▎ 摘　　要

NOVELTY - Preparation of composite carbon material film involves uniformly mixing the graphene oxide and carboxylated carbon nanotubes in the dispersant to prepare a graphene oxide-carbon nanotube mixture, scraping the graphene oxide-carbon nanotube mixture on a substrate, removing the dispersant in the graphene oxide-carbon nanotube mixture to prepare composite carbon material film precursor, and using UV light to reduce the graphene oxide in the composite carbon material film precursor in a reducing gas atmosphere. USE - Preparation of film used for preparing composite carbon material nanofiltration film (all claimed). ADVANTAGE - The method utilizes carboxylated carbon nanotubes having increased interlayer spacing between graphene oxide sheets, increased water flux of the membrane, and unreduced graphene oxide and carboxylated carbon nanotubes which uniformly coats surface separation layer on the base film by knife coating. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) composite carbon material film; (2) composite carbon material nanofiltration film, which comprises base film and composite carbon material film arranged on the base film. The base film is an ultrafiltration film; and (3) preparation method of composite carbon material nanofiltration film.