无表面活性剂条件下微波液相Cu2O合成及其光催化性能  

Microwave-assisted liquid phase synthesis of Cu2O without surfactant and its photocatalytic performance

作　　者：李伟超 周烈兴[2] 解林坤 秦永剑 柴希娟 LI Weichao;ZHOU Liexing;XIE Linkun;QIN Yongjian;CHAI Xijuan(School of Material Science and Engineering,Southwest Forestry University,Kunming 650224,China;Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]西南林业大学材料科学与工程学院,云南昆明650224 [2]昆明理工大学分析测试研究中心,云南昆明650093

出　　处：《大连理工大学学报》2019年第6期604-609,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(31660179)

摘　　要：在不添加任何表面活性剂的条件下,采用微波辅助液相还原法,以五水硫酸铜为铜源,葡萄糖为还原剂,通过调节葡萄糖的用量,制备了3种形貌的亚微米Cu2O材料,实现了球体、八面体和正方体形Cu2O超细晶颗粒的可控合成,利用XRD、TEM、SEM和光催化性能对Cu2O的微观结构、表面形貌进行了表征.由XRD分析可知,3种形貌的Cu2O纯度均很高.BET分析表明,球体Cu2O具有较高的BET比表面积,可以提供更多的活性位点,具有更高的降解能力.光催化降解亚甲基蓝(MB)的结果表明,3种形貌的Cu2O均表现出较高的光催化活性,在40 min时降解率均达94%以上.其中球体亚微米Cu2O颗粒对MB模拟废水的降解更为彻底,降解率达97%以上,其一级反应速率常数分别为八面体和正方体Cu2O的2.10倍和1.58倍.Spherical,octahedral and cube superfine-grained Cu2O particles were successfully synthesized by microwave-assisted liquid phase reduction method with copper sulfate pentahydrate as a copper source and glucose as a reducer without any surfactant addition.The effect of the volume of glucose on morphology of Cu2O was studied.The microstructure and morphology of Cu2O were characterized by XRD,TEM,SEM and photocatalytic properties.According to XRD analysis,the purities of three morphologies of Cu2O are very high.The BET data show spherical Cu2O has higher BET specific surface area,which can provide more active sites and show higher degradation performance.The degradation data on Methylene Blue(MB)indicate that three morphologies of Cu2O show high photocatalytic activity,and the degradation rates after 40 min are over 94%.The spherical Cu2O exhibits higher photocatalytic activities than the other two Cu2O,and the degradation efficiency is over 97%.The one-order kinetic constant of spherical Cu2O is 2.10 and 1.58 folds as large as that of octahedral Cu2O and cube Cu2O,respectively.

关 键 词：微波辅助 液相还原法 氧化亚铜 形貌控制合成 光催化降解 

分 类 号：X703.1[环境科学与工程—环境工程]