菱形十二面体磷酸银的制备及其可见光催化性能研究  

Synthesis and visible-light photocatalytic performance of rhombic dodecahedral Ag_3PO_4

作　　者：马金玲[1] 牛晓君[1] 王杰[1] 伍健东[1] 

机构地区：[1]华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《化工新型材料》2017年第7期104-106,共3页New Chemical Materials

基　　金：污染控制与资源化研究国家重点实验室开放课题(PCRRF14006)

摘　　要：采用离子交换法,通过调控N,N-二甲基甲酰胺(DMF)与H_2O比例,制备出了具有可见光催化活性的菱形十二面体磷酸银。利用X射线衍射仪(XRD)、扫描电镜(SEM)、傅里叶红外光谱(FT-IR)和紫外-可见光谱仪(UV-Vis)等方法对催化剂进行了表征,并且考察了该催化剂的可见光催化性能。结果表明:通过调控DMF/H_2O比制备的菱形十二面体磷酸银晶型完整、形貌规则,对可见光的吸收增强。与无规则磷酸银相比较,菱形十二面体磷酸银表现出了较高的光催化活性,且DMF∶H_2O=5∶15为降解罗丹明B(Rh B)的最佳比例,超氧阴离子(·O_2^-)和空穴(h^+)为参与可见光催化降解Rh B的主要活性物种。The rhombic dodecahedral Ag3PO4 with visible-light photocatalytic activity was prepared by regulating DMF/H2O ratio using ion exchange method. The catalyst was characterized by XRD,SEM,FT-IR and UV-Vis,and the photocatalytic performance of catalyst under visible light was evaluated. The results indicated that the rhombic dodecahedral Ag3PO4 that prepared by regulating DMF/H2O ratio had complete polymorph,regular morphology and enhanced absorption of visible light. Compared with irregular Ag3PO4,the rhombic dodecahedral Ag3PO4 showed higher photocatalytic activity,and DMF∶ H2O = 5 ∶ 15 was the optimum ratio for the degradation of rhodamine B（ Rh B）. The superoxide anion（ ·O2^-） and holes（ h^＋） were the main active species that involved in the degradation of Rh B under visible light.

关 键 词：菱形十二面体磷酸银 N N-二甲基甲酰胺 可见光催化 罗丹明B 

分 类 号：O614.122[理学—无机化学] O643.36[理学—化学]