▎ 摘　　要

NOVELTY - The preparation of three-dimensional graphene-nano titanium dioxide composite photocatalyst involves (i) obtaining aqueous graphene oxide solution, (ii) immersing foamed nickel in aqueous graphene oxide solution, ultrasonically processing to obtain oxidized graphene-loaded foamed nickel material, drying to obtain three-dimensional oxidized graphene material, (iii) dissolving hydrohalic acid, and titanium tetrachloride in anhydrous ethanol, stirring, soaking three-dimensional oxidized graphene material in solution, reacting, heat preserving, cooling, separating, cleaning, and drying. USE - Preparation of three-dimensional graphene-nano titanium dioxide composite photocatalyst (claimed). ADVANTAGE - The method prevents the stacking of graphene, and irreversible agglomeration during the manufacturing process, and enables the preparation of three-dimensional graphene-nano titanium dioxide composite photocatalyst having high specific surface area and electron transfer rate, controlled size and morphology, and excellent photocatalytic effect. DETAILED DESCRIPTION - The preparation method of three-dimensional graphene-nano titanium dioxide composite photocatalyst involves (i) obtaining an 1.0-10.0 mg/ml aqueous graphene oxide solution, (ii) immersing foamed nickel in an aqueous graphene oxide solution, ultrasonically processing to obtain oxidized graphene-loaded foamed nickel material, drying to obtain three-dimensional oxidized graphene material, (iii) dissolving hydrohalic acid, and titanium tetrachloride in anhydrous ethanol in a ratio of 0.1-0.6:0.2-0.8:30, stirring, soaking the three-dimensional oxidized graphene material in solution, reacting at 100-200 degrees C, heat preserving for 1-6 hours, cooling, separating, cleaning, and drying. An INDEPENDENT CLAIM is included for three-dimensional graphene-nano titanium dioxide composite photocatalyst, which comprises to-be-loaded titanium dioxide particles in the form of flakes.