▎ 摘　　要

NOVELTY - Preparation of graphene oxide film comprises spraying and atomizing graphene oxide dispersion to obtain nano- or micro-aerogel, and stacking on surface of base film under high voltage electric field condition to form ordered layered structure. USE - Method for preparation of graphene oxide film used for sewage treatment or seawater desalination (all claimed). ADVANTAGE - The film is recyclable. The method is simple, can process large area of any size according to requirement, solves the problem that the graphene oxide film is difficult to produce, and has low energy consumption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene oxide film preparation device comprises atomization system, moving platform, high voltage power supply and control system. The atomizing system comprises syringe booster and syringe booster nozzle for depositing graphene oxide dispersion. The positive pole of high voltage power source is electrically connected to the nozzle. The ground wire of high voltage power source is connected to moving platform. The control system is electrically or signally connected to moving platform.