▎ 摘　　要

NOVELTY - Preparing a metal nitrogen-doped graphene quantum dot composite material comprises (i) dissolving the organic acid and organic amine in the solvent to obtain a precursor solution A, and subjecting precursor solution A through hydrothermal reaction to obtain solution B, where the reaction temperature of hydrothermal reaction is 120-200℃, and the reaction time is 4-8 hours, and (ii) adding soluble metal salt into solution B to obtain mixed solution C, subjecting the mixed solution C to photocatalytic reaction under ultraviolet light irradiation, dialyzing, and freeze-drying to obtain metal nitrogen-doped graphene quantum dot composite material, where the wavelength of the ultraviolet light is 200-365 nm, and the reaction time is 1-4 hours under light irradiation. USE - The metal nitrogen-doped graphene quantum dot composite material is useful for catalyzing the thermal decomposition of ammonium perchlorate or preparing an ammonium perchlorate catalyst (claimed). ADVANTAGE - The method has simple synthesis steps, easy control condition, short synthesis time, high yield and convenient use. The composite material catalyzes thermal decomposition reaction of ammonium perchlorate (AP), has good catalytic effect on the energetic substance AP, and is good combustion speed catalyst for composite solid propellants. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a metal nitrogen-doped graphene quantum dot composite material.