▎ 摘　　要

NOVELTY - Preparation method of graphene -based negative electrode reducing film, involves (1) mixing ferric graphene and iron group element metal precursor in water, fully stirring, then heating and stirring for 1-3 hours in water bath at 70-90 ℃, then freezing and drying, (2) grinding solid, dried into powder, fully mixing with melamine, mass of the melamine is 4-7 times of the mass of the oxidation graphene, then calcining under the argon gas atmosphere of the tubular furnace; cooling to room temperature, pickling, ultrapure water washing and filtering and drying to obtain nitrogen-doped metal graphene powder, and (3) diluting the catalyst powder prepared with ultrapure water and forming the catalyst dispersion liquid of 0.0005-0.002 mg/mL, and preparing the reducing and graphene dispersion liquid with the concentration of 0.0005-0.002 mg/mL. USE - Preparation of graphene -based negative electrode reducing film for removing the antibiotic in the waste water. ADVANTAGE - The method is simple, easy to operate, and has the ability of intercepting pollutant, realizing separation and synergistic conversion, greatly improving the catalytic performance, and long service life, which can be applied to water treatment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene negative electrode reducing film.