▎ 摘　　要

NOVELTY - Preparing a transition metal ion modified graphene oxide film, comprises mixing and shaking the graphene oxide film solution and the inorganic salt solution containing transition metal ions to obtain a mixed solution, using alumina ceramic sheets as a supporting substrate, preparing a transition metal ion-modified graphene oxide film by vacuum filtration, drying and obtaining a graphene oxide film modified with transition metal ions. USE - The method for preparing transition metal ion modified graphene oxide film useful for processing the gas mixture, and purifying the gas (claimed). ADVANTAGE - The method has simple preparation process, easy operation, and the obtained transition metal ion modified graphene oxide film has high mechanical strength, not easy to be damaged, can be used repeatedly, and has high gas flux, which can effectively remove the volatile aromatic compound in the air and has good application prospect in the chemical industry, medical treatment and industrial field. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an oxide graphene film modified by transition metal ion, obtained by the method as mentioned above.