall polarity of SBA-15 silica by increasing
the amount of free silanol groups does not have any significant impact. The choice
of a less polar solvent (THF instead of water) has a positive effect on the wettability
of CMK-3 carbon in the first impregnation cycle but turns out to be disadvantageous
in the second cycle; a similar trend is observed for variation of the metal salt
concentration.
article_type: original
author:
- first_name: Jan
full_name: Roggenbuck, Jan
last_name: Roggenbuck
- first_name: Thomas
full_name: Waitz, Thomas
last_name: Waitz
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: 'Roggenbuck J, Waitz T, Tiemann M. Synthesis of mesoporous metal oxides by
structure replication: Strategies of impregnating porous matrices with metal salts.
Microporous and Mesoporous Materials. Published online 2008:575-582. doi:10.1016/j.micromeso.2007.12.018'
apa: 'Roggenbuck, J., Waitz, T., & Tiemann, M. (2008). Synthesis of mesoporous
metal oxides by structure replication: Strategies of impregnating porous matrices
with metal salts. Microporous and Mesoporous Materials, 575–582. https://doi.org/10.1016/j.micromeso.2007.12.018'
bibtex: '@article{Roggenbuck_Waitz_Tiemann_2008, title={Synthesis of mesoporous
metal oxides by structure replication: Strategies of impregnating porous matrices
with metal salts}, DOI={10.1016/j.micromeso.2007.12.018},
journal={Microporous and Mesoporous Materials}, author={Roggenbuck, Jan and Waitz,
Thomas and Tiemann, Michael}, year={2008}, pages={575–582} }'
chicago: 'Roggenbuck, Jan, Thomas Waitz, and Michael Tiemann. “Synthesis of Mesoporous
Metal Oxides by Structure Replication: Strategies of Impregnating Porous Matrices
with Metal Salts.” Microporous and Mesoporous Materials, 2008, 575–82.
https://doi.org/10.1016/j.micromeso.2007.12.018.'
ieee: 'J. Roggenbuck, T. Waitz, and M. Tiemann, “Synthesis of mesoporous metal oxides
by structure replication: Strategies of impregnating porous matrices with metal
salts,” Microporous and Mesoporous Materials, pp. 575–582, 2008, doi: 10.1016/j.micromeso.2007.12.018.'
mla: 'Roggenbuck, Jan, et al. “Synthesis of Mesoporous Metal Oxides by Structure
Replication: Strategies of Impregnating Porous Matrices with Metal Salts.” Microporous
and Mesoporous Materials, 2008, pp. 575–82, doi:10.1016/j.micromeso.2007.12.018.'
short: J. Roggenbuck, T. Waitz, M. Tiemann, Microporous and Mesoporous Materials
(2008) 575–582.
date_created: 2021-10-09T06:52:34Z
date_updated: 2023-03-09T08:46:47Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.micromeso.2007.12.018
extern: '1'
language:
- iso: eng
page: 575-582
publication: Microporous and Mesoporous Materials
publication_identifier:
issn:
- 1387-1811
publication_status: published
quality_controlled: '1'
status: public
title: 'Synthesis of mesoporous metal oxides by structure replication: Strategies
of impregnating porous matrices with metal salts'
type: journal_article
user_id: '23547'
year: '2008'
...