▎ 摘　　要

NOVELTY - A graphene-alumina ceramic nanocomposite filter film comprises alumina ceramic film with graphene layer on at least one side surface. The filter film has pore size of 1-2 nm. USE - Graphene-alumina ceramic nanocomposite filter film used for concentrating or purifying organic matter aqueous solution. ADVANTAGE - The filter film has good hydrophobicity, large flux, high interception rate, and simple, convenient and practical operation, will not block film aperture, can effectively trap water molecules, resists pollution, and is easy to clean. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of the graphene-alumina ceramic nanocomposite filter film comprising setting alumina ceramic film, growing graphene on at least one side surface of alumina ceramic film and performing chemical vapor deposition; and (2) concentrating or purifying organic matter aqueous solution comprising taking organic matter aqueous solution comprising ethanol, methanol and other alcohols, or acetic acid, formic acid, propionic acid and other acids, passing through the graphene-alumina ceramic nanocomposite filter film, separating and concentrating.