▎ 摘　　要

NOVELTY - Graphene oxide film comprises a graphene oxide film layers interspersed with nanoparticles to form distributed tent-like nanostructures, and graphene oxide sheets covers nanoparticles and form tent-like protrusions under the support of nanoparticles in the tent-like nanostructures. USE - Used as graphene oxide film. ADVANTAGE - The method: realizes the reliable preparation of ultra-thin graphene oxide film on a flexible substrate; can intercalates nanoparticles into the ultra-thin structure, which ensures the construction of tent-like nano-structures in the ultra-thin structure; adjusts the intercalation ratio of nanoparticles, and film sieving channels, which can achieve molecular-scale regulation and can selectively separate small molecules of similar size. The film: has nano-tent-like structure, which can maximize the water flux while retaining the retention performance, stable structure in different pH aqueous solutions, and adjustable surface roughness, wettability and surface electrical properties, has excellent separation performance, adjustable structure and properties; and is suitable in the field of environmental pollution treatment and film separation technology. DETAILED DESCRIPTION - INDEPENDENT CLAIMs are also included for: (1) preparing graphene oxide film comprising covering a filtering surface of a filtering device with a buffer layer with uniform porosity, placing a flexible support film on the buffer layer, placing the dispersion containing the nanoparticles and graphene oxide in a suction filtration device, and taking vacuum suction filtration to assembled on the flexible support film; (2) preparing graphene oxide film by above method; (3) adjusting screen channel of the graphene oxide film comprising adjusting screen channel on the molecular scale achieved by adjusting the intercalation ratio of the nanoparticles in the graphene oxide film during the process of preparing the graphene oxide film; (4) adjusting the hydrophilicity and hydrophobicity of a surface of a graphene oxide film comprising ensuring the hydrophilicity adjustment of the film surface by intercalation ratio in the olefin film; and (5) film separation device or water purification device.