▎ 摘　　要

NOVELTY - Preparing composite material comprises mixing graphene oxide as solute and multi walled carbon nanotube using 100 ml of deionized water as solvent to obtain mixed solution and then adding obtained mixed solution, stirring the mixture, carrying out ultrasonic reaction and then transferring into a hydrothermal kettle, performing hydrothermal treatment, cooling the mixture to room temperature, adding obtained composite solid product into the deionized water to obtain solution and then dropping the noble metal chlorate solution, and stirring and centrifuging the solution. USE - The method is useful for preparing composite material, which is useful for making catalytic agent, super capacitor, FET, lithium ion battery or fuel cell (claimed). ADVANTAGE - The method conveniently prepares the composite material in an eco-friendly manner with high working efficiency and quality and excellent catalytic performance. DETAILED DESCRIPTION - Preparing composite material comprises mixing graphene oxide as solute and multi walled carbon nanotube using 100 ml of deionized water as solvent to obtain mixed solution and then adding obtained mixed solution at temperature of 25-40 degrees C, stirring the mixture, where the mass ratio of the graphene oxide multi-walled carbon nanotube is 120-160 mg:60-100 mg, carrying out ultrasonic reaction at power of 100-300 W for 2 hours and then transferring into a hydrothermal kettle, performing hydrothermal treatment, cooling the mixture to room temperature to obtain graphene-carbon nanotube composite solid product, adding obtained composite solid product into the deionized water to obtain solution with concentration of 0.4-1.2 mg/ml and then dropping the noble metal chlorate solution at 0-20 degrees C, and fully stirring and centrifuging the solution.