摘要
采用超声电化学阳极氧化法快速制得TiO2纳米管阵列,在一定范围内提高阳极氧化电压可以有效增大样品的管内径、壁厚和管长。在空气中经500℃煅烧6 h后,以高压汞灯为光源,20 V氧化电压制得的TiO2纳米管阵列电极表现出比10 V氧化电压电极更好的光电化学特性,其平均光电流密度可达5.6 mA/cm^2,光电压约为0.9 V/（SCE）。10 V和20 V氧化电压制得的TiO2纳米管阵列具有相近的平带电势,而后者具有相对较大的光电流和电荷载流子密度。
TiO2 nanotube arrays were quickly synthesized by sonoelectrochemical method in the anodizing solution of 0.5 M H3PO4 and 0.14 M NaF.Self-ordered arrays of TiO2 nanotubes can be growth effective by increasing the potential in a certain scale.Compared to 10 V sample, the 20 V sample which gave an average photocurrent density of 5.6 mA/cm2 at zero bias and the photo-voltage of about 0.9 V/sce with the light source of a 500 W high-pressure mercury lamp had greater photoelectrochemical properties.And the 10 V and 20 V samples showed approximate flat band potential,but the latter exhibited higher photocurrent and larger charge carrier density.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第8期1371-1374,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50806003)
北京市自然科学基金资助项目(No.3093018)
