恒流阳极氧化法制备TiO_2光催化剂及其光电化学性能

Preparation and Photoelectrochemical Properties of TiO_2 Photocatalyst by Constant Current Anodization

以纯钛片为基体,在质量分数为1%的氢氟酸溶液中,采用恒电流阳极氧化法制备了TiO2光催化材料,利用FE-SEM、XRD、UV-Vis等方法对其微结构和光致特性等进行了表征,通过测定光电流-时间和光电压-电流等曲对TiO2的光电化学性能进行了研究,发现在氧化电流为0.15A条件下制得的TiO2结构均匀,光响应最灵敏,光电催化活性最佳。

TiO2 photocatalyst was prepared by anodizing pure Ti foils in the 1%（wt） HF solution at constant current. The structure and optical properties of the TiO2 samples were characterized by field emission scanning electron microscopy （FE-SEM）, X-ray diffraction （XRD） and UV-Vis absorption spectroscopy. Their photoelectrochemical properties were evaluated by means of photo-potential vs. time and photocurrent vs. time measurements. It was found that the TiO2 synthesized at 0.15 A had uniform structure and exhibited the highest photocatalytic activity and sensitive to light.