Construction and photoelectrocatalytic properties of TiO2 nanotubes Arrays on titanium substrates

被引:0
作者
Liu Ping
Li Xin-Yong [1 ]
Wang Yu-Xin
Ju Xiao-Dong
Chen Guo-Hua
机构
[1] Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ, Sch Environm & Biol Sci & Technol, Dalian 116024, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China
来源
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2006年 / 27卷 / 12期
关键词
TiO2; nanotube electrode; photoelectrocatalysis; azo dye; degradation;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this paper, vertically aligned nanotubes arrays of titanium oxide were fabricated on the surface of titanium substrate by direct anode oxidation with HF being the supporting electrolyte. Under the condition of applying the same bias on the electrodes, a higher anodic photocurrent of the TiO2 nanotubes electrode was obtained than that of TiO2 film electrode, which is due to the larger specific surface area, novel microstructure and higher efficient surface-interface electron migration of nanotube electrode. The degradation of a textile azo dye, Acid Orange 7 (AO7), in aqueous solution with TiO2 nanotubes electrode was carried out using photoelectrocatalytic(PEC) process, comparing with electrochemical process(EP) and photocatalytic(PC). A significant photo-electrochemical synergetic effect was observed. The reason is attributed to the surface state characteristics and higher separation efficiency of photo-generated charge carrier of nanotube system.
引用
收藏
页码:2411 / 2413
页数:3
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