▎ 摘　　要

NOVELTY - Preparation of graphene/carbon nanotube composite porous film involves (1) dispersing crosslinked polystyrene microspheres, graphene oxide and carboxylated carbon nanotubes in solvent to obtain suspension, (2) suction filtering to obtain filter membrane, (3) drying to obtain graphene oxide/carbon nanotube/polystyrene microsphere composite film, and (4) pressing and sandwiching composite film between graphite plates and placing in atmosphere furnace and carbonizing. USE - Preparation of graphene/carbon nanotube composite porous film used as shield material for shielding electromagnetic waves in electronic device (all claimed). ADVANTAGE - The preparation method is simple and uses polystyrene microspheres as template for uniform dispersion composite film through suction filtration, and adopts low-temperature carbonization to remove the template to produce graphene/carbon nanotube composite porous film.