▎ 摘　　要

NOVELTY - Preparation of magnetic graphite-graphene composite film involves mixing carbon nanotubes and surfactant in water, ultrasonic dispersing, adding metal foil, ultrasonic treating at 30-100 W for 0.1-1 hour, chemical vapor depositing, growing carbon nanotubes in toughened graphene, feeding hydrogen gas, heating at 850-1100 degrees C, thermally reducing metal foil for 10-30 minutes, feeding methane, heating at 850-110 degrees C for 0.1-1 hour, cooling, feeding inert gas, dispersing metal oxide nanoparticles in dispersant, applying to metal foil, and chemical vapor depositing at 800-850 degrees C under carbon source. USE - Method for preparing magnetic graphite-graphene composite film. ADVANTAGE - The method is simple, inexpensive, convenient, and suitable for industrial production. DETAILED DESCRIPTION - Preparation of magnetic graphite-graphene composite film comprises mixing carbon nanotubes and surfactant in water, ultrasonic dispersing, adding metal foil, ultrasonic treating at 30-100 W for 0.1-1 hour, chemical vapor depositing, growing carbon nanotubes in toughened graphene, feeding hydrogen gas, heating at 850-1100 degrees C, thermally reducing metal foil for 10-30 minutes, feeding methane, heating at 850-110 degrees C for 0.1-1 hour, cooling, feeding inert gas, dispersing metal oxide nanoparticles in dispersant, applying to metal foil, chemical vapor depositing at 800-850 degrees C under gaseous carbon source, hydrogen and water vapor mixed atmosphere, growing, mixing ammonium thiosulfate and n-butanol in water at ratio of 1 g:1-10 mL:100-1000 mL, soaking metal foil, etching for 4-24 hours, dissolving, soaking in n-butanol, and cleaning.