Ag_3VO_4纳米粒子的合成及其对可见光下降解罗丹明B的催化活性  

Synthesis of Nanosized Ag_3VO_4 Particles and Their Photocatalytic Activity for Degradation of Rhodamine B under Visible Light

作　　者：张永来[1] 丁红[1] 刘福建[1] 魏舒[1] 刘森[1] 和东亮[1] 肖丰收[1] 

机构地区：[1]吉林大学化学学院无机合成与制备化学国家重点实验室,吉林长春130023

出　　处：《催化学报》2008年第8期783-787,共5页

基　　金：国家自然科学基金(20573044);国家重点基础研究发展计划(973计划2003CB615802)

摘　　要：利用一种简单共沉淀的方法,通过调变合成温度(0~80℃)成功地合成了一系列Ag3VO4样品,其粒子尺寸在100 nm^5μm间.通过在合成体系中添加聚乙二醇4000,Ag3VO4粒子尺寸可进一步降低至50~100 nm.可见光下降解罗丹明B的实验结果表明,Ag3VO4样品特别是纳米尺寸的样品,显示出比当前广泛使用的P25更高的催化活性.Ag3VO4样品循环使用4次之后其光催化活性并没有明显降低,证明Ag3VO4是一种稳定有效的可见光催化剂.By a simple coprecipitation process, a series of Ag3VO4 samples with crystalline particles from 100 nm to 5μm were successfully synthesized at temperatures of 0-80℃ . The addition of polyethyleneglycol in the synthetic system resulted in the formation of nanosized particles with 50-100 nm. The photocatalytic degradation of rhodamine B under visible light irradiation showed that the Ag3VO4 samples, particularly the nanosized Ag3VO4 sample, were much more active than the commercial photocatalyst titania P25. In addition, after 4 recycles, there was no significant decrease in the photocatalytic activity of Ag3VO4 samples, indicating that the Ag3VO4 was a stable photocatalyst for degradation of rhodamine B under visible light irradiation.

关 键 词：钒酸银 纳米粒子 光催化 可见光 罗丹明B 降解 

分 类 号：X703[环境科学与工程—环境工程]