Photoelectrocatalytic Degradation of Methylene Blue by TiO2 Nanotube Array Prepared by Anodic Oxidation

doi:10.3724/SP.J.1077.2009.00680

Abstract

Abstract:

TiO₂nanotube array material was prepared by anodic oxidation of a pure titanium sheet. The average length and the diameter of the nanotubes were 1.8μm and 80-90nm respectively. After calcination at 400℃ for 2h, the amorphous nanotube walls converted to anatase phase without distortion and collapse. The TiO₂ nanotube array material was used as photocatalyst to degrade methylene blue solution under UV light irradiation and UV lightelectric field respectively. The synergetic effects of UV light and electric field on the degradation of methylene blue were investigated by changing the voltage from 0V to +3V. The highest synergetic efficiency of 124% is obtained under +1.4V. The degradation activity of the TiO₂ nanotube array material used for several times decreases little, which reveals that the TiO₂ nanotube array is adhered to the metal substrate stably.

Key words: anodic oxidation, TiO₂ nanotube array, synergetic effect of UV light and electric field, methylene blue

CLC Number:

TQ426
X703

CHEN Yi,SHI Li-Yi,YUAN Shuai,WU Jun,ZHANG Mei-Hong,FANG Jian-Hui. Photoelectrocatalytic Degradation of Methylene Blue by TiO₂ Nanotube
Array Prepared by Anodic Oxidation[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00680.

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Photoelectrocatalytic Degradation of Methylene Blue by TiO₂ Nanotube
Array Prepared by Anodic Oxidation

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