新型催化剂BiOI粉末的低温制备及其光催化性能研究  

Low Temperature Preparation and Photocatalytic Activity Study of BiOI Powder

作　　者：徐坚[1,2] 刘亚子[1,2] 王莉琼[1,2] 叶帆[1] 

机构地区：[1]南京大学金陵学院环境科学与工程系,江苏南京210089 [2]南京大学环境学院污染控制与资源化国家重点实验室,江苏南京210023

出　　处：《环境保护科学》2015年第4期79-82,123,共5页Environmental Protection Science

基　　金：江苏省大学生创新创业训练计划项目(201313646005Y)基金资助

摘　　要：通过低温法制备Bi OI粉末,运用SEM、XRD和DRS对制备产物进行表征。结果显示Bi OI结晶度好、粒径小、比表面积大、可见光利用强。以甲基橙为主要目标物,对其在可见光下进行光催化降解研究。实验表明:在可见光下,p H=5.5,甲基橙初始浓度为20mg/L,Bi OI投加量为0.20g/L时,综合降解效果最好,210min光降解率可达80%;相同条件下,Bi OI降解直接黑、甲基紫、刚果红染料都有良好的效果,说明Bi OI拥有一定的应用前景。In this paper, photocatalyst of Bi OI powder was prepared at low temperature and characterized by SEM, XRD and DRS. The characterization results showed that the photocatalyst of Bi OI powder had good crystallinity and high utilization of visible light, with small particle size but large specific surface area. Then, methyl orange was used as the main target to study the catalytic performance of Bi OI under visible light. The experimental results showed that under visible light irradiation, when 0.20g/L of Bi OI was added into methyl orange solution of 20mg/L as initial concentration with the p H of 5.5, the removal rate of methyl orange reached to 80% after 210 minutes of reaction. Under the same conditions, Bi OI also had good performance in degradation of other dyes such as Direct Black, methyl violet and Congo red, indicating that Bi OI may have broad application prospect.

关 键 词：BiOI光催化剂 低温制备 表征 光催化 染料 

分 类 号：X131.2[环境科学与工程—环境科学] O643.36[理学—物理化学]