Preparation method and application of pomegranate-shaped magnetic visible light heterogeneous Fenton catalyst material

The invention relates to a preparation method and application of a magnetic visible light heterogeneous Fenton catalyst ZnFe2O4 material. The obtained ZnFe2O4 photocatalyst material has a pomegranate-shaped structure, the nanosphere is formed by assembling a plurality of ultra-small ZnFe2O4 units, the particle size of a secondary unit is less than 5nm, and the ZnFe2O4 photocatalyst material has the characteristics of large specific surface area, adsorption capacity and the like, and is beneficial to smooth transmission of electrons. The preparation method disclosed by the invention is simple and low in cost, and the prepared ZnFe2O4 photocatalyst material has the characteristics of magnetic separation, repeated recovery and repeated use on the premise of having excellent Fenton photocatalytic capability. Fenton photocatalysis test results show that the ZnFe2O4 photocatalyst has excellent degradation performance under the irradiation of visible light, and can be used for degrading oxytetracycline (OTC), norflo