▎ 摘　　要

NOVELTY - Preparing graphene quantum point-graphene-titanium dioxide composite material involves dissolving graphene oxide in 10 moles per liter sodium hydroxide solution and then sonicating the dissolved material for 30 minutes to disperse the graphene oxide. The sonicated material is stirred with titanium dioxide for 12 hours and then the stirred material is mixed. The mixed material is heated at 130-150 degrees C for 12 hours and then the heated material is cooled to room temperature. The cooled material is subjected to perform centrifugal separation. USE - Method for preparing graphene quantum point-graphene-titanium dioxide composite material (claimed). ADVANTAGE - The method enables to prepare graphene quantum point-graphene-titanium dioxide composite material in environment-friendly manner, with excellent catalytic performance, without secondary pollution, and has improved light catalyze efficiency for degradation of dye. DETAILED DESCRIPTION - Preparing graphene quantum point-graphene-titanium dioxide composite material involves dissolving graphene oxide in 10 moles per liter sodium hydroxide solution and then sonicating the dissolved material for 30 minutes to disperse the graphene oxide. The sonicated material is stirred with titanium dioxide for 12 hours and then the stirred material is mixed. The mixed material is heated at 130-150 degrees C for 12 hours and then the heated material is cooled to room temperature. The cooled material is subjected to perform centrifugal separation and then the separated material is washed with pure water and then with 0.1 mole per liter. The washed material is dried to obtain graphene-titanium dioxide nanotube composite material. Citric acid and thiourea are stirred with dimethylformamide in mass ratio of 21:23 and then reacting the stirred material with ethyl alcohol at 160-180 degrees C for 4-6 hours. The reacted material is subjected to perform centrifugal separation to obtain graphene quantum dots supernatant solution. The obtained supernatant solution is stirred with graphene-titanium dioxide nanotube composite material for 24 hours and then the stirred material is subjected to perform centrifugal separation. The separated material is dried to obtain the desired product.