MOF-808/AgBr 的制备及光催化降解盐酸四环素性能研究.

MOF/AgBr composite materials were synthesized using hydrothermal and in-situ precipitation methods, and applied to simulate the photocatalytic degradation of tetracycline hydrochloride (TC-HCl) under solar irradiation. The results showed that when the AgBr doping amount was 30%, the composite material MOF/AgBr-3 exhibited high photocatalytic activity after 180 minutes of visible light irradiation, with a degradation rate of 84.50% for TC-HCl. The reaction rate constant of the composite material is approximately 0.0121/min, which is about 6.1 times that of the original AgBr, according to the fitting of first-order kinetics. The single photon excitation pathway constructed between MOF-808 and AgBr improves the efficiency of photo generated carrier transport and separation, expands the visible light response range, and achieves effective separation of holes (h+) and electrons (e-) in space. Superoxide radicals (·O-²) and hydroxyl radicals (·OH) are the main active species in photocatalytic reactions. This composite material has good stability, and after five cycles, its photodegradation ability retention rate is as high as 84.35%. The degradation pathways of TC-HCl include its own hydrolysis, deamination, demethylation, oxidation, and ring opening processes. [ABSTRACT FROM AUTHOR]