Efficient degradation of orange II by ZnMn2O4 in a novel photo-chemical catalysis system  

作　　者：Qingzhuo Ni Hao Cheng Jianfeng Ma Yong Kong Sridhar Komarneni 

机构地区：[1]School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,China [2]Guangxi Key Laboratory of Green Processing of Sugar Resources,College of Biological and Chemical Engineering,Guangxi Science University of and Technology,Liuzhou 545006,China [3]Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology,Changzhou University,Changzhou 213164,China [4]Department of Ecosystem Science and Management and Materials Research Institute,The Pennsylvania State University,University Park,PA 16802,USA

出　　处：《Frontiers of Chemical Science and Engineering》2020年第6期956-966,共11页化学科学与工程前沿（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.21477009);Natural Science Foundation of Jiangsu Province(No.SBK2016021419);“333 project”of Jiangsu Province and the Opening Project of Guangxi Key Laboratory of Green Processing of Sugar Resources(No.GXTZY201803);One of us(SK)was supported by the College of Agricultural Sciences under Station Research Project No.PEN04566.

摘　　要：A ZnMn2O4 catalyst has been synthesized via a sucrose-aided combustion method and characterized by various analytical techniques.It is composed of numerous nanoparticles(15-110 nm)assembled into a porous structure with a specific surface area(SSA)o f 19.1 m^2.g^-1.Its catalytic activity has been investigated for the degradation of orange II dye using three different systems,i.e.,the photocatalysis system with visible light,the chemocatalysis system with bisulfite,and the photochemical catalysis system with both visible light and bisulfite.The last system exhibits the maximum degradation efficiency of 90%,much higher than the photocatalysis system(15%)and the chemocatalysis system(67%).The recycling experiments indicate that the ZnMn204 catalyst has high stability and reusability and is thus a green and eximious catalyst.Furthermore,the potential degradation mechanisms applicable to the three systems are discussed with relevant theoretical analysis and scavenging experiments for radicals.The active species such as Mn(III),o2^-,H^+,eaq,So4^- and Ho^-are proposed to be responsible for the excellent degradation results in the photo-chemical catalysis system with the ZnMn2o4 catalyst.

关 键 词：ZnMn2O4 photo-chemical catalysis BISULFITE dye degradation 

分 类 号：O64[理学—物理化学]