▎ 摘　　要

NOVELTY - Preparing graphene/carbon nanotube composite material, comprises cleaning and drying a substrate, coating catalyst on a surface of the dried substrate, adding catalyst coated substrate into a reaction chamber and then sealing, vacuumizing the chamber and then heating, introducing reducing gas and then heating to reduce catalyst, passing gaseous carbon source compound and reducing gas into the chamber and then reacting at 200-300 degrees C for 1-120 degrees C to obtain graphene, and passing gaseous carbon source compound and reducing gas into the chamber and then reacting. USE - The method is useful for preparing graphene/carbon nanotube composite material (claimed). ADVANTAGE - The method provides graphene/carbon nanotube composite material in a simple manner. DETAILED DESCRIPTION - Preparing graphene/carbon nanotube composite material, comprises: (a) cleaning and drying a substrate, and coating catalyst on a surface of the dried substrate; (b) adding the catalyst coated substrate into a reaction chamber and then sealing, vacuumizing the chamber under a vacuum degree of 10-3 Pa for 1-30 minutes and then heating the substrate at 400-700 degrees C; (c) introducing reducing gas with a flow rate 10-1000 standard cubic centimeter (sccm) per minute and then heating for 1-60 minutes to reduce catalyst; (d) passing gaseous carbon source compound and reducing gas into the chamber and then reacting at 200-300 degrees C for 1-120 degrees C to obtain graphene; and (e) passing gaseous carbon source compound and reducing gas into the chamber and then reacting at 700-1300 degrees C for 5-120 minutes.