▎ 摘　　要

NOVELTY - Preparation of titanium dioxide nanotube/graphene composite material involves oxidizing graphite interlayer compound to form hydrophilic graphite oxide; ultrasonically peeling; centrifuging; filtering; drying to obtain graphene oxide powder; mixing titanium dioxide (TiO2P25) nanoparticle, alkali liquor, and alcohol organic solvent; adding oxidized graphene oxide powder; stirring to obtain mixed solution system; reacting; cooling; separating to obtain white precipitate; washing; and calcining to obtain titanium dioxide nanotube/graphene composite. USE - Preparation of titanium dioxide nanotube/graphene composite material used as electrode material, photocatalyst, solar water splitting, solar cell, and environmental protection areas (claimed). ADVANTAGE - The method provides titanium dioxide nanotube/graphene composite material with particle size of less than 300 nm, has high utilization rate of solar energy, and does not form self particle agglomeration and graphene sheet stack. It has easy to obtain raw materials, low cost, and has simple and safe process. DETAILED DESCRIPTION - Preparation of titanium dioxide nanotube/graphene composite material comprises processing graphite with strong protonic acid to form graphite interlayer compound; adding strong oxidant to oxidize it to form hydrophilic graphite oxide; cooling; diluting; subjecting into ultrasonic peeling; centrifuging to obtain graphite oxide dispersion stabilizer solution; filtering; drying to obtain graphene oxide powder; mixing titanium dioxide (TiO2P25) nanoparticle, alkali liquor, and alcohol organic solvent; adding graphene oxide powder; stirring to obtain mixed solution system; transferring mixed solution system into reaction kettle; sealing kettle; cooling at room temperature; separating to obtain white precipitate; washing; and calcining to obtain titanium dioxide nanotube/graphene composite.