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Bi2WO6/WO3/C异质结型复合光催化剂的制备及其性能
作者:刘成 杨占旭 
单位:辽宁石油化工大学化学化工与环境学部 辽宁 抚顺 113001 
关键词:钨酸铋 异质结 罗丹明B 光催化 
分类号:O644
出版年,卷(期):页码:2017,45(1):0-0
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(LR2015036)项目。
作者简介:
刘 成(1988—),男,硕士研究生。
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