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.
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 ( electrocatalytic ( PEC ) AO7), in aqueous solution with TiO2 nanotubes electrode was carried out using photoprocess, 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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第12期2411-2413,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:29977003)
辽宁省科技基金(批准号:20022142)资助.