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Moon, Hoi Ri
Functional Inorganic Nanomaterials for Energy Lab (FINE)
Research Interests
  • Inorganic-organic hybrid materials, carbon capture materials, hydrogen storage materials, heterogeneous catalyst

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Selective Hydrogen Isotope Separation via Breathing Transition in MIL-53(Al)

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Title
Selective Hydrogen Isotope Separation via Breathing Transition in MIL-53(Al)
Author
Kim, Jin YeongZhang, LindaBalderas-Xicohténcatl, RafaelPark, JaewooHirscher, MMoon, Hoi RiOh, Hyunchul
Issue Date
201712
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.139, no.49, pp.17743 - 17746
Abstract
Breathing of MIL-53(Al), a flexible metal–organic framework (MOF), leads to dynamic changes as narrow pore (np) transitions to large pore (lp). During the flexible and reversible transition, the pore apertures are continuously adjusted, thus providing the tremendous opportunity to separate mixtures of similar-sized and similar-shaped molecules that require precise pore tuning. Herein, for the first time, we report a strategy for effectively separating hydrogen isotopes through the dynamic pore change during the breathing of MIL-53(Al), a representative of flexible MOFs. The experiment shows that the selectivity for D2 over H2 is strongly related to the state of the pore structure of MIL-53(Al). The highest selectivity (SD2/H2 = 13.6 at 40 K) was obtained by optimizing the exposure temperature, pressure, and time to systematically tune the pore state of MIL-53(Al).
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DOI
http://dx.doi.org/10.1021/jacs.7b10323
ISSN
0002-7863
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