▎ 摘　　要

NOVELTY - Preparing titanium dioxide-carbon nitride-graphene oxide composite catalyst comprises mixing the graphene oxide slurry, titanium dioxide and melamine for the first reaction, drying the obtained first solid precipitate after the first reaction, and obtaining the titanium dioxide-carbon nitride-graphite oxide through the first calcining under an inert atmosphere alkene composite catalyst. USE - The method is useful for preparing titanium dioxide-carbon nitride-graphene oxide composite catalyst, which is used in the field of photocatalyst. ADVANTAGE - The composite catalyst: has stable photo-catalytic structure, large surface area, strong adsorption capacity, strong light absorption ability, photo-generated electron-hole separation efficiency is high; and has good photo-catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a titanium dioxide-carbon nitride-graphene oxide composite catalyst.