La和Zn掺杂铌酸铋的光催化降解性能及其机理
Photocatalytic Degradation Activity and Mechanism of Niobate Bismuth Nanoparticles Doped with La and Zn
作者单位E-mail
许青青 衢州学院化学与材料工程学院, 衢州 324000 xuqq33@163.com 
吕亮 衢州学院化学与材料工程学院, 衢州 324000  
叶冬菊 衢州学院化学与材料工程学院, 衢州 324000  
宋铠权 衢州学院化学与材料工程学院, 衢州 324000  
摘要: 用化学共沉淀法制备了镧和锌掺杂的铌酸铋纳米颗粒,表征了制备样品的微观结构和光催化降解性能。结果表明制备的样品对RhB表现出良好的可见光催化降解活性,且光催化效果受各种因素的影响。其中,Bi0.96La0.04NbO4用量为0.15 g时,对pH=4、50 mL浓度为5 mg·L-1 RhB溶液的光催化效果最佳。光催化机理研究表明催化剂在可见光照射下产生的电子空穴对RhB的降解起主要作用。该催化剂的制备方法简单、光催化性能稳定,5次循环后的活性仍大于95%。
关键词:     铌酸铋  罗丹明B  光催化
基金项目: 国家自然科学基金(No.2127116)、衢州市科技计划项目(No.2015Y001)和衢州市115人才工程培养人员(No.2014-2019)资助项目
Abstract: Niobate bismuth nanoparticles doped with La and Zn had been prepared by chemical co-precipitation method,and its structure and photocatalytic property were characterized by means of modern analytical techniques.The results illustrated that the doped BiNbO4 samples presented an excellent photocatalytic activity on RhB in visible light irradiation,and their photocatalytic efficiency influenced by various factors,0.15 g of Bi0.96La0.04NbO4 had the best photocatalytic effect on 50 mL of RhB solution with 5 mg·L-1 and 4 of pH.Especially,it had a stable photocatalytic performance and still retained the photocatalytic activity beyond 95% after five cycling test.The study on photocatalysis mechanism indicated that the electron holes play a significant role in the degradation process of RhB under visible light irradiation.
Keywords: La  Zn  niobate bismuth  Rhodamine B  photocatalysis
投稿时间:2017-01-02 修订日期:2017-04-09
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许青青,吕亮,叶冬菊,宋铠权.La和Zn掺杂铌酸铋的光催化降解性能及其机理[J].无机化学学报,2017,33(7):1205-1216.
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