层状可调铁掺杂氮化碳及其光芬顿催化性能研究  

Study of tuning layered iron-doped carbon nitride and its catalytic performance in photo-Fenton system

作　　者：李琛[1] 周烈兴[2] 李雪梅 解林坤[1] 柴希娟[1] LI Chen;ZHOU Liexing;LI Xuemei;XIE Linkun;CHAI Xijuan(International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming 650224, China;Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China;College of Chemical Engineering, Southwest Forestry University, Kunming 650224, China)

机构地区：[1]西南林业大学国家生物质材料国际联合研究中心,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 [3]西南林业大学化学工程学院,云南昆明650224

出　　处：《大连理工大学学报》2022年第3期228-237,共10页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(31960297,31660179,31960296).

摘　　要：光芬顿反应是一种用于去除环境中有机污染物的高级氧化技术.通过两步法制备了一系列热剥离型铁掺杂g-C_(3)N_(4)(Fe-CN),考察了铁掺杂量和热剥离时间对Fe-CN结构、形貌的影响及其在中性多相芬顿体系中的催化降解性能.结果表明,铁离子被成功引入氮化碳的结构中,使氮化碳从致密的块状堆积结构转变为独特的木耳状片层介孔结构.Fe-CN在多相芬顿体系中表现出良好的光催化性能.其中,铁掺杂量为0.5%,热剥离时间为3 h时的样品0.5%Fe-3h的光催化效果最优,其在光催化体系、暗芬顿体系和光芬顿体系中,60 min时光催化降解亚甲基蓝(MB)溶液的降解率分别为72%、83%和99.8%,为纯CN的1.67、1.93和2.32倍.Photo-Fenton reaction is an advanced oxidation technology used to remove organic pollutants in the environment.A series of thermal exfoliated iron-doped g-C_(3)N_(4)(Fe-CN)is fabricated by a two-step method.The effects of iron doping amount and thermal exfoliation time on the structure and morphology of Fe-CN are investigated,as well as its catalytic degradation performance in the neutral heterogeneous Fenton system.The results show that iron ions are successfully introduced into the structure of carbon nitride,which transforms the compact bulk structure of carbon nitride into a unique agaric layered mesoporous structure.Fe-CN exhibits excellent photocatalytic performance in the heterogeneous Fenton system.Among them,0.5%Fe-3h sample with 0.5%of iron doping amount and 3 h of thermal exfoliation time shows the best photocatalytic performance.In photocatalytic system,dark-Fenton system and photo-Fenton system,the degradation rates of 0.5%Fe-3h for degrading Methylene Blue(MB)solution at 60 min are 72%,83%and 99.8%,which are 1.67,1.93 and 2.32 times of pure CN,respectively.

关 键 词：光芬顿 g-C_(3)N_(4) 层状可调 光催化 

分 类 号：TQ116[化学工程—无机化工]