▎ 摘　　要

NOVELTY - Degrading organic pollutants in water comprises using peroxodisulfate to degrade organic pollutants in water in the presence of a catalyst of single-atom copper/nitrogen-doped graphene, where copper is supported on azagraphene in a single-atom site state, the loading amount of copper is 0.2-6 wt.% based on the total weight of the catalyst, and the carrier nitrogen-doped grapheme (remaining amount), and peroxodisulfate is potassium peroxodisulfate and/or sodium peroxodisulfate. USE - The method is useful for degrading organic pollutants in water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the catalyst of single-atom copper/nitrogen doped graphene, comprising (i) mixing and stirring the graphene-containing salt solution, removing the solvent to obtain the mixture, (ii) placing the obtained mixture and nitrogen-releasing small molecule compound respectively in the device of the same reaction space, and calcining to obtain the catalyst, where the copper salt in the copper salt solution is soluble copper salt, the solvent is water and/or alcohol solvent 1-4C, the nitrogen-releasing small molecule compound is dicyandiamide, urea and/or melamine. The device with the same reaction space comprises a tubular furnace, a muffle furnace and/or a high-temperature kiln; and (2) use method of the catalyst comprising using the single-atom copper/nitrogen doped graphene catalyst to activate the peroxide disulfate to degrade the organic pollutant in the water, the peroxydisulfate is potassium peroxydisulfate and/or sodium peroxydisulfate.