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›› 2009, Vol. 9 ›› Issue (1): 171-175.

• 材料工程专栏 • 上一篇    下一篇

介孔氧化钛晶须气相光催化降解三氯乙烯

张建平 方维 李东 刘畅 杨祝红 陆小华   

  1. 南京工业大学材料化学工程国家重点实验室 南京工业大学材料化学工程国家重点实验室 中国科学院广州能源研究所 南京工业大学化工学院 南京工业大学材料化学工程国家重点实验室 南京工业大学化工学院
  • 收稿日期:2008-10-28 修回日期:2008-12-02 出版日期:2009-02-20 发布日期:2009-02-20
  • 通讯作者: 陆小华

Gas Phase Photocatalytic Oxidation of Trichloroethylene on Mesoporous TiO2 Whiskers

ZHANG Jian-ping LI Dong FANG Wei LIU Chang YANG Zhu-hong, LU Xiao-hua,   

  1. State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences College of Chemistry and Chemical Engineering, Nanjing University of Technology State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology College of Chemical Engineering, Nanjing University of Technology
  • Received:2008-10-28 Revised:2008-12-02 Online:2009-02-20 Published:2009-02-20
  • Contact: LU Xiao-hua,

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被引次数

22

摘要： 以水合氧化钛和K2CO3为原料合成了介孔TiO2晶须，表征结果显示，其为锐钛矿型，具有微米级形貌和较高的比表面积和均匀的孔径. 在波长为365 nm的紫外光下光催化降解三氯乙烯(TCE)，介孔TiO2晶须对TCE的降解率达到95%，高于Degussa P-25 TiO2粉末对TCE的降解率(87%)，具有更高的光催化氧化活性，降解速率随TCE初始浓度升高而加快，当空气流速为1.64 cm/s时转化速率最高，其中氧气加快了光催化反应，光催化反应符合Langmuir-Hinshelwood动力学方程.

关键词: 介孔TiO2, 气固相光催化, 三氯乙烯

Abstract: Anatase TiO2 whiskers were synthesized by the reaction of TiO2×nH2O and K2CO3. The analytical results showed that the product was anatase with the sizes within microns, high ratio of area to mass and good uniformity in apertures. The photocatalytic activity of mesoporous TiO2 for the oxidation of trichloroethylene (TCE) in gas phase was studied under irradiation of UV lamp at 365 nm wavelength. Its degradation rate was up to 95% catalyzed by mesoporous TiO2, which was higher than that of Degussa P-25 TiO2 (87%). The degradation rate of TCE was accelerated with increasing the initial concentration, which reached the highest rate when the air velocity was 1.64 cm/s, and O2 boosted the photocatalytic reaction rate. Finally, Langmuir-Hinshelwood model was used to describe the photocatalytic reaction.

Key words: mesoporous TiO2, gas-solid photocatalysis, trichloroethylene

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