两步法制备亚胺类COF-Re及其光催化应用研究  

Preparation of imine COF-Re by two-step method and study on its photocatalytic application

作　　者：李杨松 李征[2] 李静 郝泽坤 杨秋生[3] LI Yang-song;LI Zheng;LI Jing;HAO Ze-kun;YANG Qiu-sheng(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;The First Design&Research Institute,North China Municipal Engineering Design&Research Institute,Tianjin 300074,China;School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国市政工程华北设计研究总院第一设计研究院,天津300074 [3]河北工业大学化工学院,天津300130

出　　处：《现代化工》2023年第2期123-127,共5页Modern Chemical Industry

基　　金：河北省住房和城乡建设厅科研项目(2014-230)。

摘　　要：采用两步法制备亚胺类COF-Re光催化剂,利用SEM、XRD和TGA等手段对COF-Re进行表征,并通过光催化降解甲基橙(MO)评价其光催化性能。结果表明,COF-Re具有良好的结晶度、规整的形貌和高比表面积。COF-Re质量浓度为150 mg/L、初始pH为4.5、模拟可见光照射120 min时,MO降解率达到98.1%。COF-Re重复使用3次,MO降解率仍达到88.5%,表现出较高的催化活性。降解机理研究表明,·O_(2)^(-)是降解MO的主要活性物质。COF-Re,an imine material,is prepared via a two-step heat-refluxing and solvothermal method,and characterized by means of scanning electron microscope(SEM),X-ray diffractometer(XRD)and thermal gravimetric analyzer(TGA).Its photocatalytic performance is evaluated through degrading methyl orange(MO)under the irradiation of visible light(λ>420 nm).It is shown that the prepared COF-Re has high crystallinity,uniform morphology and high specific surface area.The degradation rate of MO can reach 98.1%as the dosage of COF-Re is 150 mg·L^(-1),initial pH=4.5 and it has been Illuminated by simulated visible for 120 minutes.The degradation rate of MO can still reach 88.5%after three-time reuse of the same COR-Re,indicating a high activity.It is found from studying on the degradation mechanism that·O_(2)^(-)is the main active substance to degrade MO.

关 键 词：共价有机骨架 三嗪 光催化 甲基橙 降解 

分 类 号：X703[环境科学与工程—环境工程]