▎ 摘　　要

NOVELTY - Composite material comprises molybdenum sulfide and graphene. The molybdenum sulfide is distributed in the layered structure of the surface of graphene. The molybdenum sulfide has a P36/mmc space group structure. USE - Composite material used for photocatalytic degradation of ammonia nitrogen (claimed). ADVANTAGE - The composite material greatly improves the utilization of solar energy, and the photocatalyst is repeatedly used for 5 times, where degradation rate is more than 87%. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for producing composite material, which involves providing a molybdenum sulfide solid; (2) mixing the graphene and molybdenum sulfide solids in a solvent to obtain a mixed solution; (3) reacting the mixture at a temperature of 100 to 150 degrees C for 6 to 10 hours to obtain the composite material; and (4) a method for degrading ammonia nitrogen, which involves using composite material under the condition of near infrared light as photocatalyst to catalyze the oxidation of ammonia nitrogen in alkaline atmosphere for removing ammonia nitrogen in water.