Photocatalytic activity of kaolinite

TitlePhotocatalytic activity of kaolinite
Publication TypeJournal Article
Year of Publication2011
AuthorsDaria Kibanova, Martin Trejo, Hugo Destaillats, Javiera Cervini-Silva
JournalCatalysis Communications
Date Published03/31/2011

The photocatalytic activity of commercial kaolinite (KGa-1b) was evaluated for the degradation of methylene blue (MB) in aqueous suspension and of toluene in the gas phase. An enhanced photolysis of MB in the presence of kaolinite was detected, albeit at a slower rate than in the presence of the same mass of commercial TiO2 P25. Toluene removal under realistic ambient concentrations was catalyzed by both KGa-1b and P25; however, on a TiO2 content normalized basis, the clay mineral showed a higher photocatalytic rate. In the latter case, toluene degradation was found to be coupled to the presence of kaolinite surfaces, and not proportional to TiO2 content.