▎ 摘　　要

NOVELTY - Catalyst for growing a three-dimensional carbon nano tube and a graphene composite material is claimed. The catalyst is prepared by adopting urea as a precipitator, and nitrate as an active component, which is uniformly deposited on a graphene oxide carrier with a surface absorbed with a surfactant. USE - The catalyst is useful for growing and preparing three-dimensional carbon nano tube and graphene composite material (claimed). ADVANTAGE - The catalyst has high activity. The preparation method is simple and controllable. The prepared three-dimensional carbon nanotube/graphene composite material has regular shape. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the catalyst, comprising (a) adding water into graphene oxide, ultrasonically dispersing into a suspension, then adding surfactant aqueous solution, and ultrasonically dispersing, (b) dripping nickel nitrate solution into the material obtained in the step (a), uniformly dispersing, adding urea, heating to 85-95 degrees C, reacting for 3- 5 hours, and controlling the concentration of nickel nitrate solution to 9-11 mg/ml, and (c) filtrating, washing, drying and reducing the material obtained in the step (b) to obtain the product; and (2) use method of the catalyst for preparing three-dimensional carbon nano tube and graphene composite material, comprising placing the catalyst into a heating area of a horizontal reaction furnace, heating to 700-800 degrees C under argon atmosphere, and switching to a hydrogen reducing catalyst, switching the reduced catalyst to carbon dioxide for growing carbon nano tube, finally cooling the catalyst in the argon atmosphere to room temperature, and obtaining the three-dimensional carbon nano tube and the graphene composite material, or placing the catalyst into the heating area of the horizontal reaction furnace, heating to 810-900 degrees C, reducing the catalyst in the process by graphene oxide carrier, switching the reduced catalyst to methane for growing carbon nano tube, finally cooling the catalyst in the nitrogen atmosphere to room temperature, and obtaining the three-dimensional carbon nano tube and the graphene composite material.