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Ionic Liquids-Functionalized Zeolitic Imidazolate Framework for Carbon Dioxide Adsorption
oleh: Xuyan Song, Jialin Yu, Min Wei, Ran Li, Xi Pan, Guoping Yang, Haolin Tang
Format: | Article |
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Diterbitkan: | MDPI AG 2019-07-01 |
Deskripsi
Ionic-liquid-functionalized zeolitic imidazolate frameworks (ZIF) were synthesized using the co-ligands of 2-methylimidazole and amine-functionalized ionic liquid during the formation process of frameworks. The resulting ionic-liquid-modified ZIF had a specific surface area of 1707 m<sup>2</sup>·g<sup>−1</sup> with an average pore size of about 1.53 nm. Benefiting from the large surface area and the high solubility of carbon dioxide in ionic-liquid moieties, the synthesized materials exhibited a carbon dioxide adsorption capacity of about 24.9 cm<sup>3</sup>·g<sup>−1</sup>, whereas it was 16.3 cm<sup>3</sup>·g<sup>−1</sup> for pristine ZIF at 25 °C under 800 mmHg. The results demonstrate that the modification of porous materials with ionic liquids could be an effective way to fabricate solid sorbents for carbon dioxide adsorption.