▎ 摘　　要

NOVELTY - Preparing amino graphene thin film involves preparing graphene oxide which is lyophilized. The lyophilized amino graphene oxide is homogeneously dispersed in N, N-dimethylformamide (DMF) solution utilizing polytetrafluoroethylene film by vacuum filtration and small amount of activator is added. The activator activates oxygen radicals in graphene oxide. The diamine compound and the activated oxygen radicals react to form chemical bonds to obtain amino graphene oxide sheets that are washed, dried, and purified to obtain amino graphene thin film. USE - Method for preparing amino graphene thin film used for adsorption of inorganic ions, capturing carbon dioxide molecules and desalination of sea water (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of using amino graphene film, which involves placing amino graphene film in vacuum filtration apparatus, preparing inorganic salt solution of different concentrations that are poured in vacuum filtration apparatus comprising graphene film, which adsorbs the inorganic ions and finally passing water through the apparatus.