Visible light driven self-cleaning carbon nitride heterojunction oil-water separation membrane, preparation method and application

The invention relates to the technical field of oil-water separation membranes, and discloses a visible light driven self-cleaning carbon nitride heterojunction oil-water separation membrane, a preparation method and application, the oil-water separation membrane comprises a modification layer formed on the surface of a substrate membrane; the modification layer is obtained by self-assembly of a heterojunction nano material and graphene oxide, and the heterojunction nano material is a heterostructure obtained by in-situ growth of an iron-based MOFs material on the surface of carbon nitride. The visible light driven self-cleaning carbon nitride heterojunction oil-water separation membrane provided by the invention is a PDA/g-C3N4-coated NMB composite membrane which is formed by self-assembling a hydrophilic PDA/g-C3N4-coated NMB heterojunction nano material and a GO sheet layer and has good surface hydrophilicity and underwater superoleophobic wetting characteristics. The composite membrane has excellent oil-w