Solar light decomposition of warfare agent simulant DMMP on TiO2/graphene oxide nanocomposites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F19%3A00504449" target="_blank" >RIV/61388980:_____/19:00504449 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2019/CY/C9CY00059C#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2019/CY/C9CY00059C#!divAbstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9cy00059c" target="_blank" >10.1039/c9cy00059c</a>

Result language
angličtina
Original language name
Solar light decomposition of warfare agent simulant DMMP on TiO2/graphene oxide nanocomposites
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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