▎ 摘　　要

NOVELTY - Copper-supported carbon-based single-atom material comprises a carbon matrix and copper atoms supported on the carbon matrix, where the carbon matrix has the appearance of graphene and is obtained by polymerization of dicyandiamide monomers, and the copper atoms are supported on the carbon matrix in the form of single atoms. USE - The copper-loaded carbon-based nitrogen atom material is used for catalytically activating potassium peroxymonosulfonate to degrade organic pollutants comprising sulfamethoxazole (all claimed). ADVANTAGE - The copper-loaded carbon-based nitrogen atom material improves degradation efficiency of sulfamethoxazole. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method for preparing the copper-supported carbon-based single-atom material, which involves (i) dissolving copper acetylacetonate and dicyandiamide in a first solvent, and ultrasonically treating to obtain a first dispersion system, where the first solvent comprises ethanol, (ii) mixing the first dispersion system with F127 to obtain a second dispersion system, where the mass ratio of the copper acetylacetonate, the dicyandiamide and the F127 is (1-8):400:40, (iii) drying the second dispersion system to obtain a first solid, (iv) calcining the first solid object under a protective atmosphere to obtain a second solid object, and (v) acid washing the second solid to obtain the copper-supported carbon-based monatomic material; and the use of the copper-loaded carbon-based nitrogen atom material in catalytically activating potassium peroxymonosulfonate to degrade organic pollutants.