氯氧化铋-石墨烯复合材料的制备及光催化性能  

Preparation of BiOCl-graphene composites and their photocatalytic activity

作　　者：吴志敏[1] 蔡祥[1] 张丽[1] 吴婷[1] 

机构地区：[1]广东职业技术学院,广东佛山528041

出　　处：《印染》2015年第14期1-5,10,共6页China Dyeing and Finishing

基　　金：广东省2013年高等学校优秀青年教师培养计划资助项目(Yq2013173)

摘　　要：以氧化石墨烯(GO)和硝酸铋、氯化钾作为初始反应物,采用一步还原法制备氯氧化铋-还原氧化石墨烯(BiOCl-r GO)复合材料,并利用XRD、FTIR、SEM和TEM等手段对复合材料进行表征,同时探讨复合材料在可见光条件下对罗丹明B(Rh B)的光催化降解性能。结果表明,氧化还原石墨烯(rGO)能防止氯氧化铋的团聚,提高其活性;当rGO的质量分数为2%时,复合材料对RhB的光催化降解效果最佳,降解过程符合经典的准一级动力学模型。rGO并不直接参与光催化降解过程,BiOCl-rGO复合材料光催化活性增强,主要归因于rGO和BiOCl之间发生了化学键界面结合,提高了电子和空穴的分离效率。Bismuth oxychloride-reduced graphene oxide （BiOCI-rGO） composite is prepared by one-step reduction process with graphene oxide （GO）, Bi（NO3）3-5H20 and KCI as raw materials. BiOCI-rGO composite is characterized by XRD, FTIR, SEM and TEM. The photocatalytic degradation of Rhodamine B （RhB） by BiOCI-rGO composite under visible light condition is studied. The results show that rGO can prevent the agglomeration of bismuth oxychloride to improve its activity. BiOCI-rGO composite shows excellent effect on photocatalytic degradation of RhB with 2% of rGO which in line with the classic pseudo-first-order kinetics model, rGO is not directly involved in the process of photocatalytic degradation. The enhanced photocatalytic activity of BiOCI-rGO composite is mainly attributed to the chemical bonding between rGO and BiOCI interface, which improves the separation efficiency of electrons and holes.

关 键 词：印染废水 石墨烯 氯氧化铋 复合材料 光催化 

分 类 号：TB332[一般工业技术—材料科学与工程] O643.36[理学—物理化学]