Hierarchical Metal-Organic Aerogel as a Highly Selective and Sustainable CO2 Adsorbent
- Authors
- 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
- Issue Date
- 2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- hierarchical metal-organic aerogel; microporous materials; metal-organic gel; paddle-wheel structure; reusable CO2 adsorbents; gas selectivity
- Citation
- ACS APPLIED MATERIALS & INTERFACES
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/147085
- DOI
- 10.1021/acsami.2c14453
- ISSN
- 1944-8244
- Abstract
- 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.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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