Lee, Heehyeon Oh, Jongwon Koo, Jin Young Ohtsu, Hiroyoshi Jin, Hyeong Min Kim, Soyoung Lee, Jae-Seung Kim, Hyunchul Choi, Hee Cheul Oh, Youngtak Yoon, Seok Min 2024-01-19T11:02:14Z 2024-01-19T11:02:14Z 2022-10-20 2022-10 1944-8244 https://pubs.kist.re.kr/handle/201004/114492 Typical amorphous aerogels pose great potential for CO2 adsorbents with high surface areas and facile diffusion, but they lack well-defined porosity and specific selectivity, inhibiting utilization of their full functionality. To assign well-defined porous structures to aerogels, a hierarchical metal-organic aerogel (HMOA) is designed, which consists of well-defined micropores (d similar to 1 nm) by coordinative integration with chromium(III) and organic ligands. Due to its hierarchical structure with intrinsically flexible coordination, the HMOA has excellent porous features of a high surface area and a reusable surface with appropriate binding energy for CO2 adsorption. The HMOA features high CO2 adsorption capacity, high CO2/N2 IAST selectivity, and vacuum-induced surface regenerability (100% through 20 cycles). Further, the HMOA could be prepared via simple ambient drying methods while retaining the microporous network. This unique surface-tension-resistant micropore formation and flexible coordination systems of HMOA make it a potential candidate for a CO2 adsorbent with industrial scalability and reproducibility. English American Chemical Society Hierarchical Metal-Organic Aerogel as a Highly Selective and Sustainable CO2 Adsorbent Article 10.1021/acsami.2c14453 1 ACS Applied Materials & Interfaces, v.14, no.41, pp.46682 - 46694 ACS Applied Materials & Interfaces 14 41 46682 46694 N scie scopus 000866254400001 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article CARBON-DIOXIDE CAPTURE ISOSTERIC HEATS GAS-ADSORPTION FRAMEWORK FABRICATION GELS SPECTROSCOPY SURFACES STRATEGY CAPACITY reusable CO2 adsorbents gas selectivity hierarchical metal-organic aerogel microporous materials metal-organic gel paddle-wheel structure