Incorporation of 1-ethyl-3-methyl-imidazolium acetate into UiO-66 as an efficient sorbent for carbon dioxide capture. (4th January 2023)

• Record Type: Journal Article
• Authors: Nie, Shiyu; Chen, Fengfeng; Shen, Tianbo; Wang, Tingting; Di, Ningyu; Gao, Junkuo
• Is Part Of: New journal of chemistry. Volume 47:Number 5(2023)
• Page Start: 2257
• Page End: 2263
• Publication Date: 2023-01-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj05826j
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : [Emim][Ac] was incorporated in the pore of UiO-66 for highly efficient CO2 /N2 separation. Abstract : Adjusting the internal porous environment of MOFs to enhance their adsorption properties is considered an effective strategy to improve their gas separation performance. Herein, 1-ethyl-3-methyl-imidazolium acetate ([Emim][Ac]) was encapsulated in UiO-66 by an impregnation method for the improvement of carbon dioxide (CO2 ) capture performance. The synthesis and detailed characterizations of the developed [Emim][Ac]@UiO-66 are reported, and the effect of the loading amount of [Emim][Ac] on the CO2 separation performance was also studied. The obtained [Emim][Ac]@UiO-66 could efficiently show the synergistic effect of the adsorption of CO2 between [Emim][Ac] and UiO-66. The optimized [Emim][Ac]@UiO-66 exhibited a much higher CO2 adsorption capacity at 298 K and 1.0 bar, affording 2 times the CO2 uptake than its original UiO-66. In addition, the CO2 /N2 selectivity and CO2 /CH4 selectivity of [Emim][Ac]@UiO-66-3.5% are significantly higher than those of UiO-66. This study for designing various MOF-encapsulated ionic liquids potentially paves the way for the development of highly efficient absorbents for gas separations.