▎ 摘　　要

NOVELTY - Synthesis of graphite-based nitrogen-chelated iron(III) ion-iron oxide catalyst comprises adding nano-ferrous ferric oxide into methanol to form dispersion; adding 2-methyl imidazole and dispersion into methanol to form first solution; dissolving zinc salt and polyvinylpyrrolidone in methanol-graphene oxide solution to form second solution; mixing first and second solutions, stirring, and aging at room temperature; centrifuging, washing with ethanol, and drying; and putting into tubular furnace to roast under nitrogen atmosphere, and naturally cooling. USE - The method is used for synthesis of graphite-based nitrogen-chelated iron(III) ion-iron oxide catalyst for sewage treatment agent and processing sewage organic pollutant, particularly bisphenol A, 2-chloro-phenol,ciprofloxacin, phenhydramine, phenytoin, 2,4-dichlorphenoxyacetic acid, or ibuprofen (all claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for sewage treatment agent comprising graphite-based nitrogen-chelated iron(III) ion-iron oxide catalyst.