Fabrication of magnetic BaFe12O19/Ag3PO4 composites with an in situ photo-Fenton-like reaction for enhancing reactive oxygen species under visible light irradiation

Abstract

This research was designed to synthesize a magnetic in situ Fenton-like photocatalyst using simple methods. The sheet materials of BaFe₁₂O₁₉, with inherent magnetic properties, decorated with Ag₃PO₄ and in situ catalytic conversion of H₂O₂ generated on the surface of Ag₃PO₄ could produce more reactive oxygen species (ROS) for degradation of organic pollutants via a photo-Fenton process. ESR, trapping experiments of different scavengers and H₂O₂ detection proved that the ROS of oxidation of bisphenol A is mainly produced by the Fenton-like reaction. This work has effectively improved the degradation activity of Ag₃PO₄. Simultaneously, the BaFe₁₂O₁₉/Ag₃PO₄ composite can be easily separated from the reaction system via applying an external magnetic field, and shows promising applications for the photo-oxidative degradation of environmental contaminants.