光催化还原法回收金属  

Recovery of Metals by Photocatalytic Reduction

作　　者：王谢菲[1] WANG Xie-fei(Jingdezhen No.2 Middle School,Jingdezhen 333000,Jiangxi Province,China)

机构地区：[1]景德镇二中,江西景德镇333000

出　　处：《景德镇学院学报》2020年第6期45-48,共4页Journal of JingDeZhen University

摘　　要：研究银离子、铜离子溶液以及银铜离子混合溶液中TiO2/beads光催化还原银铜的效果,考察pH值,电子给体,络合剂,不同的气氛下,单一以及复合体系对铜银还原效率的影响。结果表明:银铜离子的光催化还原与其电极电势以及在TiO2/beads催化剂表面的吸附有很大关系,pH值增大,光催化还原率增大,银的光催化还原程度比铜大,混合溶液中银铜离子的光催化还原具有协同效应,不同的给电子体,不同配体,不同的反应气氛下,均产生不同影响。This paper studies on photocatalytic reduction of silver and copper by TiO2/beads in silver ion,copper ion solution and mixed solution of silver and copper ion,and examines the influences of different factors,such as pH values,electron donor,ligand,different atmosphere,single system and mixed system on the reduction efficiency of copper and silver.The results show that photocatalytic reduction of silver and copper has much relation to their electrode potentials and surface adsorption on TiO2/beads.When pH value increases,the photocatalytic reduction rate does simultaneously.Efficiency of reduction of silver is higher than that of copper.Photocatalytic reduction of Ag+and Cu 2+in mixed system is synergistic.Different electron donor,ligand and atmosphere would generate different influences.

关 键 词：光催化 PH 银铜混合溶液 协同作用 

分 类 号：O644.1[理学—物理化学]