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Synthesis, characterization and catalytic activity of cryptomelane/montmorillonite composites
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SYSNO ASEP 0543216 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Synthesis, characterization and catalytic activity of cryptomelane/montmorillonite composites Author(s) Vaculíková, Lenka (UGN-S) RID, ORCID
Valovičová, Věra (UGN-S) RID
Plevová, Eva (UGN-S) RID, ORCID
Napruszewska, B. D. (PL)
Duraczyńska, D. (PL)
Karcz, R. (PL)
Serwicka, E. M. (PL)Number of authors 7 Article number 105977 Source Title Applied Clay Science. - : Elsevier - ISSN 0169-1317
Roč. 202, March 2021 (2021)Number of pages 9 s. Publication form Online - E Language eng - English Country NL - Netherlands Keywords cryptomelane/montmorillonite composite ; X-ray diffraction ; SEM/EDX ; infrared spectroscopy ; N2 adsorption/desorption ; catalytic combustion of VOCs Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry Method of publishing Limited access Institutional support UGN-S - RVO:68145535 UT WOS 000624973300006 EID SCOPUS 85099338132 DOI 10.1016/j.clay.2021.105977 Annotation Manganese oxides are considered to be highly effective catalysts for the oxidation of volatile organic compounds (VOCs). A series of MnO2 /montmorillonite composites was prepared to test their catalytic activity in the combustion of model compounds - toluene and ethanol. Several different types of montmorillonites (Mt), referred to as STx-1b, SWy-2, SAz-2, and Kunipia- F, were used to prepare the composites. The MnO2/Mt composites were synthetized in a weight ratio of 1:1, using the reaction between KMnO4 and HCl for the generation of the MnO2 component. Advanced techniques including XRD, SEM/EDS, IR spectroscopy, N2 adsorption /desorption, and H2 TPR were used for physico-chemical characterization of obtained materials. The MnO2 component precipitated as cryptomelane, the tunnel α-MnO2 structure. In catalytic tests, all composite samples were more active than the reference MnO2. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S0169131721000016?via%3Dihub
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