▎ 摘　　要

NOVELTY - Few-layer graphene film is prepared by cleaning copper foil substrate by dipping the copper foil into acetone, isopropanol or ethanol, de-ionized water; annealing copper foil for first time in a mixture of argon and hydrogen; carrying out nitric acid solution treatment to copper foil annealed for first time; stacking upper and lower two layers of copper foil gap on quartz sheet; performing second annealing treatment; growing graphene on annealed copper foil by introducing methane and argon, hydrogen, growing graphene; and cooling graphene film, and finishing preparation of graphene film. USE - The method is useful for preparing few-layer graphene film by normal pressure chemical vapor deposition. ADVANTAGE - The method is simple and economical. The graphene film has uniform and controllable layer number, large area, high purity, high light transmittance. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating the method for preparing few-layer graphene film by normal pressure chemical vapor deposition (Drawing includes non-English language text).