Dye-Sensitization-Induced Visible-Light Reduction of Graphene Oxide for the Enhanced TiO2 Photocatalytic Performance

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• 作者：Ping Wang ; Jin Wang ; Tingsen Ming ; Xuefei Wang ; Huogen Yu ; Jiaguo Yu ; Yonggang Wang ; Ming Lei
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：April 24, 2013
• 年：2013
• 卷：5
• 期：8
• 页码：2924-2929
• 全文大小：311K
• 年卷期：v.5,no.8(April 24, 2013)
• ISSN：1944-8252

文摘

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.

Keywords:

graphene; TiO₂-rGO; photocatalysis; dye-sensitization-induced; interface