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化学工业与工程 2016, Vol. 33 Issue (5) :1-7,20    DOI: 10.13353/j.issn.1004.9533.20141118
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可见光催化剂Ag/AgBr/(BiO)2CO3的制备、表征与催化性能
徐单单, 朱英明, 孟明
天津化学化工协同创新中心, 天津市应用催化科学与工程重点实验室, 天津大学化工学院, 天津 300072
Preparation, Characterization and Catalytic Performance of Visible-Light Photocatalyst Ag/AgBr/(BiO)2CO3
Xu Dandan, Zhu Yingming, Meng Ming
Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science & Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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摘要 

采用沉积沉淀法制备了一系列不同Ag/AgBr负载量的复合光催化剂Ag/AgBr/(BiO)2CO3,通过X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱和紫外-可见吸收光谱等表征手段对催化剂的晶体结构、形貌、组分、光吸收行为和能带结构等进行了系统分析并考察了该催化剂可见光下降解罗丹明B的性能。结果表明,该复合光催化剂相对于(BiO)2CO3在可见光下降解罗丹明B的活性有显著提高,Ag/AgBr的最适宜负载量为5.0%。活性提高的原因是复合光催化剂中3种组分间的协同作用提高了光生载流子的分离效率。

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徐单单
朱英明
孟明
关键词银纳米粒子;   溴化银;   次碳酸铋;   光催化剂;   可见光;   罗丹明B     
Abstract

A series of Ag/AgBr/(BiO)2CO3 composite photocatalysts with varying loadings of Ag/AgBr were firstly synthesized through deposition-precipitation. Multiple techniques including XRD, BET, SEM, TEM, XPS and UV-vis were used for catalyst characterization, and the photodegradation of Rhodamine B under visible-light was employed as a model reaction to evaluate their catalytic performance. It is found that the as-prepared composite catalysts Ag/AgBr/(BiO)2CO3 exhibit greatly enhanced catalytic activity as compared with (BiO)2CO3, the best loading content is 5.0%. The activity improvement is attributed to the synergy among Ag, AgBr and (BiO)2CO3, which improves the separation efficiency of photoinduced carriers.

KeywordsAg nanoparticle;   AgBr;   (BiO)2CO3   photocatalyst;   visible-light;   Rhodamine B     
Received 2014-05-18;
Fund:

国家自然科学基金(21276184,U1332102)和教育部博士点基金(20120032110014)。

Corresponding Authors: 孟明,E-mail: mengm@tju.edu.cn。     Email: mengm@tju.edu.cn
About author: 徐单单(1991-),女,硕士研究生。研究方向:环境催化。
引用本文:   
徐单单, 朱英明, 孟明.可见光催化剂Ag/AgBr/(BiO)2CO3的制备、表征与催化性能[J].  化学工业与工程, 2016,33(5): 1-7,20
Xu Dandan, Zhu Yingming, Meng Ming.Preparation, Characterization and Catalytic Performance of Visible-Light Photocatalyst Ag/AgBr/(BiO)2CO3[J].  Chemcial Industry and Engineering, 2016,33(5): 1-7,20
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