▎ 摘　　要

NOVELTY - The application method of manganese oxide composite nitrogen-doped graphene material in photocatalytic degradation of ammoniacal nitrogen under near infrared light. USE - Application of manganese oxide composite nitrogen-doped graphene material in photocatalytic degradation of ammoniacal nitrogen into nitrogen and water (claimed). ADVANTAGE - The method enables the application of manganese oxide composite nitrogen-doped graphene material in photocatalytic degradation of ammoniacal nitrogen under near infrared light for 5-10 times, and ensures that the ammoniacal nitrogen degradation rate is greater than 92%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for purification of ammoniacal nitrogen, which involves adding manganese oxide composite nitrogen-doped graphene material to ammoniacal nitrogen-containing liquid phase system, irradiating the liquid phase system with near-infrared light, and photocatalytically degrading ammoniacal nitrogen into nitrogen and water.