▎ 摘　　要

NOVELTY - The porous graphene separation membrane comprises the porous substrate (1) and the graphene film (2) attached to the porous substrate, the surface is charged, the graphene film is a porous structure, the pore diameter in the porous structure is less than 1 nm. The thickness of the graphene film does not exceed the thickness of ten atomic layers, and the porous substrate is an insulator. USE - Porous graphene separation membrane. ADVANTAGE - Improves the selectivity of the graphene film, and the charging of the surface of the graphene film is easy to realize and the operation method is simple. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the method for preparing a porous graphene separation membrane. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the device. Porous substrate (1) Graphene film (2) Polar molecule (3)