高等学校化学学报

高等学校化学学报

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可见光响应光催化剂BiYWO6的制备、表征及其完全分解水的研究

刘恢, 袁坚, 上官文峰   

  1. 上海交通大学燃烧与环境技术研究中心, 上海 200240
  • 收稿日期:2008-03-11 修回日期:1900-01-01 出版日期:2008-08-10 发布日期:2008-08-10
  • 通讯作者: 上官文峰

Preparation and Characterization of Novel Visible-light-driven BiYWO6 Photocatalyst and Its Application to Overall Water Splitting

LIU Hui, YUAN Jian, SHANGGUAN Wen-Feng*   

  1. Research Center for Combustion and Environment Technology, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2008-03-11 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10
  • Contact: SHANGGUAN Wen-Feng

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摘要： 制备了一种可见光响应的光催化剂BiYWO6, 该体系是Bi2WO6-Y2WO6的伪二元固溶体, 其禁带宽度为2.71 eV. 其负载了助催化剂后, 可在紫外光和可见光下完全分解水生成氢气和氧气, 其中负载RuO2助催化剂的BiYWO6具有最好的光催化活性. 通过对光催化反应前后的BiYWO6和助催化剂的表面各元素的化学状态的研究证实了RuO2/BiYWO6体系的稳定性. 比较分析了BiYWO6的能带结构, 认为可见光完全分解水的性能可归因于Y和Bi在固溶体BiYWO6中形成了合适的能带结构.

关键词: 光催化, 固溶体, 完全分解水, 可见光, 金属氧化物

Abstract: A new solid solution oxide BiYWO6(BYW)was prepared by solid state reaction at a high temperature and discovered to split water into H2 and O2 under visible light. The XPS results proved the stability of RuO2/Bi2WO6 in the photocatalytic reaction. RuO2 was the most suitable cocatalyst for BYW. Sacrificial reagents were used to confirm the photocatalytic ability of BYW. The formation of solid solution of Y2WO6 and Bi2WO6 was suggested to raise the bottom position of conduction band and to make Bi6s contribute to creating new valence band higher than that of O2p.

Key words: Photocatalysis, Solid solution, Overall water splitting, Visible light, Metal oxide

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