非水解溶胶-凝胶法制备TiO2薄膜及光电催化性能的研究

摘要： 性能．结果表明：不同涂覆层数的TiO2薄膜表面结构变化不大，TiO2呈锐钛矿．光电催化性能测试结果显示：甲基橙的脱色率随外加电压的增加而增加；甲基橙浓度的增加使脱色率逐渐降低；在酸性条件下脱色效果要好于中性和碱性条件下．在甲基橙的初始质量浓度为15mg／L，外加电压1500mV，pH为3时，甲基橙的脱色率约30min即可达到平衡，可达90％左右．

Photoelectrocatalytic Properties of Porous TiO2 Thin Film Prepared by Nonhydrolytic Sol-gel Method

Porous TiO2 film was prepared by nonhydrolytic sol-gel method,and was characterized by SEM,XRD and IR.The photoelectrocatalytic performance of porous thin film was also investigated.It was shown that TiO2 was anatase phase,and TiO2 film with different layers presented the similar morphology.The test results of photoelectrocatalytic performance indicated that both higher applied voltage and lower methyl orange initial concentration could increase the decolorization of methyl orange.The degradation of methyl orange in acidic solution was higher than that in neutral and alkaline conditions.When 1 500 mV of applied voltage was added on the 15 mg/L of methyl orange initial concentration at pH=3,the decolorization of methyl orange reached to equilibrium in 30 min and could approach to about 90 %.