Ultramicroporous hydrogen-bond decorated robust metal-organic framework for high xenon capture performances

Minjung Kang, Jong Hyeak Choe, Hyojin Kim, Hongryeol Yun, Dae Won Kim, Chang Seop Hong

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Despite efforts to isolate industrially valuable Xe (xenon) and Kr (krypton), porous materials that satisfy high selectivity and uptake and the proper structural integrity in wet environments remain underdeveloped. We report an ultramicroporous metal-organic framework (MOF), Ni(AIN)2 (HAIN = 3-aminoisonicotinic acid), which is favorable for the preferential adsorption of Xe. Notably, the amino groups form intra- and inter-net hydrogen bonds within the Ni(AIN)2 structure, imparting structural stability even under wet conditions. Henry's selectivity and the Xe uptake at 0.2 bar were respectively 23.19 and 57.33 cm3 g−1, falling into an ideal performance regime. Breakthrough experiments showed that under dry and humid conditions, the dynamic separation efficiency of Ni(AIN)2 was maintained without any structural collapse. Thus, we provide a feasible design strategy for MOF adsorbents to achieve the desired Xe uptake, Xe/Kr selectivity, and structural stability.

Original languageEnglish
Pages (from-to)24824-24830
Number of pages7
JournalJournal of Materials Chemistry A
Volume10
Issue number46
DOIs
Publication statusPublished - 2022 Nov 17

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF-2021R1A2B5B03086313) and the Priority Research Centers Program (NRF-2019R1A6A1A11044070). The X-ray crystallographic data was collected at the Pohang Accelerator Laboratory (PLS-II BL2D SMC).

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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