AgBr/Ag_(3)PO_(4)复合材料可见光催化去除无机废水中的氨氮  

AgBr/Ag_(3)PO_(4)Composites for Photocatalytic Removal of Ammonia Nitrogen in Inorganic Wastewater under Visible Light Irradiation

作　　者：罗嘉宏 张刚[1] 史伟 LUO Jiahong;ZHANG Gang;SHI Wei(School of Environment,South China Normal University,Guangzhou 51006,China;School of Environment and Energy,South China University of Technology,Guangzhou 51006,China)

机构地区：[1]华南师范大学环境学院,广州510006 [2]华南理工大学环境与能源学院,广州510006

出　　处：《华南师范大学学报（自然科学版）》2023年第5期65-71,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(51578249)。

摘　　要：采用简单的沉淀法制备复合型AgBr/Ag_(3)PO_(4)光催化材料,并通过X射线衍射(XRD)、场发射扫描电子显微镜(SEM)对其进行表征分析。探究废水初始pH、光源、通氧量和基团捕获剂对AgBr/Ag_(3)PO_(4)去除无机废水氨氮性能的影响。结果表明:在60 W的LED灯照射下,当初始pH为10.0、氨氮初始质量浓度为100 mg/L、氧气流量为0.2 mL/min,AgBr/Ag_(3)PO_(4)(质量分数60%)对无机废水氨氮的光催化去除率最高可达79%,且大部分氨氮转化为氮气,所以AgBr/Ag_(3)PO_(4)复合材料光催化去除无机废水氨氮的性能优异。羟基自由基·OH是该光催化反应的主要活性物质。The composite of AgBr/Ag_(3)PO_(4)photocatalytic materials prepared by simple precipitation method were characterized and analyzed by X-ray powder diffraction(XRD)and field emission scanning electron microscope(SEM).A series of experiments were conducted to explore the effects of initial pH,oxygen flow and scavenger on the photocatalytic remove of ammonia nitrogen in inorganic wastewater by the composite of AgBr/Ag 3PO 4 photocatalytic materials.The results of experiments and analysis show that:under the irradiation of 60 W LED lamp,when the initial pH was 10.0,the initial concentration of ammonia nitrogen in the wastewater was 100 mg/L,and the oxygen flux was 0.2 mL/min,the photocatalytic removal rate of AgBr/Ag_(3)PO_(4)(60%)for inorganic wastewater ammonia nitrogen can be up to 79%,and most ammonia nitrogen was converted to nitrogen.Therefore,AgBr/Ag_(3)PO_(4)composite has excellent performance in removing ammonia nitrogen from inorganic wastewater by photocatalysis.The hydroxyl free radical·OH is the main active substance in the photocatalytic reaction.

关 键 词：光催化 磷酸银 氨氮 

分 类 号：X703[环境科学与工程—环境工程]