▎ 摘　　要

NOVELTY - An environmentally-friendly composite oxide graphene nanofiltration membrane comprises a base film and a graphene oxide film as a separation layer. The graphene film covers the base film. The graphene oxide film is coated with a crosslinked film for protecting graphene film. The crosslinked film is formed by crosslinking polyvinyl alcohol and a crosslinking agent. The crosslinking agent is a dihydric aldehyde or maleic anhydride. The crosslinked film has a porous structure. USE - Environmentally-friendly composite oxide graphene nanofiltration membrane (claimed). ADVANTAGE - The environmentally-friendly composite oxide graphene nanofiltration membrane is prepared and operated easily. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of environmentally-friendly composite oxide graphene nanofiltration membrane.