Synthesis, characterization and catalytic activity of cryptomelane/montmorillonite composites

0543216 - ÚGN 2022 RIV NL eng J - Journal Article
Vaculíková, Lenka - Valovičová, Věra - Plevová, Eva - Napruszewska, B. D. - Duraczyńska, D. - Karcz, R. - Serwicka, E. M.
Synthesis, characterization and catalytic activity of cryptomelane/montmorillonite composites.
Applied Clay Science. Roč. 202, March 2021 (2021), č. článku 105977. ISSN 0169-1317. E-ISSN 1872-9053
Institutional support: RVO:68145535
Keywords : cryptomelane/montmorillonite composite * X-ray diffraction * SEM/EDX * infrared spectroscopy * N2 adsorption/desorption * catalytic combustion of VOCs
OECD category: Analytical chemistry
Impact factor: 5.907, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0169131721000016?via%3Dihub

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.
Permanent Link: http://hdl.handle.net/11104/0320481