催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (4): 323-327.

• 研究论文 • 上一篇    下一篇

负载型 Cu-BiVO4 复合光催化剂的制备及可见光降解气相甲苯

索静, 柳丽芬, 杨凤林   

  1. 大连理工大学环境与生命学院工业生态与环境工程教育部重点实验室, 辽宁大连 116024
  • 收稿日期:2009-04-25 出版日期:2009-04-25 发布日期:2013-01-21

Preparation of Supported Cu-BiVO4 Photocatalyst and Its Application in Oxi-dative Removal of Toluene in Air

SUO Jing, LIU Lifen*, YANG Fenglin   

  1. Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental and Biological Sci-ence and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2009-04-25 Online:2009-04-25 Published:2013-01-21

PDF

1572

被引次数

114

摘要： 以 P123 为软模板, 在 200 oC 采用水热法合成了 BiVO4 粉体, 再用浸渍法制备 Cu 改性 BiVO4 催化剂, 然后通过硅溶胶将其分散负载于金属不锈钢丝网上. 考察了催化剂负载量和 Cu 复合量对该样品在可见光下催化氧化去除气相甲苯效能的影响. 结果表明, 催化剂涂覆两层(负载量约为 2~2.2 mg/cm2, 以 SiO2, BiVO4 和 Cu 计), Cu 复合量为 5.0%时活性最高, 反应 5 h 后, 对初始浓度为 80 mg/m3 左右的甲苯最高去除率由纯 BiVO4 的 34% 提高到 90%. 采用 X 射线衍射、扫描电镜、X 射线光电子能谱和紫外-可见光谱等表征手段对催化剂的结构性质进行了表征. 结果表明, Cu 的复合使可见光吸收带发生红移, 吸收强度也有较大幅度的提高.

关键词: 铜, 钒酸铋, 光催化剂, 可见光, 甲苯, 降解

Abstract: A Cu-BiVO4 visible-light photocatalyst was prepared by impregna- tion of Cu(NO3)2 with hydrothermally prepared BiVO4. This composite after calcination and dispersion in a TEOS sol was immobilized onto stainless steel mesh. The removal rate of toluene is increased due to the hetero-junctions between CuO and BiVO4, and 5%Cu-BiVO4 has the highest activity.

Key words: copper, bismuth vanadate, photocatalyst, visible light, toluene, degradation