Pore Tuning of Metal-Organic Framework Membrane Anchored on Graphene-Oxide Nanoribbon
- Authors
- Choi, Eunji; Hong, Sung Jun; Kim, Yong-Jae; Choi, Seung Eun; Choi, Yunkyu; Kim, Ji Hoon; Kang, Junhyeok; Kwon, Ohchan; Eum, Kiwon; Han, Byungchan; Kim, Dae Woo
- Issue Date
- Apr-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- gas separation; graphene oxide nanoribbons; membrane; metal& #8208; organic frameworks; pore tuning
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.31, no.17
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 31
- Number
- 17
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/40741
- DOI
- 10.1002/adfm.202011146
- ISSN
- 1616-301X
- Abstract
- Although the pore structures and gas transport properties of metal-organic frameworks (MOFs) have been tuned mainly by modifying the framework building blocks, a pore-tuned zeolitic imidazolate framework (ZIF)-8 layer is directly grown on graphene oxide nanoribbons (GONR)-treated polymer substrate. Oxygen-containing functional groups and GONR dangling-carbon bonds facilitated the spontaneous growth of ZIF-8 oriented to the (100) grain on the GONR surface and also enhanced the rigidity by strongly anchoring the ZIF-8 layer by metal-carbon chemisorption. Gas permeation and molecular simulation results confirmed that the effective aperture size of ZIF-8 is adjusted to 3.6 angstrom. As a result, ultrafast H-2 permeance of 7.6 x 10(-7) mol m(-2) Pa s is achieved while blocking large hydrocarbon molecules. In particular, the membrane showed exceptionally enhanced hydrogen selectivity for the mixture separation than ideal selectivity, owing to the competitive transport between H-2 and large hydrocarbon molecules, and the separation performance surpassed those of ZIF membranes previously fabricated on polymeric supports.
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