摘要
采用低温液相沉淀法和离子交换法制备溴化银@磷酸银/氧化石墨烯(AgBr@Ag_3PO_4/GO)光催化剂,采用场发射扫描电镜图(SEM)和X射线衍射分析(XRD)对其结构进行了表征,探讨了光催化降解染料机理。结果表明,光照35 min,AgBr@Ag_3PO_4/GO光催化剂对甲基橙染料的光催化降解率达到87. 8%,AgBr@Ag_3PO_4/GO光催化剂能隙为2. 25 e V,对应的吸收边为551 nm,光催化反应氧化性物种的贡献程度大小为h^+>O_2^-·>OH·,AgBr@Ag_3PO_4/GO光催化剂主要成分为高结晶度的磷酸银(Ag_3PO_4)和溴化银(AgBr)晶体,AgBr@Ag_3PO_4/GO光催化剂具有花瓣状多孔结构,氧化石墨烯吸附和包覆在AgBr@Ag_3PO_4表面。
Silver bromide@silver phosphate/graphen oxide(AgBr@Ag3PO4/GO) photocatalyst was prepared by low temperature liquid precipitation and ion exchange,and its structure was characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD).Mechanism of photocatalytic dye degradation was discussed.The results show that photocatalytic degradation of methyl orange could achieve 87.8% after 35 min illumination.The energy gap of AgBr@Ag3PO4/GO photocatalyst is 2.25 eV and the absorption edge is 551 nm.The ranking of contribution degree of photocatalytic reactive oxidative species is h^+>O2^-·>OH·.AgBr@Ag3PO4/GO photocatalyst is mainly composed of Ag3PO4 and AgBr with high crystallinities.AgBr@Ag3PO4/GO photocatalyst has petal porous structure and graphene oxide is adsorbed and coated on the surface of AgBr@Ag3PO4.
作者
陈浩
万涛
赖鑫林
蒋燕
卢智
黄正根
王春杰
徐舒蕊
CHEN Hao;WAN Tao;LAI Xin-lin;JIANG Yan;LU Zhi;HUANG Zheng-gen;WANG Chun-jie;XU Shu-rui(Collage of Materials and Chemistry ﹠ Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China;Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions,Chengdu University of Technology,Chengdu 610059,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2019年第2期139-142,共4页
China Plastics Industry
基金
四川省科技支撑计划项目(2014GZX0010)
四川省教育厅重点项目(14ZA0058)
成都市科技局项目(2014-HM01-00143-SF)
地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP2014Z008)
关键词
氧化石墨烯
磷酸银
溴化银
染料
光催化剂
降解
Graphene Oxide
Silver Phosphate
Silver Bromide
Dye
Photocatalyst
Degradation
