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Solar light decomposition of warfare agent simulant DMMP on TiO2/graphene oxide nanocomposites
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SYSNO ASEP 0504449 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Solar light decomposition of warfare agent simulant DMMP on TiO2/graphene oxide nanocomposites Author(s) Henych, Jiří (UACH-T) SAI, RID, ORCID
Mattsson, A. (SE)
Tolasz, Jakub (UACH-T) RID, ORCID, SAI
Štengl, Václav (UACH-T) RID, ORCID, SAI
Österlund, L. (SE)Number of authors 5 Source Title Catalysis Science &Technology. - : Royal Society of Chemistry - ISSN 2044-4753
Roč. 9, č. 8 (2019), s. 1816-1824Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords dimethyl methylphosphonate ; reactive adsorption ; graphene oxide ; anatase TiO2 ; organophosphorus pesticides ; trimethyl phosphate ; cerium oxide Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Method of publishing Limited access Institutional support UACH-T - RVO:61388980 UT WOS 000465404200007 EID SCOPUS 85064631242 DOI 10.1039/c9cy00059c Annotation Solar light-induced photodecomposition of organophosphorus warfare agent simulant dimethyl methylphosphonate (DMMP) on the surfaces of TiO2/graphene oxide (GO) nanocomposites was studied by in situ DRIFT spectroscopy. Nanocomposites containing 1 and 2 wt% GO, respectively, were prepared by two different aqueous methods. All nanocomposites were shown to effectively adsorb and partly dissociate DMMP as shown by the formation of surface coordinated methoxy groups. Solar light illumination induced rapid decomposition of the adsorbed species to yield various ionic and surface coordinated formate and carbonate species as the main intermediate products. Both the kinetics of adsorbed species decomposition and the formation of various intermediates were strongly affected by the presence of GO, as compared to pure TiO2 nanoparticles. The two synthesis routes yielded nanocomposites with different degrees of reduction of GO that correlated with their reactivity towards DMMP adsorption and photodegradation. Upon illumination, rapid depletion of water was observed on the TiO2/GO nanocomposites and was attributed to a water splitting reaction, which competed with the DMMP photo-oxidation reaction. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2020 Electronic address https://pubs.rsc.org/en/content/articlelanding/2019/CY/C9CY00059C#!divAbstract
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