2015
DOI: 10.1002/adma.201504784
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Ultraselective Gas Separation by Nanoporous Metal−Organic Frameworks Embedded in Gas‐Barrier Nanocellulose Films

Abstract: Metal-organic frameworks (MOFs) are synthesized at carboxy groups on crystalline TEMPO-oxidized cellulose nanofibers (TOCNs). MOF-TOCN films coated on a paper filter have a hierarchical structure from the nano- to macroscale, and demonstrate a high CO2 /CH4 selectivity, over 120 for CO2 at a high gas flux, by the combination of the nanoporous MOFs and the gas-barrier TOCNs, which have strong affinity with each other.

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Cited by 121 publications
(59 citation statements)
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“…Absorption bands in the 1500–800 cm −1 spectral region are attributed to CH, OH, CO, and COC vibrations of the glucosidic ring, representing the fingerprint of the cellulose. The peak corresponding to the carboxylate groups of TOCNF at 1600 cm −1 broadens and shifts to a lower wavenumber, which could be related to the interaction of ZIF‐8 with carboxylate groups . In the spectra of CelloZIF8s and CelloZIF8‐Curs, the presence of imidazole molecule is associated with the emergence of peaks around 1580 cm −1 (CN stretch mode), bands at 1300–1500 cm −1 (entire ring stretching) and 2904 cm −1 due to the aliphatic CH stretch of the imidazole .…”
Section: Resultsmentioning
confidence: 99%
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“…Absorption bands in the 1500–800 cm −1 spectral region are attributed to CH, OH, CO, and COC vibrations of the glucosidic ring, representing the fingerprint of the cellulose. The peak corresponding to the carboxylate groups of TOCNF at 1600 cm −1 broadens and shifts to a lower wavenumber, which could be related to the interaction of ZIF‐8 with carboxylate groups . In the spectra of CelloZIF8s and CelloZIF8‐Curs, the presence of imidazole molecule is associated with the emergence of peaks around 1580 cm −1 (CN stretch mode), bands at 1300–1500 cm −1 (entire ring stretching) and 2904 cm −1 due to the aliphatic CH stretch of the imidazole .…”
Section: Resultsmentioning
confidence: 99%
“…The TOCNF has a typical cellulose I crystal structure and is selected due to its unique properties, such as high aspect ratio (>100), negative zeta potential (≈−75 mV in water), good mechanical performance, gel formation capabilities, and 3D printability . The presence of anionic charge on TOCNF surfaces will facilitate the interaction of metal cations with TOCNFs, which serve as a substrate for direct growth of MOFs . Zeolitic imidazolate framework (ZIF‐8) and MIL‐100 (Fe) (MIL = Materials Institute of Lavoisier) have been investigated as MOF models.…”
Section: Introductionmentioning
confidence: 97%
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“…Thus, it is regarded as a suitable alternative to save the tremendous energy of distillation-based separation. Metal-organic frameworks (MOFs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], a class of promising porous materials, offer promise for gas storage and separation due to their highly versatile nature in pore structure and functionalization [24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Some accomplished pore tuning strategies were used to directly increase the pore sizes within MOFs aiming at gas storage at high pressure.…”
Section: Introductionmentioning
confidence: 99%
“…Matsumoto et al developed a ZIF-90/nanocellulose hybrid membrane by in-situ growth of the MOF particles on the nanocellulose fiber surfaces [94]. The nanocellulose fibers were treated via a TEMPO-mediated oxidation process.…”
Section: Nanocellulose/metal Organic Framework Hybrid Membranesmentioning
confidence: 99%