We determine ozone decomposition on indium oxide by utilizing the gas transducing properties of hierarchically porous monoliths.
"}],"citation":{"bibtex":"@article{Klawinski_Weinberger_Klaus_Smått_Tiemann_Wagner_2017, title={Kinetics of ozone decomposition in porous In2O3 monoliths}, DOI={10.1039/c6cp08874k}, journal={Physical Chemistry Chemical Physics}, author={Klawinski, Danielle and Weinberger, Christian and Klaus, Dominik and Smått, Jan-Henrik and Tiemann, Michael and Wagner, Thorsten}, year={2017}, pages={10326–10332} }","ama":"Klawinski D, Weinberger C, Klaus D, Smått J-H, Tiemann M, Wagner T. Kinetics of ozone decomposition in porous In2O3 monoliths. Physical Chemistry Chemical Physics. Published online 2017:10326-10332. doi:10.1039/c6cp08874k","mla":"Klawinski, Danielle, et al. “Kinetics of Ozone Decomposition in Porous In2O3 Monoliths.” Physical Chemistry Chemical Physics, 2017, pp. 10326–32, doi:10.1039/c6cp08874k.","short":"D. Klawinski, C. Weinberger, D. Klaus, J.-H. Smått, M. Tiemann, T. Wagner, Physical Chemistry Chemical Physics (2017) 10326–10332.","chicago":"Klawinski, Danielle, Christian Weinberger, Dominik Klaus, Jan-Henrik Smått, Michael Tiemann, and Thorsten Wagner. “Kinetics of Ozone Decomposition in Porous In2O3 Monoliths.” Physical Chemistry Chemical Physics, 2017, 10326–32. https://doi.org/10.1039/c6cp08874k.","ieee":"D. Klawinski, C. Weinberger, D. Klaus, J.-H. Smått, M. Tiemann, and T. Wagner, “Kinetics of ozone decomposition in porous In2O3 monoliths,” Physical Chemistry Chemical Physics, pp. 10326–10332, 2017, doi: 10.1039/c6cp08874k.","apa":"Klawinski, D., Weinberger, C., Klaus, D., Smått, J.-H., Tiemann, M., & Wagner, T. (2017). Kinetics of ozone decomposition in porous In2O3 monoliths. Physical Chemistry Chemical Physics, 10326–10332. https://doi.org/10.1039/c6cp08874k"},"publication":"Physical Chemistry Chemical Physics"},{"date_created":"2021-10-08T11:05:54Z","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"311"}],"type":"journal_article","citation":{"short":"C. Weinberger, Z. Chen, W. Birnbaum, D. Kuckling, M. Tiemann, European Journal of Inorganic Chemistry (2017) 1026–1031.","chicago":"Weinberger, Christian, Zimei Chen, Wolfgang Birnbaum, Dirk Kuckling, and Michael Tiemann. “Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina.” European Journal of Inorganic Chemistry, 2017, 1026–31. https://doi.org/10.1002/ejic.201601364.","ieee":"C. Weinberger, Z. Chen, W. Birnbaum, D. Kuckling, and M. Tiemann, “Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina,” European Journal of Inorganic Chemistry, pp. 1026–1031, 2017, doi: 10.1002/ejic.201601364.","apa":"Weinberger, C., Chen, Z., Birnbaum, W., Kuckling, D., & Tiemann, M. (2017). Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina. European Journal of Inorganic Chemistry, 1026–1031. https://doi.org/10.1002/ejic.201601364","bibtex":"@article{Weinberger_Chen_Birnbaum_Kuckling_Tiemann_2017, title={Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina}, DOI={10.1002/ejic.201601364}, journal={European Journal of Inorganic Chemistry}, author={Weinberger, Christian and Chen, Zimei and Birnbaum, Wolfgang and Kuckling, Dirk and Tiemann, Michael}, year={2017}, pages={1026–1031} }","ama":"Weinberger C, Chen Z, Birnbaum W, Kuckling D, Tiemann M. Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina. European Journal of Inorganic Chemistry. Published online 2017:1026-1031. doi:10.1002/ejic.201601364","mla":"Weinberger, Christian, et al. “Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina.” European Journal of Inorganic Chemistry, 2017, pp. 1026–31, doi:10.1002/ejic.201601364."},"publication":"European Journal of Inorganic Chemistry","quality_controlled":"1","abstract":[{"text":"Dimethylacrylamide-based hydrogels were utilized as porogenic matrices in the synthesis of mesoporous aluminum oxide (γ-Al2O3) with specific BET surface areas up to 360 m2 g–1. Polymers with molecular mass in the range 12000–35000 g mol–1 were synthesized from dimethylacrylamide and various comonomers by free-radical polymerization. Photo-cross-linking of the polymers and impregnation with aluminum nitrate [Al(NO3)3] was carried out in a single step, followed by formation of Al(OH)3/AlO(OH) and subsequent calcination. Calcination led to the formation of mesoporous Al2O3 and simultaneous combustion of the hydrogel. The structural properties of the products were characterized by powder XRD, N2 physisorption analysis, Hg intrusion porosimetry, and thermogravimetric analysis.","lang":"eng"}],"_id":"25915","language":[{"iso":"eng"}],"page":"1026-1031","doi":"10.1002/ejic.201601364","user_id":"23547","publication_identifier":{"issn":["1434-1948"]},"author":[{"id":"11848","last_name":"Weinberger","first_name":"Christian","full_name":"Weinberger, Christian"},{"full_name":"Chen, Zimei","first_name":"Zimei","last_name":"Chen"},{"first_name":"Wolfgang","last_name":"Birnbaum","full_name":"Birnbaum, Wolfgang"},{"full_name":"Kuckling, Dirk","last_name":"Kuckling","first_name":"Dirk","id":"287"},{"id":"23547","full_name":"Tiemann, Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael"}],"year":"2017","title":"Photo-Cross-Linked Polydimethylacrylamide Hydrogels as Porogens for Mesoporous Alumina","status":"public","article_type":"original","date_updated":"2023-03-08T10:24:33Z","publication_status":"published"},{"doi":"10.3390/pr5040070","language":[{"iso":"eng"}],"article_number":"70","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2227-9717/5/4/70/pdf?version=1510132833"}],"article_type":"original","publication_status":"published","date_updated":"2023-03-08T10:25:25Z","publication_identifier":{"issn":["2227-9717"]},"author":[{"last_name":"Chen","first_name":"Zimei","full_name":"Chen, Zimei"},{"full_name":"Weinberger, Christian","last_name":"Weinberger","first_name":"Christian","id":"11848"},{"full_name":"Tiemann, Michael","first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","id":"23547"},{"full_name":"Kuckling, Dirk","first_name":"Dirk","last_name":"Kuckling","id":"287"}],"year":"2017","title":"Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"311"}],"type":"journal_article","date_created":"2021-10-08T10:53:18Z","abstract":[{"lang":"eng","text":"Dimethylacrylamide-based hydrogels were utilized as porogenic matrices in the synthesis of mesoporous aluminum oxide (γ-Al2O3) with specific BET surface areas up to 360 m2 g–1. Polymers with molecular mass in the range 12000–35000 g mol–1 were synthesized from dimethylacrylamide and various comonomers by free-radical polymerization. Photo-cross-linking of the polymers and impregnation with aluminum nitrate [Al(NO3)3] was carried out in a single step, followed by formation of Al(OH)3/AlO(OH) and subsequent calcination. Calcination led to the formation of mesoporous Al2O3 and simultaneous combustion of the hydrogel. The structural properties of the products were characterized by powder XRD, N2 physisorption analysis, Hg intrusion porosimetry, and thermogravimetric analysis."}],"publication":"Processes","user_id":"23547","_id":"25914","status":"public","oa":"1","quality_controlled":"1","citation":{"apa":"Chen, Z., Weinberger, C., Tiemann, M., & Kuckling, D. (2017). Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia. Processes, Article 70. https://doi.org/10.3390/pr5040070","ieee":"Z. Chen, C. Weinberger, M. Tiemann, and D. Kuckling, “Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia,” Processes, Art. no. 70, 2017, doi: 10.3390/pr5040070.","short":"Z. Chen, C. Weinberger, M. Tiemann, D. Kuckling, Processes (2017).","chicago":"Chen, Zimei, Christian Weinberger, Michael Tiemann, and Dirk Kuckling. “Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia.” Processes, 2017. https://doi.org/10.3390/pr5040070.","mla":"Chen, Zimei, et al. “Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia.” Processes, 70, 2017, doi:10.3390/pr5040070.","ama":"Chen Z, Weinberger C, Tiemann M, Kuckling D. Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia. Processes. Published online 2017. doi:10.3390/pr5040070","bibtex":"@article{Chen_Weinberger_Tiemann_Kuckling_2017, title={Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia}, DOI={10.3390/pr5040070}, number={70}, journal={Processes}, author={Chen, Zimei and Weinberger, Christian and Tiemann, Michael and Kuckling, Dirk}, year={2017} }"}},{"language":[{"iso":"eng"}],"_id":"25919","page":"39-43","user_id":"23547","doi":"10.1016/j.micromeso.2015.08.020","author":[{"full_name":"Weiss, Alexander","last_name":"Weiss","first_name":"Alexander"},{"last_name":"Reimer","first_name":"Nele","full_name":"Reimer, Nele"},{"full_name":"Stock, Norbert","last_name":"Stock","first_name":"Norbert"},{"id":"23547","last_name":"Tiemann","first_name":"Michael","orcid":"0000-0003-1711-2722","full_name":"Tiemann, Michael"},{"full_name":"Wagner, Thorsten","first_name":"Thorsten","last_name":"Wagner"}],"publication_identifier":{"issn":["1387-1811"]},"status":"public","year":"2016","title":"Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy","article_type":"original","publication_status":"published","date_updated":"2023-03-08T10:27:01Z","date_created":"2021-10-08T11:10:33Z","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"type":"journal_article","citation":{"mla":"Weiss, Alexander, et al. “Screening of Mixed-Linker CAU-10 MOF Materials for Humidity Sensing by Impedance Spectroscopy.” Microporous and Mesoporous Materials, 2016, pp. 39–43, doi:10.1016/j.micromeso.2015.08.020.","bibtex":"@article{Weiss_Reimer_Stock_Tiemann_Wagner_2016, title={Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy}, DOI={10.1016/j.micromeso.2015.08.020}, journal={Microporous and Mesoporous Materials}, author={Weiss, Alexander and Reimer, Nele and Stock, Norbert and Tiemann, Michael and Wagner, Thorsten}, year={2016}, pages={39–43} }","ama":"Weiss A, Reimer N, Stock N, Tiemann M, Wagner T. Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy. Microporous and Mesoporous Materials. Published online 2016:39-43. doi:10.1016/j.micromeso.2015.08.020","ieee":"A. Weiss, N. Reimer, N. Stock, M. Tiemann, and T. Wagner, “Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy,” Microporous and Mesoporous Materials, pp. 39–43, 2016, doi: 10.1016/j.micromeso.2015.08.020.","apa":"Weiss, A., Reimer, N., Stock, N., Tiemann, M., & Wagner, T. (2016). Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy. Microporous and Mesoporous Materials, 39–43. https://doi.org/10.1016/j.micromeso.2015.08.020","chicago":"Weiss, Alexander, Nele Reimer, Norbert Stock, Michael Tiemann, and Thorsten Wagner. “Screening of Mixed-Linker CAU-10 MOF Materials for Humidity Sensing by Impedance Spectroscopy.” Microporous and Mesoporous Materials, 2016, 39–43. https://doi.org/10.1016/j.micromeso.2015.08.020.","short":"A. Weiss, N. Reimer, N. Stock, M. Tiemann, T. Wagner, Microporous and Mesoporous Materials (2016) 39–43."},"publication":"Microporous and Mesoporous Materials","abstract":[{"text":"The sorption properties of mixed-linker CAU-10 type metal organic frameworks (MOFs), [Al(OH)(1,3-BDC-X)n(1,3-BDC-SO3H)m] with 1,3-BDC = 1,3-benzenedicarboxyliate, X = H, NO2 or OH, 0.76 ≤ n ≤ 0.89 and 0.11 ≤ m ≤ 0.24, can be varied by surface modification through variation of the respective linker molecules. It is thus possible to design surface-modified CAU-10 type MOFs with variable affinity and accessibility of the pores for water vapour. When used as a dielectric in a capacitor, the MOF material will change its permittivity depending on the amount of physisorbed water; this is the working principle of capacitive humidity sensors. Three different mixed-linker compounds with CAU-10 structure are compared regarding their water sorption and impedance characteristics. A setup was developed allowing the characterization of the MOF samples under exposure to different relative humidity values in air by impedance spectroscopy. Interpretation of the results by means of standard models shows that the MOFs are qualified for functional layers of capacitive humidity sensors. Since the prepared MOFs are more temperature-stable than many commonly used polymers they offer the potential to build a new generation of high-temperature (up to 350 °C) humidity sensors.","lang":"eng"}],"quality_controlled":"1"},{"main_file_link":[{"url":"https://pubs.rsc.org/en/content/articlepdf/2016/ta/c6ta07772b","open_access":"1"}],"language":[{"iso":"eng"}],"doi":"10.1039/c6ta07772b","year":"2016","title":"Selective surface modification in bimodal mesoporous CMK-5 carbon","publication_identifier":{"issn":["2050-7488","2050-7496"]},"author":[{"id":"11848","first_name":"Christian","last_name":"Weinberger","full_name":"Weinberger, Christian"},{"first_name":"X.","last_name":"Cao","full_name":"Cao, X."},{"first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","full_name":"Tiemann, Michael","id":"23547"}],"date_updated":"2023-03-08T10:26:30Z","publication_status":"published","article_type":"original","date_created":"2021-10-08T11:08:36Z","type":"journal_article","department":[{"_id":"35"},{"_id":"307"},{"_id":"2"}],"publication":"Journal of Materials Chemistry A","abstract":[{"lang":"eng","text":"Ordered, bimodal mesoporous CMK-5 carbon is prepared by using mesoporous SBA-15 silica as a structural mold. The carbon material is chemically modified by oxidative treatment with acidic persulfate solution. This leads to the creation of oxygen-containing functionalities at the pore walls of the carbon (up to 13 wt% oxygen), as confirmed by IR spectroscopy. The oxidative treatment is carried out before removal of the silica mold which ensures that only one of the two distinct modes of mesopores (namely, the intra-tubular pores) is affected; the other mode (inter-tubular pores) is protected from oxidation by the presence of the silica mold. This is proven by water vapor physisorption analysis. The oxidatively treated (intra-tubular) pores are significantly more polar and, hence, better wettable than the untreated (inter-tubular) pores."}],"page":"18426-18431","_id":"25917","user_id":"23547","status":"public","oa":"1","citation":{"mla":"Weinberger, Christian, et al. “Selective Surface Modification in Bimodal Mesoporous CMK-5 Carbon.” Journal of Materials Chemistry A, 2016, pp. 18426–31, doi:10.1039/c6ta07772b.","bibtex":"@article{Weinberger_Cao_Tiemann_2016, title={Selective surface modification in bimodal mesoporous CMK-5 carbon}, DOI={10.1039/c6ta07772b}, journal={Journal of Materials Chemistry A}, author={Weinberger, Christian and Cao, X. and Tiemann, Michael}, year={2016}, pages={18426–18431} }","ama":"Weinberger C, Cao X, Tiemann M. Selective surface modification in bimodal mesoporous CMK-5 carbon. Journal of Materials Chemistry A. Published online 2016:18426-18431. doi:10.1039/c6ta07772b","ieee":"C. Weinberger, X. Cao, and M. Tiemann, “Selective surface modification in bimodal mesoporous CMK-5 carbon,” Journal of Materials Chemistry A, pp. 18426–18431, 2016, doi: 10.1039/c6ta07772b.","apa":"Weinberger, C., Cao, X., & Tiemann, M. (2016). Selective surface modification in bimodal mesoporous CMK-5 carbon. Journal of Materials Chemistry A, 18426–18431. https://doi.org/10.1039/c6ta07772b","short":"C. Weinberger, X. Cao, M. Tiemann, Journal of Materials Chemistry A (2016) 18426–18431.","chicago":"Weinberger, Christian, X. Cao, and Michael Tiemann. “Selective Surface Modification in Bimodal Mesoporous CMK-5 Carbon.” Journal of Materials Chemistry A, 2016, 18426–31. https://doi.org/10.1039/c6ta07772b."},"quality_controlled":"1"},{"publication":"Microporous and Mesoporous Materials","citation":{"mla":"Weinberger, Christian, et al. “Assessment of the Density of (Meso)Porous Materials from Standard Volumetric Physisorption Data.” Microporous and Mesoporous Materials, 2016, pp. 53–57, doi:10.1016/j.micromeso.2015.10.027.","ama":"Weinberger C, Vetter S, Tiemann M, Wagner T. Assessment of the density of (meso)porous materials from standard volumetric physisorption data. Microporous and Mesoporous Materials. Published online 2016:53-57. doi:10.1016/j.micromeso.2015.10.027","bibtex":"@article{Weinberger_Vetter_Tiemann_Wagner_2016, title={Assessment of the density of (meso)porous materials from standard volumetric physisorption data}, DOI={10.1016/j.micromeso.2015.10.027}, journal={Microporous and Mesoporous Materials}, author={Weinberger, Christian and Vetter, Simon and Tiemann, Michael and Wagner, Thorsten}, year={2016}, pages={53–57} }","apa":"Weinberger, C., Vetter, S., Tiemann, M., & Wagner, T. (2016). Assessment of the density of (meso)porous materials from standard volumetric physisorption data. Microporous and Mesoporous Materials, 53–57. https://doi.org/10.1016/j.micromeso.2015.10.027","ieee":"C. Weinberger, S. Vetter, M. Tiemann, and T. Wagner, “Assessment of the density of (meso)porous materials from standard volumetric physisorption data,” Microporous and Mesoporous Materials, pp. 53–57, 2016, doi: 10.1016/j.micromeso.2015.10.027.","chicago":"Weinberger, Christian, Simon Vetter, Michael Tiemann, and Thorsten Wagner. “Assessment of the Density of (Meso)Porous Materials from Standard Volumetric Physisorption Data.” Microporous and Mesoporous Materials, 2016, 53–57. https://doi.org/10.1016/j.micromeso.2015.10.027.","short":"C. Weinberger, S. Vetter, M. Tiemann, T. Wagner, Microporous and Mesoporous Materials (2016) 53–57."},"abstract":[{"lang":"eng","text":"Characterization and application of (meso)porous materials often require information about the density of the respective samples. For example, the BET surface area is, by definition, normalized to the sample mass; hence, any comparison between samples of different composition needs to take into account their respective densities. Literature data on the densities of porous materials are scarce. Frequently, only bulk-phase densities are available which sometimes differ from those of porous samples, especially for amorphous systems, such as silica or carbon. The apparent density, i.e. the density of the sample excluding the gas-accessible pore volume, is typically determined by helium gas pycnometry utilizing specialized pycnometers. We demonstrate how to obtain the same data from standard N2 physisorption measurements as part of the regular measurement routine. We evaluate the method by reference measurements utilizing a non-porous reference sample (glass rod) to confirm the validity of the method. Then we present results on apparent density measurements of several mesoporous silica materials (MCM-41, MCM-48, SBA-15, KIT-6), mesoporous carbon (CMK-3, -5, -8, -9), and a variety of mesoporous metal oxides obtained by nanocasting."}],"quality_controlled":"1","date_created":"2021-10-08T11:09:42Z","type":"journal_article","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"year":"2016","title":"Assessment of the density of (meso)porous materials from standard volumetric physisorption data","status":"public","author":[{"id":"11848","first_name":"Christian","last_name":"Weinberger","full_name":"Weinberger, Christian"},{"full_name":"Vetter, Simon","last_name":"Vetter","first_name":"Simon"},{"id":"23547","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael","full_name":"Tiemann, Michael"},{"first_name":"Thorsten","last_name":"Wagner","full_name":"Wagner, Thorsten"}],"publication_identifier":{"issn":["1387-1811"]},"publication_status":"published","date_updated":"2023-03-08T10:27:33Z","article_type":"original","page":"53-57","language":[{"iso":"eng"}],"_id":"25918","user_id":"23547","doi":"10.1016/j.micromeso.2015.10.027"},{"oa":"1","citation":{"chicago":"Weiss, Alexander, Nele Reimer, Norbert Stock, Michael Tiemann, and Thorsten Wagner. “Surface-Modified CAU-10 MOF Materials as Humidity Sensors: Impedance Spectroscopic Study on Water Uptake.” Physical Chemistry Chemical Physics, 2015, 21634–42. https://doi.org/10.1039/c5cp01988e.","short":"A. Weiss, N. Reimer, N. Stock, M. Tiemann, T. Wagner, Physical Chemistry Chemical Physics (2015) 21634–21642.","ieee":"A. Weiss, N. Reimer, N. Stock, M. Tiemann, and T. Wagner, “Surface-modified CAU-10 MOF materials as humidity sensors: impedance spectroscopic study on water uptake,” Physical Chemistry Chemical Physics, pp. 21634–21642, 2015, doi: 10.1039/c5cp01988e.","apa":"Weiss, A., Reimer, N., Stock, N., Tiemann, M., & Wagner, T. (2015). Surface-modified CAU-10 MOF materials as humidity sensors: impedance spectroscopic study on water uptake. Physical Chemistry Chemical Physics, 21634–21642. https://doi.org/10.1039/c5cp01988e","bibtex":"@article{Weiss_Reimer_Stock_Tiemann_Wagner_2015, title={Surface-modified CAU-10 MOF materials as humidity sensors: impedance spectroscopic study on water uptake}, DOI={10.1039/c5cp01988e}, journal={Physical Chemistry Chemical Physics}, author={Weiss, Alexander and Reimer, Nele and Stock, Norbert and Tiemann, Michael and Wagner, Thorsten}, year={2015}, pages={21634–21642} }","ama":"Weiss A, Reimer N, Stock N, Tiemann M, Wagner T. Surface-modified CAU-10 MOF materials as humidity sensors: impedance spectroscopic study on water uptake. Physical Chemistry Chemical Physics. Published online 2015:21634-21642. doi:10.1039/c5cp01988e","mla":"Weiss, Alexander, et al. “Surface-Modified CAU-10 MOF Materials as Humidity Sensors: Impedance Spectroscopic Study on Water Uptake.” Physical Chemistry Chemical Physics, 2015, pp. 21634–42, doi:10.1039/c5cp01988e."},"quality_controlled":"1","_id":"25940","page":"21634-21642","user_id":"23547","status":"public","date_created":"2021-10-08T15:47:59Z","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"type":"journal_article","publication":"Physical Chemistry Chemical Physics","abstract":[{"lang":"eng","text":"Metal–organic frameworks (MOFs) are crystalline microporous materials with tunable chemical and physical properties. By combining various metal clusters with different interconnecting organic linkers, the pore structure, crystallinity, as well as the surface properties can be modified. In the present work, modification of the organic linker molecules is utilized to synthesize CAU-10 type MOFs with variable affinity of the pore surface to water. In principle, this should influence the accessibility of the pores for water vapor and therefore offer a tool to control its sorption properties. For a deeper understanding we studied the water sorption characteristics and compared the results to the conductive and dielectric properties studied by impedance spectroscopy. Spectra in a wide frequency range from 1 mHz to 1 MHz were recorded. Data analysis is performed using the Havriliak–Negami model. The MOFs are also tested as sensitive layers for capacitive humidity sensing by correlating the change in permittivity of the materials with the amount of physisorbed water. Such an MOF-based sensor was tested with respect to environmental monitoring and compared to a commonly used commercial humidity sensor."}],"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://pubs.rsc.org/en/content/articlepdf/2015/cp/c5cp01988e","open_access":"1"}],"doi":"10.1039/c5cp01988e","publication_identifier":{"issn":["1463-9076","1463-9084"]},"author":[{"full_name":"Weiss, Alexander","first_name":"Alexander","last_name":"Weiss"},{"full_name":"Reimer, Nele","last_name":"Reimer","first_name":"Nele"},{"first_name":"Norbert","last_name":"Stock","full_name":"Stock, Norbert"},{"full_name":"Tiemann, Michael","orcid":"0000-0003-1711-2722","first_name":"Michael","last_name":"Tiemann","id":"23547"},{"full_name":"Wagner, Thorsten","last_name":"Wagner","first_name":"Thorsten"}],"title":"Surface-modified CAU-10 MOF materials as humidity sensors: impedance spectroscopic study on water uptake","year":"2015","article_type":"original","date_updated":"2023-03-08T10:28:19Z","publication_status":"published"},{"user_id":"23547","page":"1431-1441","_id":"25939","status":"public","oa":"1","quality_controlled":"1","citation":{"ieee":"C. Weinberger, J. Roggenbuck, J. Hanss, and M. Tiemann, “Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices,” Nanomaterials, pp. 1431–1441, 2015, doi: 10.3390/nano5031431.","apa":"Weinberger, C., Roggenbuck, J., Hanss, J., & Tiemann, M. (2015). Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices. Nanomaterials, 1431–1441. https://doi.org/10.3390/nano5031431","chicago":"Weinberger, Christian, Jan Roggenbuck, Jan Hanss, and Michael Tiemann. “Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices.” Nanomaterials, 2015, 1431–41. https://doi.org/10.3390/nano5031431.","short":"C. Weinberger, J. Roggenbuck, J. Hanss, M. Tiemann, Nanomaterials (2015) 1431–1441.","mla":"Weinberger, Christian, et al. “Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices.” Nanomaterials, 2015, pp. 1431–41, doi:10.3390/nano5031431.","bibtex":"@article{Weinberger_Roggenbuck_Hanss_Tiemann_2015, title={Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices}, DOI={10.3390/nano5031431}, journal={Nanomaterials}, author={Weinberger, Christian and Roggenbuck, Jan and Hanss, Jan and Tiemann, Michael}, year={2015}, pages={1431–1441} }","ama":"Weinberger C, Roggenbuck J, Hanss J, Tiemann M. Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices. Nanomaterials. Published online 2015:1431-1441. doi:10.3390/nano5031431"},"doi":"10.3390/nano5031431","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2079-4991/5/3/1431/pdf?version=1440760886"}],"language":[{"iso":"eng"}],"date_updated":"2023-03-08T10:29:19Z","publication_status":"published","article_type":"original","title":"Synthesis of Mesoporous Metal Oxides by Structure Replication: Thermal Analysis of Metal Nitrates in Porous Carbon Matrices","year":"2015","publication_identifier":{"issn":["2079-4991"]},"author":[{"full_name":"Weinberger, Christian","first_name":"Christian","last_name":"Weinberger","id":"11848"},{"first_name":"Jan","last_name":"Roggenbuck","full_name":"Roggenbuck, Jan"},{"last_name":"Hanss","first_name":"Jan","full_name":"Hanss, Jan"},{"full_name":"Tiemann, Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","first_name":"Michael","id":"23547"}],"type":"journal_article","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"date_created":"2021-10-08T13:49:57Z","abstract":[{"lang":"eng","text":"A variety of metal nitrates were filled into the pores of an ordered mesoporous CMK-3 carbon matrix by solution-based impregnation. Thermal conversion of the metal nitrates into the respective metal oxides, and subsequent removal of the carbon matrix by thermal combustion, provides a versatile means to prepare mesoporous metal oxides (so-called nanocasting). This study aims to monitor the thermally induced processes by thermogravimetric analysis (TGA), coupled with mass ion detection (MS). The highly dispersed metal nitrates in the pores of the carbon matrix tend to react to the respective metal oxides at lower temperature than reported in the literature for pure, i.e., carbon-free, metal nitrates. The subsequent thermal combustion of the CMK-3 carbon matrix also occurs at lower temperature, which is explained by a catalytic effect of the metal oxides present in the pores. This catalytic effect is particularly strong for oxides of redox active metals, such as transition group VII and VIII metals (Mn, Fe, Co, Ni), Cu, and Ce."}],"publication":"Nanomaterials"},{"user_id":"23547","doi":"10.1016/j.snb.2014.09.021","page":"181-185","language":[{"iso":"eng"}],"_id":"25941","publication_status":"published","date_updated":"2023-03-08T10:28:39Z","article_type":"original","status":"public","year":"2015","title":"Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size","publication_identifier":{"issn":["0925-4005"]},"author":[{"first_name":"Dominik","last_name":"Klaus","full_name":"Klaus, Dominik"},{"full_name":"Klawinski, Danielle","first_name":"Danielle","last_name":"Klawinski"},{"last_name":"Amrehn","first_name":"Sabrina","full_name":"Amrehn, Sabrina"},{"id":"23547","full_name":"Tiemann, Michael","last_name":"Tiemann","first_name":"Michael","orcid":"0000-0003-1711-2722"},{"full_name":"Wagner, Thorsten","last_name":"Wagner","first_name":"Thorsten"}],"type":"journal_article","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"date_created":"2021-10-08T15:48:52Z","abstract":[{"text":"Ordered mesoporous In2O3 particles of variable size synthesized by the nanocasting method are used for preparation of resistive gas-sensing layers. Light activation by a LED (blue light, 460 nm) permits room-temperature ozone sensing. Apart from differences in base-line resistance in sensing layers containing small (diameter approx. 170 nm) or large particles (approx. 870 nm), differences in the response amplitude and response time constant are also observed. Signal stabilization is achieved faster for small particles. In addition, sensors show a particle size-dependent reaction threshold for low ozone concentration. Larger particles show negligible response to 50 ppb ozone whereas a significant response is observed for the small-particle sensors. A simple model based on geometrical properties and formation of depletion layers explaining the observed behavior is presented.","lang":"eng"}],"quality_controlled":"1","publication":"Sensors and Actuators B: Chemical","citation":{"mla":"Klaus, Dominik, et al. “Light-Activated Resistive Ozone Sensing at Room Temperature Utilizing Nanoporous In2O3 Particles: Influence of Particle Size.” Sensors and Actuators B: Chemical, 2015, pp. 181–85, doi:10.1016/j.snb.2014.09.021.","bibtex":"@article{Klaus_Klawinski_Amrehn_Tiemann_Wagner_2015, title={Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size}, DOI={10.1016/j.snb.2014.09.021}, journal={Sensors and Actuators B: Chemical}, author={Klaus, Dominik and Klawinski, Danielle and Amrehn, Sabrina and Tiemann, Michael and Wagner, Thorsten}, year={2015}, pages={181–185} }","ama":"Klaus D, Klawinski D, Amrehn S, Tiemann M, Wagner T. Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size. Sensors and Actuators B: Chemical. Published online 2015:181-185. doi:10.1016/j.snb.2014.09.021","ieee":"D. Klaus, D. Klawinski, S. Amrehn, M. Tiemann, and T. Wagner, “Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size,” Sensors and Actuators B: Chemical, pp. 181–185, 2015, doi: 10.1016/j.snb.2014.09.021.","apa":"Klaus, D., Klawinski, D., Amrehn, S., Tiemann, M., & Wagner, T. (2015). Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size. Sensors and Actuators B: Chemical, 181–185. https://doi.org/10.1016/j.snb.2014.09.021","chicago":"Klaus, Dominik, Danielle Klawinski, Sabrina Amrehn, Michael Tiemann, and Thorsten Wagner. “Light-Activated Resistive Ozone Sensing at Room Temperature Utilizing Nanoporous In2O3 Particles: Influence of Particle Size.” Sensors and Actuators B: Chemical, 2015, 181–85. https://doi.org/10.1016/j.snb.2014.09.021.","short":"D. Klaus, D. Klawinski, S. Amrehn, M. Tiemann, T. Wagner, Sensors and Actuators B: Chemical (2015) 181–185."}},{"user_id":"23547","doi":"10.1016/j.snb.2014.09.025","language":[{"iso":"eng"}],"_id":"25942","page":"133-138","article_type":"original","publication_status":"published","date_updated":"2023-03-08T10:29:53Z","publication_identifier":{"issn":["0925-4005"]},"author":[{"full_name":"Vetter, S.","first_name":"S.","last_name":"Vetter"},{"full_name":"Haffer, S.","last_name":"Haffer","first_name":"S."},{"last_name":"Wagner","first_name":"T.","full_name":"Wagner, T."},{"id":"23547","orcid":"0000-0003-1711-2722","first_name":"Michael","last_name":"Tiemann","full_name":"Tiemann, Michael"}],"status":"public","title":"Nanostructured Co3O4 as a CO gas sensor: Temperature-dependent behavior","year":"2015","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"type":"journal_article","date_created":"2021-10-08T15:50:03Z","abstract":[{"lang":"eng","text":"Cobalt oxide spinel (Co3O4) with an ordered nanostructure is used as a resistive gas sensor for carbon monoxide (CO) in low ppm concentrations. The operating temperature has a strong impact on the concentration-dependent sensing behavior. At lower temperature (473 K) the sensor response is governed mainly by surface coverage with CO and/or CO2, whereas at higher temperature (563 K) oxygen diffusion in the crystal lattice of Co3O4 strongly affects the sensing behavior."}],"quality_controlled":"1","citation":{"ieee":"S. Vetter, S. Haffer, T. Wagner, and M. Tiemann, “Nanostructured Co3O4 as a CO gas sensor: Temperature-dependent behavior,” Sensors and Actuators B: Chemical, pp. 133–138, 2015, doi: 10.1016/j.snb.2014.09.025.","apa":"Vetter, S., Haffer, S., Wagner, T., & Tiemann, M. (2015). Nanostructured Co3O4 as a CO gas sensor: Temperature-dependent behavior. Sensors and Actuators B: Chemical, 133–138. https://doi.org/10.1016/j.snb.2014.09.025","chicago":"Vetter, S., S. Haffer, T. Wagner, and Michael Tiemann. “Nanostructured Co3O4 as a CO Gas Sensor: Temperature-Dependent Behavior.” Sensors and Actuators B: Chemical, 2015, 133–38. https://doi.org/10.1016/j.snb.2014.09.025.","short":"S. Vetter, S. Haffer, T. Wagner, M. Tiemann, Sensors and Actuators B: Chemical (2015) 133–138.","mla":"Vetter, S., et al. “Nanostructured Co3O4 as a CO Gas Sensor: Temperature-Dependent Behavior.” Sensors and Actuators B: Chemical, 2015, pp. 133–38, doi:10.1016/j.snb.2014.09.025.","bibtex":"@article{Vetter_Haffer_Wagner_Tiemann_2015, title={Nanostructured Co3O4 as a CO gas sensor: Temperature-dependent behavior}, DOI={10.1016/j.snb.2014.09.025}, journal={Sensors and Actuators B: Chemical}, author={Vetter, S. and Haffer, S. and Wagner, T. and Tiemann, Michael}, year={2015}, pages={133–138} }","ama":"Vetter S, Haffer S, Wagner T, Tiemann M. Nanostructured Co3O4 as a CO gas sensor: Temperature-dependent behavior. Sensors and Actuators B: Chemical. Published online 2015:133-138. doi:10.1016/j.snb.2014.09.025"},"publication":"Sensors and Actuators B: Chemical"},{"publication":"Colloid and Polymer Science","citation":{"apa":"Birnbaum, W., Weinberger, C., Schill, V., Haffer, S., Tiemann, M., & Kuckling, D. (2014). Synthesis of mesoporous alumina through photo cross-linked poly(dimethylacrylamide) hydrogels. Colloid and Polymer Science, 3055–3060. https://doi.org/10.1007/s00396-014-3379-5","ieee":"W. Birnbaum, C. Weinberger, V. Schill, S. Haffer, M. Tiemann, and D. Kuckling, “Synthesis of mesoporous alumina through photo cross-linked poly(dimethylacrylamide) hydrogels,” Colloid and Polymer Science, pp. 3055–3060, 2014, doi: 10.1007/s00396-014-3379-5.","chicago":"Birnbaum, Wolfgang, Christian Weinberger, Verena Schill, Stefanie Haffer, Michael Tiemann, and Dirk Kuckling. “Synthesis of Mesoporous Alumina through Photo Cross-Linked Poly(Dimethylacrylamide) Hydrogels.” Colloid and Polymer Science, 2014, 3055–60. https://doi.org/10.1007/s00396-014-3379-5.","short":"W. Birnbaum, C. Weinberger, V. Schill, S. Haffer, M. Tiemann, D. Kuckling, Colloid and Polymer Science (2014) 3055–3060.","mla":"Birnbaum, Wolfgang, et al. “Synthesis of Mesoporous Alumina through Photo Cross-Linked Poly(Dimethylacrylamide) Hydrogels.” Colloid and Polymer Science, 2014, pp. 3055–60, doi:10.1007/s00396-014-3379-5.","ama":"Birnbaum W, Weinberger C, Schill V, Haffer S, Tiemann M, Kuckling D. Synthesis of mesoporous alumina through photo cross-linked poly(dimethylacrylamide) hydrogels. Colloid and Polymer Science. Published online 2014:3055-3060. doi:10.1007/s00396-014-3379-5","bibtex":"@article{Birnbaum_Weinberger_Schill_Haffer_Tiemann_Kuckling_2014, title={Synthesis of mesoporous alumina through photo cross-linked poly(dimethylacrylamide) hydrogels}, DOI={10.1007/s00396-014-3379-5}, journal={Colloid and Polymer Science}, author={Birnbaum, Wolfgang and Weinberger, Christian and Schill, Verena and Haffer, Stefanie and Tiemann, Michael and Kuckling, Dirk}, year={2014}, pages={3055–3060} }"},"abstract":[{"lang":"eng","text":"Catalysis plays a central role in many fields of life, e.g., in biochemical processes, to reduce energy costs and resources in chemical industry and to decrease or even avoid environmental pollution and in energy management. Porous alumina (Al2O3) is an essential material in various applications, especially as a support material for catalysts. It is often prepared by nanocasting using porous carbon materials that serve as rigid structure matrices. In this work, an alternative way to synthesize mesoporous Al2O3 by using hydrogels as porogenic material is presented. Hydrogels can easily be patterned by light and used to imprint their structure onto alumina opening a new approach to fabricate patterned Al2O3. The hydrogels used in this work are based on poly(dimethylacrylamide) and were photo-chemically cross-linked. Followed by a nanocasting process, mesoporous alumina samples were synthesized and characterized by N2 physisorption and X-ray diffraction. The cross-linker amount in the polymer network was varied and the influence on the properties of the Al2O3 is analyzed."}],"quality_controlled":"1","date_created":"2021-10-08T15:53:59Z","type":"journal_article","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"311"}],"year":"2014","status":"public","title":"Synthesis of mesoporous alumina through photo cross-linked poly(dimethylacrylamide) hydrogels","publication_identifier":{"issn":["0303-402X","1435-1536"]},"author":[{"first_name":"Wolfgang","last_name":"Birnbaum","full_name":"Birnbaum, Wolfgang"},{"first_name":"Christian","last_name":"Weinberger","full_name":"Weinberger, Christian","id":"11848"},{"full_name":"Schill, Verena","last_name":"Schill","first_name":"Verena"},{"first_name":"Stefanie","last_name":"Haffer","full_name":"Haffer, Stefanie"},{"full_name":"Tiemann, Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael","id":"23547"},{"last_name":"Kuckling","first_name":"Dirk","full_name":"Kuckling, Dirk","id":"287"}],"publication_status":"published","date_updated":"2023-03-08T10:31:46Z","article_type":"original","page":"3055-3060","_id":"25945","language":[{"iso":"eng"}],"user_id":"23547","doi":"10.1007/s00396-014-3379-5"}]