水资源与水工程学报

邹学军，董玉瑛 , 孙红杰，崔玉波.F/Ce掺杂Bi₂WO₆可见光光催化氧化甲基橙水资源与水工程学报[J].,2016,27(1):54-58

F/Ce掺杂Bi₂WO₆可见光光催化氧化甲基橙

Photocatalytic oxidation of methyl orange by F/Ce doping Bi₂WO₆ photocatalysts under visible light irradiation

DOI：10.11705/j.issn.1672-643X.2016.01.09

英文关键词:F/Ce doping Bi₂WO₆ photocatalytic oxidation methyl orange

基金项目:国家自然科学基金项目（21477001）；国家民委科研项目（14DLZ004）；中央高校基本科研专项资金项目（DC201502070302）

作者	单位
邹学军，董玉瑛 , 孙红杰，崔玉波	（大连民族大学环境与资源学院，辽宁大连 116600）

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中文摘要:

针对新型光催化剂Bi₂WO₆在可见光条件下光生电子-空穴分离效率低的问题，本文采用液固相水热反应的方法制备了F/Ce掺杂改性的Bi₂WO₆光催化剂。通过X射线粉末衍射(XRD)、扫描电镜(SEM)和紫外-可见漫反射(UV-vis DRS)等分析表明，F/Ce掺杂Bi₂WO₆光催化剂具有明显的层状结构，可有效降低电子-空穴的复合率，且改性后的Bi₂WO₆吸收波长发生红移。光催化氧化处理甲基橙降解实验结果表明：F和Ce共掺杂下Bi₂WO₆在可见光下具有最高的光催化活性，主要活性物质为羟基自由基（·OH），甲基橙的降解率在50 min后可以达到97%，催化活性比纯Bi₂WO₆提高了近2倍。本研究为研发水环境中高浓度有机废水，特别是难降解有机污染物的高效治理技术提供了基础数据。

英文摘要:

In the paper, F/Ce doping Bi₂WO₆ photocatalysts were successfully fabricated by one-pot simple hydrothermal method in order to enhance the separation efficiency of photo-induced electron-hole pairs of Bi₂WO₆. The as-prepared samples were characterized by XRD, SEM and DRS. The results showed that F/Ce doping Bi₂WO₆ has clear layered structure and can effectively improve the separation efficiency of electron-hole pairs and the Bi₂WO₆ of doped F and Ce caused red shift. The results showed that F/Ce doping Bi₂WO₆ had the highest photocatlytic activity under visible light irradiation.The main active substance is ·OH.The degradation of methyl orange can get 97% after reaction of 50 min. The photocatlytic activity of F/Ce doping Bi₂WO₆ increased by two times compared that with pure Bi₂WO₆.The result can provide basic data for high concentration organic wastewater, especially the high efficient treatment of refractory organic pollutants.

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