▎ 摘　　要

NOVELTY - Graphene oxide / polyaniline composite film comprises a substrate, graphene oxide, and polyaniline grafted on a surface of the film. USE - Graphene oxide / polyaniline composite film. ADVANTAGE - The graphene oxide / polyaniline composite film has the advantages of simple preparation process, low cost, and good purification effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene oxide into a film, and then immersing it into a mixed acid solution of aniline and ammonium persulfate, after reacting for a certain period of time, taking out and cleaning the surface polyaniline to obtain a graphene oxide / polyaniline composite film.