ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2004,Vol.20>> Issue(07)>> 735-739     doi: 10.3866/PKU.WHXB20040714         中文摘要
Adsorption Behavior and Photooxidation Kinetics of OH- at TiO2 Thin Film Electrodes
Cao Jiang-Lin;Leng Wen-Hua;Zhang Jian-Qing;Cao Chu-Nan
Department of Chemistry, Zhejiang University, Hangzhou 310027
Full text: PDF (581KB) Export: BibTeX | EndNote (RIS)
The adsorption behavior and photooxidation kinetics of OH- at TiO2 thin film electrodes in solution of alcohols have been studied by electrochemical measurements. The results show that the adsorption model of OH- on TiO2 surface corresponds to the Langmuir isotherm and under high enough applied bias potential the photooxidation kinetics can be described by Langmuir-Hinshelwood expression. Hydroxide ions are regarded to be the reactant with photogenerated holes and adsorbed water could not be captured by the holes and, consequently, the photocurrent is proportional to the density of OH- adsorbed on TiO2 surface under the condition of high enough light intensity. In solution with high content of alcohols, the recombining reaction between radical and photogenerating electron can hardly occur, where the rate-limiting step is the formation of photo-driven OH• radical.

Keywords: Hydroxide ion   TiO2 thin film   Photooxidation kinetic   Langmuir isotherm  
Received: 2003-12-09 Accepted: 2004-03-19 Publication Date (Web): 2004-07-15
Corresponding Authors: Leng Wen-Hua Email:

Cite this article: Cao Jiang-Lin;Leng Wen-Hua;Zhang Jian-Qing;Cao Chu-Nan. Adsorption Behavior and Photooxidation Kinetics of OH- at TiO2 Thin Film Electrodes[J]. Acta Phys. -Chim. Sin., 2004,20 (07): 735-739.    doi: 10.3866/PKU.WHXB20040714
1. WANG Jing-Sheng, WANG En-Jun, YU Yan-Long, GUO Li-Mei, CAO Ya-An.Visible Light Photocatalytic Activity of an In-Doped TiO2 Thin Film with a Three-Dimensional Ordered Structure[J]. Acta Phys. -Chim. Sin., 2014,30(3): 513-519
2. WANG Yang, SHAO Xiang, WANG Bing.Preparation, Characterization and Photocatalytic Activity of Cr-Doped Rutile TiO2(110) Single Crystal Thin Films[J]. Acta Phys. -Chim. Sin., 2013,29(07): 1363-1369
3. CHEN Peng, TAN Xin, YU Tao.Effects of Total Pressure and Ar/O2 Flow Ratios on Photocatalytic Properties of TiO2 Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering[J]. Acta Phys. -Chim. Sin., 2012,28(09): 2162-2168
4. ZHENG Hua-Rong, WANG Xiao-Wei, LIN Xia-Hui, GENG Qiang, CHEN Xun, DAI Wen-Xin, WANG Xu-Xu.Promoted Effect of Polyethylene Glycol on the Photo-Induced Hydrophilicity of TiO2 Films[J]. Acta Phys. -Chim. Sin., 2012,28(07): 1764-1770
5. CHEN Dong-Po, ZHANG Xiao-Dan, WEI Chang-Chun, LIU Cai-Chi, ZHAO Ying.Effect of Blocking Layers Prepared by the Hydrolysis of TiCl4 Solution on the Photovoltaic Performance of a Dye-Sensitized Solar Cell[J]. Acta Phys. -Chim. Sin., 2011,27(02): 425-431
6. DAI Wen-xin; WANG Xu-xu; FU Xian-zhi; LIU Ping; LIN Hua-xiang.Effect of Halides on Photo-induced Hydrophilicity over TiO2 Films[J]. Acta Phys. -Chim. Sin., 2005,21(11): 1274-1279
7. Cui Xiao-Li;Jiang Zhi-Yu.Electrochemical Behavior of ITO/TiO2 Electrode under UV Illumination[J]. Acta Phys. -Chim. Sin., 2002,18(11): 1014-1017
8. Zhao Wen-Kuan;Fang You-Ling.Synthesis of Photocatalytic Activity TiO2 Thin Films at LowTemperature[J]. Acta Phys. -Chim. Sin., 2002,18(04): 368-371
9. Xiao Zhong-Dang, Huang Dan, Gu Jian-Hua, Lu Zu-Hong.X-ray Photoelectron Spectroscopy Study of the Deposition of TiO2 Thin Films on Self-assembly Monolayer[J]. Acta Phys. -Chim. Sin., 1998,14(01): 57-62
10. Yuan Feng,Li Tian-Kai,Shen Tao,Xu Hui-Jun.Photosensitization of the LB Films of Fluorescein Derivatives on n-TiO2 Film Electrode[J]. Acta Phys. -Chim. Sin., 1995,11(06): 526-531
Copyright © 2006-2016 Editorial office of Acta Physico-Chimica Sinica
Address: College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R.China
Service Tel: +8610-62751724 Fax: +8610-62756388
^ Top