Please use this identifier to cite or link to this item:
https://doi.org/10.1021/jacs.9b13825
DC Field | Value | |
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dc.title | Ultrathin Two-Dimensional Membranes Assembled by Ionic Covalent Organic Nanosheets with Reduced Apertures for Gas Separation | |
dc.contributor.author | YING YUNPAN | |
dc.contributor.author | Tong, Minman | |
dc.contributor.author | NING SHOUCONG | |
dc.contributor.author | SAI KISHORE RAVI | |
dc.contributor.author | PEH SHING BO | |
dc.contributor.author | TAN SWEE CHING | |
dc.contributor.author | Pennycook,Stephen John | |
dc.contributor.author | Zhao Dan | |
dc.date.accessioned | 2020-06-10T04:54:11Z | |
dc.date.available | 2020-06-10T04:54:11Z | |
dc.date.issued | 2020-03-04 | |
dc.identifier.citation | YING YUNPAN, Tong, Minman, NING SHOUCONG, SAI KISHORE RAVI, PEH SHING BO, TAN SWEE CHING, Pennycook,Stephen John, Zhao Dan (2020-03-04). Ultrathin Two-Dimensional Membranes Assembled by Ionic Covalent Organic Nanosheets with Reduced Apertures for Gas Separation. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 142 (9) : 4472-4480. ScholarBank@NUS Repository. https://doi.org/10.1021/jacs.9b13825 | |
dc.identifier.issn | 0002-7863 | |
dc.identifier.issn | 1520-5126 | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/169609 | |
dc.description.abstract | © 2020 American Chemical Society. Covalent organic frameworks (COFs) are a promising category of porous materials possessing extensive chemical tunability, high porosity, ordered arrangements at a molecular level, and considerable chemical stability. Despite these advantages, the application of COFs as membrane materials for gas separation is limited by their relatively large pore apertures (typically >0.5 nm), which exceed the sieving requirements for most gases whose kinetic diameters are less than 0.4 nm. Herein, we report the fabrication of ultrathin two-dimensional (2D) membranes through layer-by-layer (LbL) assembly of two kinds of ionic covalent organic nanosheets (iCONs) with different pore sizes and opposite charges. Because of the staggered packing of iCONs with strong electrostatic interactions, the resultant membranes exhibit features of reduced aperture size, optimized stacking pattern, and compact dense structure without sacrificing thickness control, which are suitable for molecular sieving gas separation. One of the hybrid membranes, TpEBr@TpPa-SO3Na with a thickness of 41 nm, shows a H2 permeance of 2566 gas permeation units (GPUs) and a H2/CO2 separation factor of 22.6 at 423 K, surpassing the recent Robeson upper bound along with long-term hydrothermal stability. This strategy provides not only a high-performance H2 separation membrane candidate but also an inspiration for pore engineering of COF or 2D porous polymer membranes. | |
dc.language.iso | en | |
dc.publisher | AMER CHEMICAL SOC | |
dc.source | Elements | |
dc.subject | Science & Technology | |
dc.subject | Physical Sciences | |
dc.subject | Chemistry, Multidisciplinary | |
dc.subject | Chemistry | |
dc.subject | GRAPHENE OXIDE MEMBRANES | |
dc.subject | MOF MEMBRANES | |
dc.subject | FRAMEWORK NANOSHEETS | |
dc.subject | COMPOSITE MEMBRANES | |
dc.subject | CO2 CAPTURE | |
dc.subject | PERMEATION | |
dc.subject | TRANSPORT | |
dc.type | Article | |
dc.date.updated | 2020-06-02T09:15:21Z | |
dc.contributor.department | CHEMICAL & BIOMOLECULAR ENGINEERING | |
dc.contributor.department | MATERIALS SCIENCE AND ENGINEERING | |
dc.description.doi | 10.1021/jacs.9b13825 | |
dc.description.sourcetitle | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | |
dc.description.volume | 142 | |
dc.description.issue | 9 | |
dc.description.page | 4472-4480 | |
dc.published.state | Published | |
Appears in Collections: | Staff Publications Elements |
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File | Description | Size | Format | Access Settings | Version | |
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Zhao_2019_JACS_iCON membrane_manuscript.docx | Submitted version | 10.81 MB | Microsoft Word XML | OPEN | Post-print | View/Download |
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