ZnO-CeO_(2)/g-C_(3)N_(4)三元复合催化剂的制备及其对活性红195的光催化降解性能  

Preparation of ZnO/CeO_(2)/g-C_(3)N_(4)ternary composite catalyst and its photocatalytic degradation capability to active red 195

作　　者：沈拥军 范凯霞[2] 陈银[2] 房帅康 徐浩 王煊轩 SHEN Yongjun;FAN Kaixia;CHEN Yin;FANG Shuaikang;XU Hao;WANG Xuanxuan(School of Chemical Engineering and Materials,Changzhou Institute of Technology,Changzhou 213032,China;School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China)

机构地区：[1]常州工学院化工与材料学院,江苏常州213032 [2]南通大学化学化工学院,江苏南通226019

出　　处：《化工环保》2023年第2期234-240,共7页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金项目(21246010);江苏省高等学校基础科学(自然科学)研究重大项目(22KJA610001);南通市科技项目(JC2021163);江苏省大学生创新创业训练计划项目(202211055048Y,202113993012Y,202113993013Y)。

摘　　要：采用热聚合法和水热法制备了ZnO-CeO_(2)/g-C_(3)N_(4)三元复合催化剂,并以活性红195为目标污染物进行了光催化降解实验。表征结果显示,CeO_(2)和ZnO被成功负载到g-C_(3)N_(4)表面。实验结果表明:当Ce(NO_(3))_(3)·6H_(2)O投加量为0.11 g时制备的催化剂光催化性能最佳,紫外光下反应60 min活性红195的去除率可达91.7%,优于CeO_(2)/g-C_(3)N_(4);酸性条件有利于活性红195的降解,最佳溶液pH为3.0。ZnO-CeO_(2)/g-C_(3)N_(4)三元复合材料中任意两种组分之间带隙错开,形成了Ⅱ型异质结构,增强了光生电子-空穴的分离效率,可诱导更多的活性物质参与光降解过程。The ZnO-CeO_(2)/g-C_(3)N_(4)ternary composite catalyst was prepared by thermal polymerization and hydrothermal methods,and the photocatalytic degradation experiments were carried out with reactive red 195 as the target pollutant.The characterization results indicate that CeO_(2)and ZnO are successfully loaded on g-C_(3)N_(4)surface.The experimental results show that:When Ce(NO_(3))_(3)·6H_(2)O dosage is 0.11 g,the ternary catalyst prepared has the best photocatalytic performance,and the removal rate of reactive red 195 can reach 91.7%after 60 min of reaction under ultraviolet light,which is higher than that over CeO_(2)/g-C_(3)N_(4);Acid conditions are conducive to the degradation of reactive red 195,the optimal pH is 3.0.The excellent catalytic activity is due to the staggered band gap between any two components in the ternary composite,forming a typeⅡheterojunction,which enhances the separation efficiency of photogenerated electron-hole and induces more active substances to participate in the photodegradation process.

关 键 词：ZnO-CeO_(2)/g-C_(3)N_(4) 三元催化剂 光催化 活性红195 水热法 

分 类 号：X791[环境科学与工程—环境工程]