A stabilized Z-type NH2-MIL101(Fe, Cu)/WO3 composite enhancing photo-Fenton like degradation of levofloxacin

As a potential Fenton catalyst, Fe-based organic frameworks (Fe-MOFs) severely limit their application in practical heavy pollution due to their slow cycling rate. In this work, a novel photocatalyst (NH 2 -MIL101(Fe, Cu)/WO 3 ) was synthesized using a two-step hydrothermal method. Research on photocatalytic activity revealed that NH 2 -MIL101(Fe, Cu)/WO 3 , when combined with H 2 O 2 , exhibits higher degradation efficiency compared than pure NH 2 -MIL101(Fe, Cu) or WO 3 alone, achieving up to 90 % degradation of levofloxacin (LEV) under visible light irradiation. In addition, the effects of hydrogen peroxide dosage, pH and other factors on degradation performance were studied, and the results demonstrated good stability even after multiple cycles. This excellent photocatalytic performance is attributed to the formation of heterogeneous structures as well as the doping of copper ions. This not only inhibits the electron-hole recombination, but also improves the redox capacity of the catalyst accelerating the regeneration of Fe 3+ . This work offers a way to enhance the photo-Fenton activity of Fe-MOF-based catalysts.