物理化学学报 >> 2001, Vol. 17 >> Issue (03): 286-288.doi: 10.3866/PKU.WHXB20010322

研究论文 上一篇    

氢处理二氧化钛的光催化性能及电化学阻抗谱

刘鸿;吴鸣;吴合进;孙福侠;郑云;李文钊   

  1. 中国科学院大连化学物理研究所,大连　116023
  • 收稿日期:2000-10-08 修回日期:2000-11-14 发布日期:2001-03-15
  • 通讯作者: 刘鸿 E-mail:hliu@dicp.ac.cn

Photocatalytic Activity and Electrochemical Impedance Spectroscopy of TiO2 Thermally Treated by Hydrogen

Liu Hong;Wu Ming;Wu He-Jin;Sun Fu-Xia;Zheng Yun;Li Wen-Zhao   

  1. Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian　116023
  • Received:2000-10-08 Revised:2000-11-14 Published:2001-03-15
  • Contact: Liu Hong E-mail:hliu@dicp.ac.cn

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关键词: 光催化, 二氧化钛, 电化学阻抗谱

Abstract: TiO2 treated in hydrogen atmosphere showed enhanced photocatalytic act ivity in degrading the sulfosalicylic acid (SSal).The results of the electrochem ical impedance spectroscopy (EIS) investigation showed that the diameters of the capacitive arcs for the HTiO2 were much smaller than those of bare TiO2 and t hermally treated TiO2 in air,indicating that the charge transfer of the HTiO2 occurs more rapidly,thus inviting a higher photocatalytic activity.When an exter nal bias was applied on the HTiO2,the arc of the EIS Nyquist plot decreased ob viously than without the bias,suggesting more efficient separation of the photo generated carriers.

Key words: Photocatalysis, Titanium dioxide, Electrochemical impedance spectro scopy