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,·O₂^-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 ·O₂^- is the main active substance to degrade MO.

李杨松(1997-),男,硕士研究生,研究方向为光催化降解水中污染物,2095972844@qq.com。