▎ 摘　　要

NOVELTY - Preparing supramolecular self-assembled perylene imide (PDI) nanomaterial comprises (1) adding graphene oxide to deionized water, ultrasonically mixing to obtain mixed solution 1, adding the transition metal salt solution and ultrasonic until the transition metal salt is uniformly dispersed in mixed solution 1, quickly freezing the solution in liquid nitrogen, and then freeze drying in the freeze dryer, (2) adding the sample obtained from the freeze-drying into a tube furnace, and performing calcination in an argon and ammonia atmosphere to obtain a transition metal monoatom-anchored azagraphene, (3) dissolving perylene imide in anhydrous ethanol solution to obtain mixed solution 2, using a pipette to pipette triethanolamine and add it to mixed solution 2, ultrasonically dissolving perylene imide uniformly, and and adding the transition metal monoatom anchored azagraphene into the mixed solution under ultrasonic conditions. USE - The method is useful for preparing supramolecular self-assembled perylene imide nanomaterial, which is useful as a photocatalyst for photocatalytic degradation of phenolic pollutants (claimed), and energy and material preparation field. ADVANTAGE - The method accelerates the separation efficiency of photo-generated carriers of the PDI material using a transition metal single atom anchored on the azagraphene as a promoter, which improves its photocatalytic degradation performance of environmental water phenolic pollutants. DETAILED DESCRIPTION - Preparing supramolecular self-assembled perylene imide nanomaterial comprises (1) adding graphene oxide to deionized water, ultrasonically mixing to obtain mixed solution 1, adding the transition metal salt solution and ultrasonic until the transition metal salt is uniformly dispersed in mixed solution 1, quickly freezing the solution in liquid nitrogen, and then freeze drying in the freeze dryer, (2) adding the sample obtained from the freeze-drying into a tube furnace, and performing calcination in an argon and ammonia atmosphere to obtain a transition metal monoatom-anchored azagraphene, (3) dissolving perylene imide in anhydrous ethanol solution to obtain mixed solution 2, using a pipette to pipette triethanolamine and add it to mixed solution 2, ultrasonically dissolving perylene imide uniformly, and under ultrasonic conditions, adding the transition metal monoatom anchored azagraphene into the mixed solution, performing ultrasonic treatment to make the perylene imide and the transition metal monoatom-anchored azagraphene uniformly mixed, adding hydrochloric acid, and stirring the sample until the sample precipitates, and (4) centrifuging the mixed solution, washing the resulting sample with water to neutrality, quickly freezing with liquid nitrogen and freeze-drying to obtain a supermolecular self-assembled perylene imide nanomaterial modified by a transition metal single atom.