▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene/nickel/graphite phase carbon nitride composite photocatalytic material comprises (1) preparing Ni-loaded 3D graphene using catalyst, carbon source, alkali metal salt, carbon source and alkali metal salt with ratio of 1: (10-20): (100-200), dissolving in water, stirring for 1-2 hours, placing in the refrigerator and freezing into pieces, (2) freeze-drying to obtain lyophilized powder, (3) adding lyophilized powder into an ark or a crucible, heating to 600-750 degrees C at 5-15 degrees C/minutes under hydrogen, keeping for 1-2 hours, washing with deionized water many times and drying to obtain Ni-loaded 3D graphene particles, (4) preparing of 3D graphene/Ni/gC3N4 by using Ni particles-loaded 3D graphene and precursor of gC3N4, mixing in molten manner and placing mixed solid in an ark under an argon atmosphere, heating at 500-600 degrees C at 5-15 degrees C/minutes and incubating for 2-4 hours to obtain a 3D graphene/Ni/gC3N4 composite material. USE - The method is useful for preparing three-dimensional graphene/nickel/graphite phase carbon nitride composite photocatalytic material.