不锈钢丝网负载BiVO_4可见光光催化实验研究  

Research on visible light photocatalytic experiment of BiVO_4 films on stainless steel mesh

作　　者：代辉[1] 赵志超[1] 白玉兰[1] 宋祖伟[1] 

机构地区：[1]青岛农业大学化学与药学院,山东青岛266109

出　　处：《实验技术与管理》2016年第3期43-47,共5页Experimental Technology and Management

基　　金：山东省特色名校建设工程建设项目(XJG2013011);山东省特色名校建设工程课程教学研究项目(XJG2013125;XJG2013123)

摘　　要：以硝酸铋和偏钒酸铵为原料、无水乙醇为溶剂,采用溶剂热法在不锈钢丝网基底上负载BiVO_4薄膜。借助X射线衍射、扫描电镜对产物的晶型、组成及表面形貌进行了表征。结果表明,Bi的过量不利于得到组分单一的产物,而增加V的量则有利于制备纯的单斜相BiVO_4。同时,薄膜外观颜色随着Bi与V摩尔比n(Bi):n(V)的增加,逐渐变深。另外,溶剂热时间是薄膜微观形貌的控制因素。可见光光催化降解亚甲基蓝实验表明,当n(Bi):n(V)=1时,溶剂热时间为24h时制备的BiVO_4薄膜具有最高的光催化活性,且5次循环测试后,仍然具有较高的催化活性,表现出良好的循环使用性。该实验路线简单,原料易得,结果重复性高,可以便利的设计成材料类专业的综合性实验项目,利于培养学生实践动手能力。Bismuth vanadate films were firstly prepared on the stainless steel mesh by solvothermal method in absolute alcohol solvent with the bismuth nitrate and ammonium metavanadate as the starting materials.The results of XRD,SEM indicate that the excess of Bi is not good for forming pure product,and the increasement of V facilitates to obtain a monoclinic phase bismuth vanadate.In the meantime,the color of the films gradually becomes deep with the increase of molar ratio of Bi to V.Moreover,the solvothermal time is the main factor affecting the morphology of the films and their unit.The test results of photocatalytic degradation methylene blue solution show that when n（Bi）：n（V）is 1,the bismuth vanadate films obtained under the solvothermal condition for 24 hdisplay the optimal photocatalytic activity.And it shows the excellent cyclic stability after 5cycles.This experiment has many advantages such as simple route,readily available raw materials,and high reproducible results.It can be conveniently designed as a comprehensive experiment for the students majored in material chemistry,which is beneficial to develop students＇ practical ability.

关 键 词：BiVO_4薄膜 不锈钢丝网 溶剂热法 光催化性能 

分 类 号：G642.0[文化科学—高等教育学] TB383[文化科学—教育学]