▎ 摘　　要

NOVELTY - Method for preparing titanium oxide nanoparticle/multilayer graphene composite material, involves (i) taking dimethylformamide and deionized water and uniformly mixing to obtain a mixed solvent (A), (ii) weighing expanded graphite, adding to the solvent (A) and ultrasonically processing to obtain a multilayer graphene dispersion solution (C), where the concentration of expanded graphite relative to solvent (A) is 0.5-2 mg/ml, (iii) preparing dilute nitric acid solution as a solution (B), (iv) weighing nano titanium dioxide powder to the solution (C), ultrasonically processing for 4 hours, where the concentration of the titanium dioxide powder relative to the solvent (A) is 3-6 mg/ml and adding the solution (B) to the solution (C), where the volume ratio of the solution (B) to the solvent (A) is (0.5-1):1, (iv) placing the solution (C) in a water bath, magnetically stirring and reacting, and (v) cooling the solution (C), centrifugally washing, and after washing, drying in a oven. USE - The method is useful for preparing titanium oxide nanoparticle/multilayer graphene composite material. ADVANTAGE - The method adopts simple process and is suitable for industrial production. DETAILED DESCRIPTION - Method for preparing titanium oxide nanoparticle/multilayer graphene composite material, involves (i) taking dimethylformamide and deionized water in a volume ratio of 8:2 and uniformly mixing to obtain a mixed solvent (A), (ii) weighing expanded graphite, adding to the solvent (A) and ultrasonically processing for 3 hours to obtain a multilayer graphene dispersion solution (C), where the concentration of expanded graphite relative to solvent (A) is 0.5-2 mg/ml, (iii) preparing a 2 mol/l dilute nitric acid solution as a solution (B), (iv) weighing nano titanium dioxide powder to the solution (C), ultrasonically processing for 4 hours, where the concentration of the titanium dioxide powder relative to the solvent (A) is 3-6 mg/ml and adding the solution (B) to the solution (C), where the volume ratio of the solution (B) to the solvent (A) is (0.5-1):1, (iv) placing the solution (C) in a water bath at 80 degrees C, magnetically stirring and reacting at 300 rpm for 5-10 hours, and (v) cooling the solution (C), centrifugally washing 3 times using deionized water, centrifugally washing 3 times using alcohol, where the centrifugal speed is 6000 rpm, and after washing, drying in a oven at 70 degrees C for 24 hours to obtain the product.