树枝状Bi/TiO_2电化学合成及其光催化性能研究

Study on Electrochemical Synthesis and Photocatalytic Properties of Dendritic Bi/TiO_2

联合阳极氧化和电化学沉积的方法,在室温下合成了树枝状Bi/TiO_2纳米管复合催化剂。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和漫反射光谱仪(DRS)等手段对所制备的TiO_2纳米管、Bi/TiO_2复合催化剂形貌及结构进行了表征,并测试了它们的可见光光电流及光催化降解酸性橙II的效率。结果表明树枝状Bi/TiO_2纳米管复合催化剂在可见光区域表现出较强的光吸收性能,具有提高的可见光光电流与光催化活性。

Dendritic Bi/TiO2 composite catalyst is synthesized at room temperature via a electrochemical deposition and anodic oxidation method. Powder X - ray diffraction （XRD）, scanning electron microscopy （SEM） and diffuse reflectance spectroscopy （DRS） are used to characterize the phase and morphology of the prepared product. The visible light current and efficiency of photocatalytic degradation for acid orange II are tested. The results show that dendritic Bi/TiO2 nanotube composite catalysts have a strong optical absorption properties in the visible light region, and a higher visible light current and catalytic activity.