▎ 摘　　要

NOVELTY - Graphite phase carbon nitride-graphene composite film photo-anode is claimed. The graphite phase carbon nitride is nanotube, and graphene is graphene roll. USE - The graphite phase carbon nitride-graphene composite film photo-anode is useful for photo-generated cathodic protection filed (claimed). ADVANTAGE - The photo-electrode: has excellent photoelectron transmission capacity and photo-generated cathodic protection performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphite phase carbon nitride-graphene composite film photo-anode. The method uses melamine powder and corundum ark to produce carbon nitride nanotubes; and uses graphene oxide powder, and fluorine-doped tin oxide (FTO) conductive glass as cathode and platinum sheet as anode.