高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

不同紫外光源下MnO2对TiO2光催化活性的影响

巩亚敏1, 马子川1,2, 李顺军1, 张洁1, 刘敬泽2   

    1. 河北师范大学化学与材料科学学院,
    2. 生命科学学院, 石家庄 050016
  • 收稿日期:2008-05-12 修回日期:1900-01-01 出版日期:2008-11-10 发布日期:2008-11-10
  • 通讯作者: 马子川,刘敬泽

Influence of MnO2 on the Photocatalytic Activity of TiO2 Under Different UV Sources

GONG Ya-Min1, MA Zi-Chuan1,2*, LI Shun-Jun1, ZHANG Jie1, LIU Jing-Ze2*   

    1. College of Chemistry and Material Sciences,
    2. College of Life Science, Hebei Normal University, Shijiazhuang 050016, China
  • Received:2008-05-12 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
  • Contact: MA Zi-Chuan,LIU Jing-Ze

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摘要： 采用动力学方法研究了3种紫外光源下MnO2颗粒物对TiO2光催化活性的影响, 使用的光源包括UV365/28 W, UV302/16 W和UV254/25 W, 实验用的MnO2包括α-MnO2, β-MnO2和δ-MnO2. 实验结果表明, 当水悬浮液中有MnO2颗粒物存在时, 在UV365/28W和UV302/16W两种紫外光源下TiO2光催化剂会失活, 而在UV254/25W紫外光源下TiO2光催化剂能基本保持稳定. TiO2光催化剂的稳定性与使用的紫外光源的波长有关.

关键词: 二氧化钛, 二氧化锰, 失活, 光催化

Abstract: The influences of MnO2 particles on the photocatalytic activity of Degussa P-25 TiO2 were investigated with kinetical method under three kinds of UV sources, which are UV365/28 W, UV302/16 W and UV254/25 W. α-MnO2, β-MnO2 and δ-MnO2 were introduced in the experiment. The results show that TiO2 photocatalyst deactivates due to the presence of MnO2 particles under UV365/28 W and UV302/16 W, while the photocatalytic activity of TiO2 basically keeps stable photocatalysis activity under UV254/25 W. In conclusion, the stability of TiO2 photocatalyst is significantly related to the wavelength of UV sources.

Key words: TiO2, MnO2, Deactivation, Photocatalysis

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