▎ 摘　　要

NOVELTY - Preparation of graphene oxide film involves preparing aqueous solution or organic solvent solution of graphite oxide from graphite, adding organic solvent or water into the aqueous solution or organic solvent solution of graphite oxide, performing ultrasonic treatment, centrifuging, removing solid, adding mixed solvent of water and organic solvent into solid, performing ultrasonic treatment, centrifuging, removing graphene oxide solution, performing Langmuir-Blodgett method by dripping graphene oxide solution in water to form film, and transferring film to substrate. USE - Manufacture of graphene oxide film used for forming graphene film for use in sensor and electrode material (all claimed). ADVANTAGE - The graphene oxide film is manufactured efficiently with productivity. DETAILED DESCRIPTION - Preparation of graphene oxide film involves preparing aqueous solution or organic solvent solution of graphite oxide from graphite, adding organic solvent or water into the aqueous solution or organic solvent solution of graphite oxide, performing ultrasonic treatment, centrifuging, removing solid, adding a mixed solvent of water and organic solvent into the solid, performing ultrasonic treatment, centrifuging, removing graphene oxide solution (supernatant), performing Langmuir-Blodgett method by dripping graphene oxide solution in water to form film on water-air interface, and transferring the oxidized graphene film to substrate. INDEPENDENT CLAIMS are included for the following: (1) manufacture of graphene film, which involves reducing graphene oxide film in a reducing atmosphere, and heating at 800-1000 degrees C for 15-60 minutes; and (2) graphene film.