Nguyen, Que Thi Lee, Jun Young Bae, Yejin Lee, Yu-Ri Song, Younghan Kim, Sang Hoon Baek, Kyung-Youl Na, Jongbeom 2024-11-30T06:30:29Z 2024-11-30T06:30:29Z 2024-11-30 2025-02 1864-5631 https://pubs.kist.re.kr/handle/201004/151224 This study demonstrated a simple and innovative way of using the direct de novo synthesis to fabricate the mesoporous structure and diverse functionality of ZIF-8 for environmental cleanup and gas storage applications. By introducing different ligands, we have developed a version of ZIF-8 that could better capture carbon dioxide (CO2) and iodine. The ZIF-8 was successfully designed to have the hierarchical and mesoporous structure with the functional groups of amine and thiol groups by adjusting the pKa values (from 8 to 12) of ligand instead of the original ligand, 2-methyl imidazole (Hmim, pK(a)similar to 14.2). The modulation of ZIF-8 particle size, porosity, and functional characteristics was achieved through varied ligands and their concentrations, streamlined into a single and room-temperature synthesis condition. The resulting ZIF-8 materials exhibit intricate hierarchical architectures and a high density of functional groups, significantly enhancing molecular diffusion and accessibility. Among the developed materials, ZIF-8-AS, featuring both amine and thiol groups, demonstrates the fastest adsorption kinetics and a twofold increase in iodine adsorption capacity (q(m)=1101.5 mg g(-1)) compared to ZIF-8 (q(m)=514.3 mg g(-1)). Furthermore, the hierarchical mesoporosity of ZIF-8-A-10.1 improves CO2 adsorption to 1.0 mmol g(-1) at 298 K, which is 1.3 times higher than that of the microporous ZIF-8. English Wiley - V C H Verlag GmbbH & Co. Multifunctional and Hierarchical Porous ZIF-8: Amine and Thiol Tagged via Mixed Multivariate Ligand Strategies for Enhanced CO2 and Iodine Adsorption Article 10.1002/cssc.202401968 1 ChemSusChem, v.18, no.4 ChemSusChem 18 4 N scie scopus 001355470000001 2-s2.0-85208276691 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article ZEOLITIC IMIDAZOLATE FRAMEWORK METAL-ORGANIC FRAMEWORKS TEMPLATING SYNTHESIS HOLLOW SPHERES EXCHANGE CAPTURE STABILITY Metal-organic framework Multifunctional groups ZIF-8 Adsorption Mesoporous materials