TiO_2/BiOCl复合材料的合成及其光催化性能

The Synthesis of TiO_2/BiOCl Composites and Their Photocatalytic Properties

采用溶胶-凝胶法(Sol-Gel)法成功制备了TiO_2/BiOCl光催化复合材料。通过X射线衍射(XRD)、扫描电镜(SEM)及紫外-可见光谱(UV)等测试手段对其结构和性能进行了表征。对比研究了TiO_2和不同比例TiO_2/BiOCl复合材料降解罗丹明B废水的光催化性能。结果显示,在相同光照时间内,TiO_2和BiOCl摩尔比为5∶1时,表现出最佳的光催化性能。进行5次循环后,TiO_2/BiOCl对罗丹明B的催化降解率基本不变。

TiO_2/BiOCl photocatalytic composites were prepared by sol-gel method. Its structure and properties were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM) and ultraviolet-visible spectroscopy( UV). The photocatalytic properties of TiO_2 and the different proportions of TiO_2/BiOCl composite materials for Rh B wastewater degradation were comparatively studied. The results show that the photocatalytic activity is the best when the molar ratio of TiO_2 and BiOCl is 5∶ 1 in the same illumination time. The catalytic degradation rate of TiO_2/BiOCl to rhodamine B is almost unchanged after 5 cycles.