▎ 摘　　要

NOVELTY - Preparing iron phosphide/iron single-atom Fenton-like photocatalyst comprises adding aqueous solution of ferric nitrate nonahydrate in the aqueous solution of graphene oxide, carrying out stirring, washing and freeze-drying to obtain iron single atom, mixing iron phosphide and iron single atom and dissolving in water, stirring, washing and freeze-drying, and obtaining iron phosphide/iron single-atom Fenton-like photocatalyst. USE - The photocatalyst is useful for treating tetracycline antibiotic wastewater (claimed). ADVANTAGE - The photocatalyst: has variety of valence states; significantly improves the utilization rate of hydrogen peroxide; improves the distribution of active sites of heterogeneous catalysts; improves the activity efficiency of hydrogen peroxide; and significantly improves the degradation efficiency of the antibiotic tetracycline wastewater when the catalyst is used in the treatment of tetracycline antibiotic wastewater. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: iron phosphide/iron single-atom Fenton-like photocatalyst prepared by the above-mentioned preparation method; and use method of the photocatalyst, comprising adding iron phosphide/iron single-atom Fenton-like photocatalyst to the pollutant solution containing tetracycline, adding hydrogen peroxide after reaching the adsorption equilibrium, and carrying out the reaction under the irradiation of visible-near-infrared light.