Citation: YING Hong, WANG Zhi-Yong, GUO Zheng-Duo, SHI Zu-Jin, YANG Shang-Feng. Reduced Graphene Oxide-Modified Bi₂WO₆ as an Improved Photocatalyst under Visible Light[J]. Acta Physico-Chimica Sinica, ;2011, 27(06): 1482-1486. doi: 10.3866/PKU.WHXB20110630 shu

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

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 Date: 18 January 2011
Available Online: 9 May 2011
Fund Project: 国家自然科学基金(20771010, 20801052) (20771010, 20801052) 国家重点基础研究发展规划项目(973) (2011CB932601)国家高技术研究发展计划项目(863)(2007AA03Z311) (973) (2011CB932601)国家高技术研究发展计划项目(863)(2007AA03Z311)中国科学院百人计划(A1010)资助 (A1010)

A new and improved photocatalyst, reduced graphene oxide (R )-modified Bi₂WO₆ (Bi₂WO₆-R ), was synthesized by a two-step hydrothermal process. The effect of R content on photoactivity was investigated and the optimum mass ratio of R to Bi₂WO₆ was determined to be 1%. Based on scanning electron microscopic study, R does not change the structure and morphology of the Bi₂WO₆ photocatalyst. Therefore, the improvement in the photoactivity of the Bi₂WO₆-R composite is undoubtedly ascribed to R . 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.
- Bi₂WO₆,
- Graphene,
- Hydrothermal process,
- Photocatalyst,
- Dye pollutant
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Reduced Graphene Oxide-Modified Bi₂WO₆ as an Improved Photocatalyst under Visible Light