期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 13, 期 29, 页码 13216-13221出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp20504h
关键词
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资金
- Special Foundation of President of Chinese Academy of Sciences
- National Science Foundation of China [10704051]
- Science and Technology Support Project of Jiangsu Province [BE2009643]
- Suzhou Nano-Special Project [ZXG0713]
- Chinese Academy of Sciences [KJCX2-YW-H21]
To elucidate the roles of graphene in photoelectric events and mass transfer during photocatalytic process is important for engineering graphene-semiconductor hybrid photocatalyst. Here, we demonstrated reduced graphene oxide (RGO) capturing dyes and photoinduced electrons during photocatalytic degradation of organic dyes in water. It captures dyes from water through adsorption and desorption irreversible hysteresis, and captures photoinduced electrons from semiconductor through surface junction. The RGO was attached to the surface of TiO2 in the form of surface wrapping. After one-step photocatalytic reduction of graphene oxide (GO) and TiO2 in ethanol-water solvent under UV irradiation, the RGO wrapped TiO2 hybrid (graphene-w-TiO2) photocatalyst was obtained. Using visible absorption spectroscopy, we also demonstrated these captured dyes were degraded during photocatalysis. The photocatalytic test showed the RGO significantly improved the photocatalytic activity of this hybrid photocatalyst.
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