高可见光活性tio2bioi的制备及其光催化性能.docxVIP

高可见光活性TiO2-BiOI的制备及其光催化性能 黄凤萍1，2，崔梦丽1，2，郭宇煜1，2，辛萌1，2，刘博学1，2，周鑫敏1，2，丁力3 (1. 陕西科技大学 化学与化工学院，陕西 西安 710021；2.陕西省轻化工助剂重点实验室，陕西 西安710021；3. 咸阳陶瓷研究设计院，陕西 咸阳 712000） 摘要：以钛酸丁酯、亚氨基二乙醇、碘化钾和五水合硝酸铋为原料，通过溶剂热法将TiO2均匀地负载到BiOI花状微球上，制备了TiO2-BiOI复合光催化剂。通过XRD、FTIR、XPS、SEM、TEM和UV-vis-NIR对样品进行了表征。以甲基橙为目标降解物，测定了TiO2-BiOI复合光催化剂在可见光下的光催化性能。结果表明，纳米TiO2的加入为复合光催化剂比表面积的增加作出了贡献，TiO2与BiOI之间形成的异质结结构可以促进光生电子和空穴分离，从而达到提高复合光催化剂光催化性能的目的。n(Ti)/n(Bi)=0.4的TiO2-BiOI复合光催化剂表现出最佳的光催化降解性能，可见光（λ420 nm）照射60 min，其对甲基橙的降解率达到95%，远高于纯的TiO2和BiOI光催化剂。 关键词：溶剂热法；二氧化钛；碘氧化铋；可见光 中图分类号： O643.32 文献标志码：A Preparation and Photocatalytic Performance of TiO2-BiOI Photocatalyst with High Visible-Light Activity HUANG Feng-ping1, 2, CUI Meng-li1, 2, GUO Yu-yu1, 2, XIN Meng1, 2, LIU Bo-xue1, 2, ZHOU Xin-min1, 2, Ding Li3 (1. College of Chemistry and Chemical Engineering, Shaanxi University of Science Technology, Xian 710021, Shaanxi, China; 2. Shaanxi Key Laboratory of Chemical Additives for Industry, Xian 710021, Shaanxi, China; 3. Xianyang Research Design Institute of Ceramics, Xianyang 712000, Shaanxi, China) Abstract: TiO2-BiOI photocatalysts were prepared by solvothermal method using butyl titanate, diethanolimine, potassium iodide and bismuth nitrate pentahydrate as raw materials, in which TiO2 nanoparticles were loaded on BiOI flower microspheres. The obtained samples were characterized by XRD, FTIR, XPS, SEM, TEM and UV-vis-NIR spectrophotometer. The photocatalytic activity of TiO2/BiOI composite for the degradation of methyl orange (MO) was studied under visible light. The results showed that the addition of nano TiO2 contributed to the increase of specific surface area of composite. The heterogeneous structure formed between TiO2 and BiOI could promote the separation of photogenerated electrons and holes, which improved the photocatalytic performance of composite photocatalyst. It was found that When the molar ratio of Ti:Bi was 0.4, the sample had the highest photocatalytic activity for the degradation of MO und