Enhanced capacity in cellulose aerogel for carbon dioxide capture through modified by metal–organic framework and organic amine

Carbon dioxide (CO 2 ) is one of the main greenhouse gases that contribute to global warming. CO 2 capture technology is urgently needed to mitigate its impact on society and ecosystems. Researchers use cellulose-based materials to adsorb CO 2 , exploring its potential in gas separation and capture. This study centered its efforts on advancing the development of cellulose aerogels capable of synergistically adsorbing CO 2 by utilizing amino groups and metal–organic frameworks. Cellulose aerogels were prepared by incorporating epichlorohydrin as a cross-linking agent along with metal–organic frameworks and functionalized polyethyleneimine. The nitrogen adsorption–desorption isotherms were tested at 77 K and 1 bar, and the sample exhibited typical adsorption curves of mesoporous materials. The specific surface area of the sample underwent calculation using the Brunauer-Emmett-Teller (BET) equation, resulting in a specific surface area value of 153.1 m 2 /g, which represents a 230 % increase compared to the pre-modification state. At 298 K and 1 bar, it can adsorb a maximum of 9.26 mmol/g of CO 2 . This study has established a new foundation for cellulose-based CO 2 capture and contributes to the high-value utilization of bamboo resources.