TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The preparation of titanium dioxide powder comprises either: adding the titanium source into water, alcohol water or alcohol system, and orderly adding acetic acid, mold softening agent and precipitating agent in stirring operation, loading the prepared reaction liquid into a reactor, and reacting at 60-300 degrees C for 4-48 hours, cooling, separating the precipitate from the product, and cleaning and drying the precipitate; or adding organic acid into a water system and adding titanium source in stirring operation, loading the prepared reaction liquid into the hydrothermal reactor and reacting at 20-300 degrees C for 1-96 hours, cooling and separating the precipitate from the product, and cleaning and drying the precipitate. The dispersing of titanium dioxide powder into the oxidized graphene dispersing agent and performing the hydrothermal reaction comprises dissolving the oxidized graphene into organic solvent and ultrasonically dispersing for 20-60 minutes to obtain the dispersing agent of the oxidized graphene; adding the titanium dioxide powder into the dispersing agent of the oxidized graphene, stirring the powder and transferring the prepared mixed dispersing agent into a hydrothermal reactor, and reacting at 20-300 degrees C for 1-96 hours; cooling and separating the precipitate from the product, and cleaning and drying the precipitate, where the mass ratio of the titanium dioxide powder to the oxidized graphene is 1:1-500:1, and the organic solvent is absolute ethanol, isopropyl alcohol and/or ethylene glycol, or the mixture of one of the alcohols and water. Preferred Components: The titanium source is titanium trichloride in hydrochloric acid solution, titanium tetrachloride, tetrabutyl titanate and/or titanium isopropoxide in the volume fraction of 15-20%. The mold softening agent is polyethylene glycol, sodium dodecyl benzene sulfonate, polyvinyl pyrrolidone, urotropine, glucose and/or glycerol. The precipitating agent is urea, aqueous ammonia, ammonium fluoride, ammonium chloride and/or thiourea. The volumetric ratio of ethanol to water in the alcohol water system is 1:10-10:1, the volumetric ratio of the alcohol water system to titanium source is 1:1-50:1, the volumetric ratio of the acetic acid to titanium source is 1:10-2:1, the molar ratio of the mold softening agent to the titanium source is 1:3-6:1 and the molar ratio of the precipitating agent to the titanium source is 1:4-4:1.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic acid is oxalic acid, citric acid, malic acid and/or tartaric acid, where after the organic acid is added into the water system, the molar concentration of the organic acid is 0.01-10 mol/l, and the volumetric ratio of water to titanium source is 5:1-70:1.