▎ 摘　　要

NOVELTY - A graphene/carbon nitride composite material comprises carbon nitride compounded on graphene sheet. The carbon nitride has non-layered structure. USE - The graphene/carbon nitride composite material is used for simultaneously photocatalytically degrading organic matter and hydrogen production (claimed). ADVANTAGE - The material has specific shape, layered structure and excellent photocatalytic activity. The method is suitable for large-scale preparation and has simple technique, easy operation and low cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing graphene/carbon nitride composite material comprising dispersing expanded graphite, surfactant and water to obtain dispersion, centrifuging and grinding to obtain graphene micro-nano sheet, mixing graphene micro-nano sheet with nitrogen source and water, continuously grinding to obtain powder, calcining under semi-closed condition and calcining under open condition.