▎ 摘　　要

NOVELTY - Method for preparing graphene porous membrane, involves (a) thermally reducing graphene oxide slurry to obtain HT-graphene oxide, and thermally-reducing at 450-480 degrees C for 12 seconds to 20 minutes, (b) dispersing the HT-graphene oxide in a solvent, adding a catalyst, uniformly stirring, adding an excessive amount of hydrogen peroxide, fully reacting, purifying the product, and washing to obtain FL-graphene oxide powder, and (c) dispersing the FL-graphene oxide powder in a solvent, and stacking on the base membrane by vacuum filtration to obtain the desired graphene porous membrane. USE - The method is useful for preparing graphene porous membrane used as ultrafiltration membrane for treating cationic dyes or flexible device (all claimed). ADVANTAGE - The method is simple in operation, economical, environmentally-friendly, and has low system viscosity, and provides fast, efficient, and recyclable graphene porous membrane through simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the graphene porous membrane as an ultrafiltration membrane or a flexible device, and is obtained by the above-mentioned preparation method.