▎ 摘　　要

NOVELTY - The method involves uniformly dispersing oxidized graphene obtained by chemical oxidation in the ionic liquid to obtain an oxidized graphene/ionic liquid solution. The oxidized graphene/ionic liquid solution is pumped onto substrate by vacuum filtration to prepare ionic liquid/graphene gas separation membrane. USE - Method for preparing ionic liquid/graphene gas separation membrane. ADVANTAGE - The ionic liquid different from solubility and diffusion coefficient of different gas can be used while realizing efficient and stable gas separation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application device.