▎ 摘　　要

NOVELTY - Preparing graphene-titanium dioxide composite photo-catalytic material comprises e.g. adding 10-30 ml tetrabutyl titanate and 20-40 ml anhydrous ethanol mixed solution under room temperature, magnetically stirring uniformly to obtain light yellow solution, taking 15-35 ml anhydrous ethanol, 5-15 ml distilled water to the beaker, adding oxidized graphene powder ultrasonic dispersion uniformly to form uniform solution, where the mass ratio of graphene oxide and titanium dioxide is 1:20-1:20, adding 15-30 ml glacial acetic acid into the uniform solution, fully mixing to obtain the solution B. USE - The method is useful for preparing graphene-titanium dioxide composite photo-catalytic material (claimed). ADVANTAGE - The method: is simple. The material: has more excellent photo-catalytic performance improved ion doped titanium dioxide. DETAILED DESCRIPTION - Preparing graphene-titanium dioxide composite photo-catalytic material comprises (A) adding 10-30 ml tetrabutyl titanate and 20-40 ml anhydrous ethanol mixed solution under the room temperature, magnetically stirring uniformly to obtain light yellow solution, (B) taking 15-35 ml anhydrous ethanol, 5-15 ml distilled water to the beaker, adding oxidized graphene powder ultrasonic dispersion uniformly to form uniform solution, where the mass ratio of graphene oxide and titanium dioxide is 1:20- 1:20, adding 15-30 ml glacial acetic acid into the uniform solution, fully mixing to obtain the solution B, (C) slowly adding the solution B into the solution A and continuously magnetic stirring to obtain uniform sol, (D) aging the sol for 10-40 hours to obtain colloidal gel, (E) colloiding the gel at 50-200 degrees C of electric heating air dry box to dry until the solvent is completely volatilized, (F) providing the fully grinding the dried gel into solid powder, (G) grinding the powder after in a tubular resistance furnace, respectively sintering for 1-4 hours, cooling to obtain the graphene under the 400-600 degrees C of nitrogen atmosphere, titanium dioxide composite photo- catalytic material.