【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.更多还原

【Abstract】 By a simple coprecipitation process,a series of Ag3VO4 samples with crystalline particles from 100 nm to 5 μm 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.更多还原