阳极氧化温度对TiO_2纳米管双室光电特性与产氢性能的影响

使用阳极氧化法,在含氟乙二醇电解液体系中制备出高度有序的TiO2纳米管阵列,并将其运用于双室光电解池中,在无任何外加电压条件下制备氢气.通过光催化制氢及光电化学性能测试,系统性地研究了不同氧化温度对TiO2纳米管产氢速率,光电流密度与光电转化率的影响.实验结果表明,TiO2纳米管的光电催化性能受氧化温度影响,并随氧化温度的降低而升高.40℃下制备的TiO2纳米管产氢速率为0.8 m L/（cm^2·h）,当温度降低至15℃时,TiO2样品产氢速率升高至2.3 m L/（cm^2·h）,单位面积产氢量增加1.87倍.

Effect of Anodization Temperature on Hydrogen Production Performance of TiO2 Nanotubes in Two-compartment Photoelectrochemical Cell

The highly-ordered TiO2 nanotubes were fabricated by anodization in ethylene glycol-based electrolytes with Fions. The TiO2 nanotubes were successfully used for hydrogen production in a twocompartment photoelectrochemical（ PEC） cell without any external voltage. By photocatalytic hydrogen production and PEC performance testing,this paper systematically studied the influence of different anodization temperatures on hydrogen production rate,photocurrent density and photoelectric conversion rate. The experimental results showed that the photocatalytic performance of TiO2 nanotubes was affected by anodization temperature,and increased with decrease of anodization temperature. The TiO2 nanotube sample anodized at 40 ℃ had poor hydrogen production rate of 0. 8 m L /（ cm^2·h）.However,the hydrogen production rate increased to 2. 3 m L /（ cm^2·h） when the anodization temperature decreased to 15 ℃. The hydrogen production per unit area increased by 1. 87 times.