Preparation of MIL-53(Fe)Photocatalytic Material and Degradation of Tetracycline Hydrochloride in Water
Objective:To prepare a new photocatalytic material for the efficient degradation of tetracycline hydrochloride in water.Methods:MIL-53(Fe)was prepared by solvothermal method and characterized by XRD,FT-IR,XPS,SEM,UV-Vis DRS,BET,etc.The photocatalytic activity,influencing factors and mechanism of degradation of tetracycline hydrochloride were investigated.Results:Under visible light,the degradation rate of tetracycline hydrochloride was 99%when the degradation time was 180 min,the mass concentration of tetracycline hydrochloride was 20 mg/L and the amount of material was 0.2 g/L.Conclusion:The addition of catalysts in the process of degradation showed that both the dosage and the initial pH value of the solution had great influence on the degradation effect.Superoxide free radical(·O2-)plays a major role in the catalytic mechanism,hole(h+)plays a secondary role,and hydroxyl free radical(·OH)has no role.The stability of the material was evaluated.The material stability was good after 5 cycle degradation.
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