Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (06): 1482-1486.doi: 10.3866/PKU.WHXB20110630

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Reduced Graphene Oxide-Modified Bi2WO6 as an Improved Photocatalyst under Visible Light

YING Hong1,2, WANG Zhi-Yong2, GUO Zheng-Duo2, SHI Zu-Jin2, YANG Shang-Feng1   

  1. 1. Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China;
    2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2011-01-18 Revised:2011-03-23 Published:2011-05-31
  • Contact: SHI Zu-Jin, YANG Shang-Feng E-mail:zjshi@pku.edu.cn; sfyang@ustc.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20771010, 20801052), National Key Basic Research Program of China (973) (2011CB932601), National High Technology Research and Development Program of China (863) (2007AA03Z311), and “100 Talents Program of Chinese Academy of Sciences” (A1010).

Abstract:

A new and improved photocatalyst, reduced graphene oxide (RGO)-modified Bi2WO6 (Bi2WO6-RGO), was synthesized by a two-step hydrothermal process. The effect of RGO content on photoactivity was investigated and the optimum mass ratio of RGO to Bi2WO6 was determined to be 1%. Based on scanning electron microscopic study, RGO does not change the structure and morphology of the Bi2WO6 photocatalyst. Therefore, the improvement in the photoactivity of the Bi2WO6-RGO composite is undoubtedly ascribed to RGO. The presence of graphene can facilitate the dissociation of photogenerated excitons, which leads to more O2·- to degrade dye pollutants like rhodamine-B (RhB). Moreover, the efficient adsorption of RhB molecules on graphene is another reason for the improved photoactivity.

Key words: Bi2WO6, Graphene, Hydrothermal process, Photocatalyst, Dye pollutant

MSC2000: 

  • O643