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김채운

Kim, Chae Un
High Pressure X-ray Science Lab.
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Creating Tunable Mesoporosity by Temperature‐Driven Localized Crystallite Agglomeration

Author(s)
Jeong, SeokSim, YoujungKim, Jin KyunShin, SunyoungLim, JaewoongSeong, JunmoLee, SeonghwanMoon, DohyunBaek, Seung BinKim, Chae UnRyu, Ja-HyoungLah, Myoung Soo
Issued Date
2022-02
DOI
10.1002/smll.202107006
URI
https://scholarworks.unist.ac.kr/handle/201301/57146
Citation
SMALL, v.18, no.7, pp.2107006
Abstract
A new synthetic approach for tunable mesoporous metal–organic frameworks (MeMs) is developed. In this approach, mesopores are created in the process of heat conversion of highly mosaic metal–organic framework (MOF) crystals with non-interpenetrated low-density nanocrystallites into MOF crystals with two-fold interpenetrated high-density nanocrystallites. The two-fold interpenetration reduces the volume of the nanocrystallites in the mosaic crystal, and the accompanying localized agglomeration of the nanocrystallites results in the formation of mesopores among the localized crystallite agglomerates. The pore size can be easily modulated from 7 to 90 nm by controlling the heat treatment conditions, that is, the aging temperature and aging time. Various proteins can be encapsulated in the MeM, and immobilized enzymes show catalyst activity comparable to that of the free native enzymes. Immobilized β-galactosidase is recyclable and the enzyme activity of the immobilized catalase is maintained after exposure to high temperatures and various organic solvents.
Publisher
Wiley - V C H Verlag GmbbH & Co.
ISSN
1613-6810
Keyword (Author)
enzyme immobilizationlocalized crystallite agglomerationmesoporositymetal–organic frameworksnanocrystallite

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