▎ 摘　　要

NOVELTY - Preparation of graphene-like carbon nitride material comprises placing graphitic carbon nitride material in muffle furnace, and calcining at 500-600 degrees C for 3-10 minutes; immediately placing product in liquid nitrogen; and volatilizing liquid nitrogen, placing in muffle furnace, calcining at 500-600 degrees C for 3-10 minutes, removing from furnace, placing in liquid nitrogen, and repeating for 3-10 times to obtain final product. USE - Method for preparing graphene-like carbon nitride material used for degrading organic dyes under visible light or photocatalytically producing hydrogen (claimed). ADVANTAGE - The product has short preparation, and high photocatalytic reaction efficiency.