▎ 摘　　要

NOVELTY - Preparation of diamine-modified metal organic framework (MOF)/graphene oxide olefin composite adsorbent, involves dispersing graphene oxide in aqueous solution, obtaining graphene oxide olefin and stripped graphene oxide, removing insoluble matter by centrifugation, and centrifuging remaining solution to obtain graphene oxide olefin, freeze-drying, using chemical cutting method to prepare graphene oxide olefin, adding obtained product to N,N-dimethylformamide and ethanol co-solvent and mixing, adding zirconium tetrachloride and aminoterephthalic acid, synthesizing graphene oxide olefin/ammonia-UiO-66 complex in-situ by microwave-assisted solvothermal method, activating graphene oxide olefin/ammonia-UiO-66 complex and removing solvent by supercritical carbon dioxide, adding obtained product to anhydrous hexane suspension, adding urea, filtering after refluxing under nitrogen atmosphere for 18 hours, washing with hexane, and drying at 50degrees Celsius for 24 hours under vacuum conditions. USE - Preparation of diamine-modified MOF/graphene oxide olefin composite adsorbent used for absorbing carbon dioxide (claimed). DETAILED DESCRIPTION - Preparation of diamine-modified MOF/graphene oxide olefin composite adsorbent, involves using graphene oxide as raw material, dispersing graphene oxide in aqueous solution and ultrasonically peeling off, where the ultrasonic frequency and time are 300 W and 2 hours, respectively, obtaining graphene oxide olefin and incompletely stripped graphene oxide, removing insoluble matter by centrifugation, and centrifuging remaining solution to obtain graphene oxide olefin of primary sieve, freeze-drying, using chemical cutting method to prepare graphene oxide olefin with 1-3 layers and surface size of 60-150 nm, adding obtained product to N,N-dimethylformamide and ethanol co-solvent and mixing, adding zirconium tetrachloride and aminoterephthalic acid, where the mass ratio of zirconium tetrachloride, aminoterephthalic acid and graphene oxide olefin is 1.4:1:0.05, synthesizing graphene oxide olefin/ammonia-UiO-66 complex in-situ by microwave-assisted solvothermal method, activating graphene oxide olefin/ammonia-UiO-66 complex and removing solvent by supercritical carbon dioxide, adding obtained product to anhydrous hexane suspension, adding urea, where the mass ratio of urea to graphene oxide olefin/ammonia-UiO-66 complex is (0.05-0.15):1, filtering after refluxing under nitrogen atmosphere for 18 hours, washing with hexane, and drying at 50degrees Celsius for 24 hours under vacuum conditions. An INDEPENDENT CLAIM is included for a device for absorbing carbon dioxide, which has an air inlet device, an air outlet device and a filter channel provided with an adsorbent packing layer, where the adsorbent packing layer is attached with the diamine modified MOF/graphene oxide olefin composite adsorbent.