▎ 摘　　要

NOVELTY - Preparation of graphene/titanium dioxide (TiO2) composite material involves oxidizing placing graphite powder with potassium permanganate to graphene oxide, dissolving butyl titanate in anhydrous ethanol, hydrochloric acid and deionized water, drying solution, calcining, and grinding with anhydrous ethanol to obtain nano-TiO2; and dispersing graphene oxide in anhydrous ethanol, adding nano-TiO2, reacting in PTFE reactor, cooling to remove solvent, freeze-drying residue, and grinding into powder. USE - Method for preparing graphene/TiO2 composite material (claimed). ADVANTAGE - The composite material has excellent antibacterial property. DETAILED DESCRIPTION - Preparation of graphene/titanium dioxide (TiO2) composite material comprises placing graphite powder in container, placing container in ice bath, adding concentrated sulfuric acid, stirring for 5-10 minutes, adding potassium permanganate slowly, stirring further for 15-20 minutes, standing at room temperature for 21-26 hours, placing container in ice bath, adding deionized water, standing in ice bath further for 4-7 minutes, adding hydrogen peroxide dropwise until bubble generation, filtering reaction mixture, washing residue with hydrochloric acid, washing further with deionized to neutral, and stripping ultrasonically to obtain graphene oxide; adding anhydrous ethanol slowly to butyl titanate, adding hydrochloric acid and deionized water sequentially dropwise, stirring, drying obtained solution, calcining at high temperature to obtain pale yellow crystal, and grinding obtained crystals with anhydrous ethanol to obtain nano-TiO2; and dispersing graphene oxide in anhydrous ethanol, adding nano-TiO2, reacting in PTFE reactor, cooling to remove solvent, freeze-drying residue, and grinding into powder.