稀土La^(3+)掺杂Bi_2WO_6光催化降解活性艳红X-3B的研究  

Investigation of X-3B photocatalytic degradation by La^(3+) doped Bi_2WO_6

作　　者：王春英[1,2,3] 谷传涛[1] 朱清江[1] 阴梦如 罗仙平[1,3] 余长林[4] 

机构地区：[1]江西理工大学江西省矿冶环境污染控制重点实验室,江西赣州341000 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000 [3]西部矿业股份有限公司,青海西宁810001 [4]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《中国环境科学》2015年第7期2007-2013,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(51408277;21263005);江西省自然科学基金资助项目(20142BAB213019);江西理工大学矿业工程高水平学科经费资助项目(3304000008);江西理工大学博士启动基金(3401222090)

摘　　要：采用水热合成法制备稀土元素La3+掺杂Bi2WO6光催化剂并考察其对染料废水中活性艳红X-3B的光催化活性.通过X射线衍射、场发射扫描电镜、紫外-可见漫反射光谱、N2物理吸附-脱附等手段对合成材料的结构、形貌、光吸收等物理化学性能进行表征.结果表明,La3+掺杂量为5%时,其结晶度好、颗粒均匀、具有较强的可见光吸收性能,且比表面积比纯Bi2WO6提高30%以上,对X-3B的去除效果最好.另外,催化剂投加量、X-3B初始浓度、反应溶液p H等因素对La3+掺杂Bi2WO6光催化降解X-3B均有重要影响.Rare earth element La3＋ doped Bi2WO6 （La/Bi2WO6） was synthesized by hydrothermal method. Reactive brilliant red X-3B was used to as the objective pollutant to investigate the photocatalytic activity of La/Bi2WO6. The physicochemical properties of prepared materials were characterized by XRD, FESEM, UV-vis DRS and N2adsorption-desorption. As a result, La/Bi2WO6（5%） had the optimum photocatalytic activity to X-3B, which had good crystalinity, uniform particles, strong visible litght-responsible property and the higher SBET value with above 30% than pure Bi2WO6. Besides, the factors of the dosage of catalyst, initial concentration of X-3B, and pH values of the reaction solution all played important role on X-3B removal by La/Bi2WO6.

关 键 词：稀土掺杂 La/Bi2WO6 活性艳红X-3B 光催化降解 

分 类 号：X703.5[环境科学与工程—环境工程]