Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 8, 2019
Previous Article Next Article

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

Author affiliations

Abstract

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.

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

Back to tab navigation

Article information


Submitted
10 Jan 2019
Accepted
05 Mar 2019
First published
06 Mar 2019

Catal. Sci. Technol., 2019,9, 1816-1824
Article type
Paper

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

J. Henych, A. Mattsson, J. Tolasz, V. Štengl and L. Österlund, Catal. Sci. Technol., 2019, 9, 1816
DOI: 10.1039/C9CY00059C

Social activity

Search articles by author

Spotlight

Advertisements