▎ 摘　　要

NOVELTY - The preparation of three-dimensional graphene oxide-based carbon dioxide adsorbent involves (1) performing homogeneous dispersion of commercial graphene oxide in a solution of triethyl orthoacetate, and ultrasonically processing, (2) adding toluene sulfonic acid to the solution to-be-used, placing in a hydrothermal reactor, reacting, cooling, and centrifugally separating the precipitate in the solution, (3) dispersing precipitate in deionized water, ultrasonically processing, adding 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, uniformly stirring, adding hydroxybenzotriazole, oscillating and stirring until dissolved, ultrasonically processing, and centrifugally separating precipitate, (4) dispersing the precipitate in methanol solution, adding long-chain amine compound, ultrasonically treating, and centrifugally separating precipitate, and (5) dispersing the precipitate in deionized water, ultrasonically treating, vacuum freeze-drying, and drying the obtained precipitate. USE - Preparation method of three-dimensional graphene oxide-based carbon dioxide adsorbent. ADVANTAGE - The method enables preparation of three-dimensional graphene oxide-based carbon dioxide adsorbent with excellent performance, reduced preparation difficulty, and improved adsorption performance, which reduces adsorption-desorption diffusion resistance, accelerates the adsorption and desorption rate, and increases the adsorption selectivity and adsorption amount of the adsorbent to carbon dioxide, by simple process. DETAILED DESCRIPTION - The preparation method of three-dimensional graphene oxide-based carbon dioxide adsorbent involves (1) weighing a certain amount of commercial graphene oxide, performing homogeneous dispersion in a solution of triethyl orthoacetate with concentration of 3-5 mg/1 ml, and ultrasonically processing for 10-30 minutes, (2) adding toluene sulfonic acid having mass of 0.02 times of graphene oxide to the solution to-be-used, placing in a hydrothermal reactor, reacting for 36-48 hours under the condition of 403 K, cooling to room temperature, and centrifugally separating the precipitate in the solution, (3) dispersing the precipitate obtained in step (2) in deionized water with concentration of 1-4 mg/1 ml, ultrasonically processing for 10-30 minutes, adding 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide with mass of 2-3 times that of graphene oxide, uniformly stirring, adding hydroxybenzotriazole with the mass of 2-3 times of graphene oxide, oscillating and vigorously stirring until completely dissolved, ultrasonically processing for 6-24 hours, and centrifugally separating the precipitate, (4) dispersing the precipitate in methanol solution with concentration of 3-5 mg/1 ml, adding long-chain amine compound having 10 times the mass of graphene oxide, ultrasonically treating for 12 hours, and centrifugally separating the precipitate, and (5) dispersing the precipitate obtained in step (4) in deionized water with concentration of 1-5 mg/ml, ultrasonically treating for 20 minutes, vacuum freeze-drying for 24 hours, and drying the obtained precipitate.