▎ 摘　　要

NOVELTY - Preparing graphene-polyacrylonitrile-based nanocomposite material, comprises adding graphene and acrylonitrile monomer under the action of an initiator, performing the coupling method, loading graphene-polyacrylonitrile nanocomposite material with photocatalytic nanoparticles by using a crosslinking agent, and spinning by using electrostatic spinning method to obtain a graphene-polyacrylonitrile-based nanocomposite material with photocatalytic properties. USE - The nanocomposite material is useful for purifying and treating sewage (claimed). ADVANTAGE - The method: prepares product with photocatalytic performance; decomposes toxic organic matter in water through the synergistic effect of graphene and photocatalyst; increases the dissolved oxygen content of water; and realizes the purification and treatment of sewage.