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AgI固载到MOF-253上合成不同摩尔比的AgI/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（RhB）作为模型反应，研究了AgI/MOF-253作催化剂时，AgI的负载量、双氧水浓度对可见光催化降解RhB反应性能的影响。结果表明，AgI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RhB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RhB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 AgI on MOF-253 via in-situ formation.AgI/MOF-253 samples are characterized by XRD,SEM,FTIR,UV-Vis DRS and N₂ adsorption-desorption analysis.Degradation performance of AgI/MOF-253 with different AgI loading amounts are evaluated by degrading organic dye rhodamine B (RhB) under visible light irradiation,different AgI loading amounts and different concentrations of hydrogen peroxide are also explored.Results show that the molar ratio of AgI to MOF-253 has an important effect on the photocatalytic activity of AgI/MOF-253.Under optimal conditions,the degradation rate of RhB over AgI/MOF-253 can reach 96% within 60 minutes.AgI/MOF-253 catalyst can be recycled 4 times with degradation efficiency remaining above 95%.Key factors affecting the photocatalytic activity of RHB are explored through active species trapping experiments.

李从(1994-),女,硕士研究生,研究方向为MOF材料光催化,licongdlut@qq.com