杂化Cu_2O/Cu纳米粒子的水相合成及强化光降解甲基橙的催化活性研究（英文）  

Enhanced Photocatalytic Activity of Cu_2O/Cu Heterogeneous Nanoparticles Synthesized in Aqueous Colloidal Solutions on Degradation of Methyl Orange

作　　者：陶平[1] 邵秘华[1] 宋成文[1] 吴帅华[1] 成慕荣 

机构地区：[1]大连海事大学环境科学与工程学院,辽宁大连116026

出　　处：《稀有金属材料与工程》2016年第9期2214-2218,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(21276035);Sub-project of Central Sharing Funds for Using Sea Area(2013-348-7);Special Foundation for Ocean Environmental Protection of Ocean and Fisheries Department of Liaoning Province(2012-Inhyhbc-0004,2012-Inhyhbc-0005);Scientific Research Project of Education Department of Liaoning Province(L2013203);Natural Science Foundation of Liaoning Province(2014025014)

摘　　要：为了优化Cu2O纳米粒子的光催化性能,以抗坏血酸作为还原剂、聚乙烯吡咯烷酮为表面活性剂,采用水相合成的方法通过调控反应温度制备出杂化Cu2O/Cu纳米粒子。利用SEM、XRD和N2吸附技术对Cu2O/Cu纳米粒子的形貌特征和结构性能进行表征。同时,也研究Cu2O/Cu纳米粒子催化降解甲基橙（MO）的效果和降解反应动力学。结果表明,制备的杂化Cu2O/Cu纳米粒子为＂鹅卵石＂形状,粒径尺寸范围在20～40 nm之间,与纯Cu2O粒子相比,杂化Cu2O/Cu粒子具有尺寸小、比表面积大的特点。由于杂化材料中引入了Cu纳米粒子,促进了Cu和Cu2O之间的界面电荷转移,使得Cu2O/Cu纳米粒子展现更优异的催化性能。Cu2O/Cu催化降解MO的反应符合一级动力学反应模型。经过4次循环使用后,杂化Cu2O/Cu仍然能表现出良好的催化活性。Heterogeneous Cu2O/Cu nanoparticles were synthesized by a colloidal chemistry approach using ascorbic acid as a reducing agent and polyvinylpyrrolidone as a surfactant. Morphology and structure of Cu2O/Cu nanoparticles were analyzed by SEM, XRD and N2 sorption techniques. The catalytic performances of Cu2O/Cu nanoparticles for the degradation of methyl orange（MO） were investigated and reaction kinetics of MO degradation over the catalyst was also studied. The results show that the heterogeneous Cu2O/Cu nanoparticles display cobblestone-like morphology with particle sizes ranging from 20 nm to 40 nm, which are slightly smaller in particle size and higher in BET surface areas than pure Cu2O. The Cu2O/Cu nanoparticles demonstrate good potential on degradation of MO because Cu nanoparticles in the Cu2O/Cu heterostructures promote the interfacial charge-transfer kinetics between Cu and Cu2O. High initial MO concentration produces low degree of MO degradation, and increases the reaction time to reach equilibrium, and the degradation reactions follow the pseudo-first-order kinetics model. The Cu2O/Cu catalyst still exhibit good catalytic activity after 4 photodegradation cycles of MO solutions.

关 键 词：氧化亚铜/铜 杂化光催化剂 降解 甲基橙 

分 类 号：O643.36[理学—物理化学]