▎ 摘　　要

NOVELTY - The large-scale preparation method of graphene oxide-tannic acid two-dimensional film, involves (S1) preparing graphene oxide-tannic acid mixed solution, (S2) evenly scraping the graphene oxide-tannic acid mixed solution on the surface of base film through wire rod coater to achieve large-scale scraping, and (S3) immersing scraped film in metal ion solution for cross-linking and coordination. USE - Large-scale preparation method of graphene oxide-tannic acid two-dimensional film used for nanofiltration of pollutants in water (claimed), and used for recycling waste water, producing drinking water and purifying valuable components. ADVANTAGE - The film is scraped by using wire rod coater, thereby ensuring large-scale scraping effect, and the scraped film is immersed in metal ion solution for cross-linking coordination, thereby improving stability of graphene oxide-tannic acid two-dimensional film, and through variety of characterization methods, the morphology and underwater oleophobic and hydrophobic properties of composites are revealed, thereby improving nanofiltration performance of pollutants in water, and the metal ion utilized has enhanced antibacterial property, and improves the antibacterial effect of graphene oxide-tannic acid two-dimensional film.