硅酸盐学报

Bi2WO6/WO3/C异质结型复合光催化剂的制备、表征及其性能

作者：刘成杨占旭

关键词：Bi2WO6/WO3/C 异质结罗丹明B 光催化

分类号：O644

出版年,卷(期):页码：2017,45(1):90-95

DOI：10.14062/j.issn.0454-5648.2017.01.13

摘要：

乙二胺插层H2WO4并经高温碳化后，水热条件下与Bi2WO6复合，制备了Bi2WO6/WO3/C异质结光催化剂。采用X射线粉末衍射仪、紫外–可见漫反射光谱)，扫描电子显微镜对样品进行表征。以罗丹明B为目标降解物，考察了光催化剂的催化性能。结果表明：Bi2WO6/WO3/C异质结光催化剂性能明显优于纯Bi2WO6和WO3/C。这是由于异质结的存在，抑制了光生电子与空穴的复合；此外，光催化剂低的导带电势，也有利于光催化活性的提高。

?After intercalated by ethylenediamine, H2WO4 was mixed with Bi2WO6 under hydrothermal conditions to prepare Bi2WO6/WO3/C heterojunction photocatalysts. The Bi2WO6/WO3/C heterojunction photocatalyst samples as-synthesized were characterized by X–ray powder diffraction, ultraviolet–visual diffuse reflectance spectroscopy and scanning electron microscopy, respectively. The photocatalytic activity of the Bi2WO6/WO3/C heterojunction photocatalysts was investigated with Rhodamine B as a target degradation material. The results show that the photocatalytic activity of Bi2WO6/WO3/C heterojunction photocatalysts is superior to that of pure Bi2WO6 or WO3/C. The formation of heterojunction in Bi2WO6/WO3/C can suppress the recombination of the photogenerated electron–hole pairs, which results in an increase of photocatalytic activity. In addition, the lower conduction–band edge of Bi2WO6/WO3/C heterojunction photocatalysts also plays a constructive role in the enhanced photocatalytic efficiency.

基金项目：

国家自然科学基金项目(21401093)；辽宁省高等学校优秀科技人才支持计划项目(LR2015036，21671092)

作者简介：

刘成(1988—)，男，硕士研究生

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