▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene catalyst involves (a) ultrasonically stripping graphene oxide aqueous solution for 8 hours to obtain graphene oxide working solution, (b) adding graphite phase carbon nitride into the working solution to obtain a mixed solution, (c) hydrothermally-treating the solution, filtering and drying to obtain a mixed powder, and (d) placing the powder in an inert atmosphere, heating at 600-1200℃, and naturally cooling. USE - Preparation of nitrogen-doped graphene catalyst used in liquid-phase hydrogenation of nitroaromatic hydrocarbon compound (all claimed). ADVANTAGE - The nitrogen-doped graphene catalyst has large specific surface area and excellent liquid-phase catalytic hydrogenation activity. It can solve the problems of metal active component poisoning, catalyst deactivation caused by dissolution and environmental pollution in the liquid phase hydrogenation reaction of the metal hydrogenation catalyst. The preparation method is simple, low raw material cost, low production cost and excellent cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for usage of the nitrogen-doped graphene catalyst in liquid-phase hydrogenation of nitroaromatic hydrocarbon compound, which involves adding the catalyst and nitroaromatic hydrocarbon into reaction solvent, and carrying out catalytic reaction in the presence of hydrogen.