中文摘要：

通过水热法制备了一种新型光催化剂BiOCl粉末,并采用X射线衍射（XRD）、扫描电子显微镜（SEM）和热重-差热分析（TG-DTA）对其进行表征。测试结果表明,BiOCl粉末呈四方晶型结构,由均一的片状微粒组成。BiOCl粉末在40～600℃的温度范围内结构保持稳定。以氙灯照射下的水中甲基橙为目标降解物,对BiOCl粉末的光催化活性进行研究,考察催化剂用量对光催化活性的影响,并将BiOCl与TiO2-P25的光催化性能进行比较。实验结果表明：BiOCl光催化剂的适宜用量为1.0g/L,在相同的实验条件下BiOCl催化剂的催化活性与TiO2-P25的相当。

英文摘要：

The BiOCl powders prepared by the hydrolysis method were investigated with the X-ray diffractometry（XRD）,scanning electron microscopy（SEM） and differential thermal analysis（TG？DTA）.The results show that the powders are of the tetragonal primitive crystal structure,composed of homogeneous particles of fine ferrite plates,and stable in the temperature range of 40？600 ℃.In addition,the photocatalytic activity of BiOCl powders was evaluated by methyl orange（MO） in aqueous solution illuminated by xenon-lamp,and the effect of the BiOCl amount on the photocatalytic activity was investigated.Moreover,the photocatalytic properties of BiOCl and TiO2-P25 were also compared.The results show that the favorite amount of BiOCl powders is 1.0 g/L for the MO degradation,and the photocatalytic activity of the BiOCl catalyst is comparable to the TiO2-P25 catalyst under the same experiment condition.