Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 8, Pages 2924-2929Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am4008566
Keywords
graphene; TiO2-rGO; photocatalysis; dye-sensitization-induced; interface
Funding
- National Natural Science Foundation of China [61274129, 21277017, 51208396, 51102019, 51272031]
- 973 Program [2013CB632402, 2010CB923200]
- 863 Program [2012AA062701]
- natural science foundation of Hubei Province [2012FFB05002]
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The reduction of graphene oxide (GO) with a large-scale production has been demonstrated to be one of the key steps for the preparation of graphene-based composite materials with various potential applications. Therefore, it is highly required to develop a facile, green, and environmentally friendly route for the effective reduction of GO. In this study, a new and effective reduced method of GO nanosheets, based on the dye-sensitization-induced visible-light reduction mechanism, was developed to prepare reduced GO (rGO) and graphene-based TiO2 composite in the absence of any additional reducing agents. It was found that the dye-sensitization-induced reduction process of GO was accompanied with the formation of TiO2-rGO composite nanostructure. The photocatalytic experimental results indicated that the resultant TiO2-rGO nanocomposites exhibited significantly higher photocatalytic performance than pure TiO2 because of a rapid separation of photogenerated electrons and holes by the rGO cocatalyst.
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