▎ 摘　　要

NOVELTY - Secondary growth of graphene coated titanium dioxide photo-catalysis composite material, comprises e.g. (i) mixing titanate isopropoxide, and ethylene glycol as structure guiding agent to obtain ethylene glycol coordinated product, then adding titanium-centered titanium oxide (TiO6) octahedron, slowly dripping the solution into the acidic solution, then adding ethanol for hydrothermal reaction to obtain titanium dioxide primary growth and drying to obtain single growth of titanium dioxide amorphous, (ii) preparing graphene oxide by improving Hummers method, and (iii) diluting the obtained graphene oxide in deionized water, sonicating, mixing with obtained titanium dioxide, carrying out hydrothermal reaction, bonding hydrogen bonds between the surfaces of the amorphous titanium dioxide by different functional groups of the graphene oxide surface, removing functional groups of graphene oxide, reducing, binding unpaired p electrons on a carbon atom, secondarily growing and drying. USE - The method is useful for secondary growth of graphene coated titanium dioxide photo-catalysis composite material. ADVANTAGE - The composite material has increased preferentially adsorbing aromatic compound. DETAILED DESCRIPTION - Secondary growth of graphene coated titanium dioxide photo-catalysis composite material, comprises (i) taking titanate isopropoxide as titanium source, and ethylene glycol as structure guiding agent, mixing by magnetic stirring at room temperature for 3 hours to obtain ethylene glycol coordinated product, then adding titanium-centered titanium oxide (TiO6) octahedron, slowly dripping the solution into the acidic solution, then adding ethanol for hydrothermal reaction to obtain titanium dioxide primary growth, cooling to room temperature, taking ethanol, centrifugal washing with deionized water to neutralize and drying at 60 degrees C to obtain single growth of titanium dioxide amorphous, (ii) preparing graphene oxide by improving Hummers method, and (iii) diluting the obtained graphene oxide in deionized water and sonicating for 1 hour to completely peel off, then centrifuging the solution to disperse at a speed of 6000 revolutions/minute for 5 minutes to remove large pieces of graphene oxide which were difficult to disperse in the solution, adding obtained titanium dioxide and solution, mixing uniformly, adding the mixed solution into a hydro-thermal reaction kettle and carrying out hydro-thermal reaction at 180 degrees C for a certain time, bonding hydrogen bonds between the surfaces of the amorphous titanium dioxide by different functional groups of the graphene oxide surface, removing functional groups of graphene oxide and reducing, binding unpaired p electrons on a carbon atom to more titanium dioxide free titanium atoms, secondarily growing the amorphous titanium dioxide into a grain-formed shaped titanium dioxide under graphene encapsulation, cooling to room temperature, separately washing the product with ethanol and deionized water to remove impurities, and then drying at 60 degrees C to obtain final product.