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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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异质结构AgCl/Bi2WO6微米球制备、表征及其光催化性能
DOI: 10.1016/S1872-2067(15)60849-X, PP. 987-993
Keywords: 纳米微球,氯化银,钡酸铋,异质结构,光催化,罗丹明B
Abstract:
？首先利用水热法制备了由纳米片组装的粒径为1.5-2μm的Bi2WO6微球,然后在微球表面沉积了不同含量的AgCl(5wt%,10wt%,20wt%,30wt%),制备了异质结构AgCl/Bi2WO6微球光催化剂.利用X射线粉末衍射、扫描电镜、透射电镜、红外光谱、紫外-可见漫反射吸收等手段对所制的光催化剂进行表征,并以紫外光和可见光分别为光源,罗丹明B为降解对象测试了其光催化活性,考察复合不同含量的AgCl对Bi2WO6光催化剂的性能影响.结果表明,沉积AgCl对Bi2WO6的晶体结构、表面性能和光吸收性能没有产生明显影响,但大幅度提高了Bi2WO6的紫外和可见光催化活性.当复合20wt%AgCl时,AgCl/Bi2WO6光催化活性最佳,紫外光下比纯Bi2WO6提高了2.2倍,可见光下提高了1倍.这主要是由于形成的AgCl/Bi2WO6异质结能有效抑制光生电子和空穴的复合,从而提了其光催化性能.
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