▎ 摘　　要

NOVELTY - Method for preparing porous graphene oxide film, involves (a) preparing metal organic polyhedron containing amino, (b) adding metal-based secondary building unit and an organic ligand to a solvent, dissolving fully, heating and reacting to obtain metal-organic polyhedral crystal, (c) preparing a GO/metal organic polyhedral mixed solution and an assembling film to dissolve the metal-organic polyhedral crystals in solvent, and mixing with graphene dispersion liquid uniformly, and (d) assembling obtained GO/ metal-ion polyhedral mixture on the porous substrate, forming a film layer, and drying to obtain the porous graphene dioxide film. USE - Method for preparing porous graphene oxide, which is used in sewage treatment, wastewater restoration, and brackish water desalination. ADVANTAGE - The porous graphene oxide film has good stability and excellent separation performance, and can be prepared in high valent salt, antibiotic and application of dye nano-filtration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for porous graphene oxide membrane prepared by the method.