▎ 摘　　要

NOVELTY - The film disperses a graphene oxide in water to form a graphene oxide dispersion, and then using inorganic salt as a modifier to perform cationic modification. The cation-modified suspension is filtered under reduced pressure to obtain the macroscopic film. The concentration of graphene oxide in the graphene oxide dispersion is 0.05-5 mg/mL. The concentration of graphene oxide in the graphene oxide dispersion is 0.5 to 1.5 mg/mL. The thickness of the macroscopic film is 1 to 1000 mu m. USE - Macroscopic film with molecular separation performance. ADVANTAGE - The film is simple, and its thickness, size and shape can be adjusted by changing the amount of raw materials, and the adjustment method is simple, and has a good application prospects in separation engineering, sewage treatment and other related fields. DESCRIPTION OF DRAWING(S) - The drawing shows a pictorial view of the sodium modified graphene oxide macroscopic film and a scanning electron microscope.