AgI/MOF-253的制备及其可见光催化性能研究  

Synthesis of AgI/MOF-253 and study on its photocatalytic performance

作　　者：李从 王瑶[1,2] 孙志超 王安杰[1,2] 遇治权[1,2] 刘颖雅 LI Cong;WANG Yao;SUN Zhi-chao;WANG An-jie;YU Zhi-quan;LIU Ying-Ya(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024 [2]大连理工大学精细化工国家重点实验室,辽宁大连116024

出　　处：《现代化工》2021年第1期82-87,共6页Modern Chemical Industry

基　　金：国家重点研发计划(2016YFE0109800);国家自然科学基金(21972014,21473017,21603024和U1508205);中央高校基本科研业务费(DUT19GJ205)。

摘　　要：采用溶剂热法合成了铝基金属有机骨架材料MOF-253,通过将半导体光催化剂Ag I固载到MOF-253上合成不同摩尔比的Ag I/MOF-253复合材料,利用XRD、SEM、FT-IR、UV-Vis DRS和氮气物理吸附等对其进行表征。选取光催化降解有机染料罗丹明B(Rh B)作为模型反应,研究了Ag I/MOF-253作催化剂时,Ag I的负载量、双氧水浓度对可见光催化降解Rh B反应性能的影响。结果表明,Ag I和MOF-253摩尔比对催化剂性能有重要影响,优化后的反应体系60 min内对Rh B的降解率可达96%;催化剂循环使用4次,降解效率仍保持在95%以上。通过活性物种捕获实验探讨了影响该复合材料降解Rh B的光催化活性关键因素。MOF-253,an aluminium based metal-organic framework,is synthesized through solvothermal method.AgI/MOF-253 composites with different molar ratios are obtained through immobilizing Ag I on MOF-253 via in-situ formation.Ag I/MOF-253 samples are characterized by XRD,SEM,FTIR,UV-Vis DRS and N2 adsorption-desorption analysis.Degradation performance of Ag I/MOF-253 with different Ag I loading amounts are evaluated by degrading organic dye rhodamine B(Rh B)under visible light irradiation,different Ag I loading amounts and different concentrations of hydrogen peroxide are also explored.Results show that the molar ratio of Ag I to MOF-253 has an important effect on the photocatalytic activity of Ag I/MOF-253.Under optimal conditions,the degradation rate of Rh B over Ag I/MOF-253 can reach 96%within 60 minutes.AgI/MOF-253 catalyst can be recycled 4 times with degradation efficiency remaining above95%.Key factors affecting the photocatalytic activity of RHB are explored through active species trapping experiments.

关 键 词：金属有机框架 AGI 可见光催化降解 罗丹明B 

分 类 号：O614[理学—无机化学]