催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (10): 853-856.

• 研究论文 • 上一篇    下一篇

TiO2/AC复合光催化剂对苯和丁醛的气相光催化降解机理

张建臣1,郭坤敏2,马兰2,赵红阳2   

  1. 1 中国人民解放军防化指挥工程学院化学防护系, 北京 102205; 2 中国人民解放军防化研究院第一研究所, 北京 100083
  • 收稿日期:2006-10-25 出版日期:2006-10-25 发布日期:2010-11-28

Reaction Mechanisms for Gas-Phase Photocatalytic Degradation of Benzene and Butyraldehyde over TiO2/AC Composite Photocatalyst

ZHANG Jianchen1*, GUO Kunmin2, MA Lan2, ZHAO Hongyang2   

  1. 1 Department of Chemical Defense, Institute of Chemical Defense,The Chinese People's Liberation Army, Beijing 102205, China;2 The First Graduate School, Research Institute of Chemical Defense, The Chinese People's Liberation Army, Beijing 100083, China
  • Received:2006-10-25 Online:2006-10-25 Published:2010-11-28

PDF

804

被引次数

102

摘要： 利用溶胶-凝胶并水热处理法制备了TiO2光催化剂和TiO2/AC复合光催化剂,在静态光催化反应器中研究了苯和丁醛的气相吸附和光催化降解,利气相色谱分析确定了生成的中间体. 结果表明, TiO2/AC复合光催化剂比TiO2光催化剂具有较强的吸附能力和较高的光催化活性; 在TiO2和TiO2/AC上,苯(或丁醛)光催化降解产生相同的中间体,表明在两种催化剂上发生的光催化反应遵循相同的机理,进而讨论了其可能的光催化氧化途径.

关键词: 二氧化钛, 活性炭, 光催化剂, 苯, 丁醛, 降解, 反应机理

Abstract: The TiO2 photocatalyst and TiO2/AC composite photocatalyst were prepared by sol-gel and hydrothermal treatment methods. In a static photocatalytic reactor, the gas-phase adsorption and photocatalytic degradation of benzene and butyraldehyde over the two photocatalysts were studied, and the intermediates and products were detected by gas chromatography. The TiO2/AC composite photocatalyst had stronger adsorption capability and higher photocatalytic activity than the TiO2 photocatalyst. The intermediates and products were the same over TiO2 and TiO2/AC, which indicated that the photocatalytic degradation of benzene (or butyraldehyde) over the two catalysts followed the same mechanism. The possible photocatalytic oxidation pathways were discussed.

Key words: titania, activated carbon, photocatalyst, benzene, butyraldehyde, degradation, reaction mechanism