The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes
Two-dimensional covalent organic frameworks (2D-COFs) have well-defined porosity and stability. Herein, we demonstrate that 2D-COFs can have three roles in nanolaminated graphene membranes for organic solvent nanofiltration (OSN). The optimized hybrid nanolaminate, assembled from 2D-COFs and reduced...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/159785 |
| _version_ | 1824456084460404736 |
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| author | Sui, Xiao Wang, Yu Liu, Fei Yuan, Ziwen Wang, Cheng Yu, Yanxi Zhou, Kun Goh, Kunli Chen, Yuan |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Sui, Xiao Wang, Yu Liu, Fei Yuan, Ziwen Wang, Cheng Yu, Yanxi Zhou, Kun Goh, Kunli Chen, Yuan |
| author_sort | Sui, Xiao |
| collection | NTU |
| description | Two-dimensional covalent organic frameworks (2D-COFs) have well-defined porosity and stability. Herein, we demonstrate that 2D-COFs can have three roles in nanolaminated graphene membranes for organic solvent nanofiltration (OSN). The optimized hybrid nanolaminate, assembled from 2D-COFs and reduced graphene oxide (rGO), shows a 162% enhancement in methanol permeance without sacrificing selectivity. When dry, intercalated 2D-COFs serve as a nanospacer to prevent the restacking of rGO. However, when wetted, 2D-COFs assume the additional roles of a stabilizer and a porous filler material. 2D-COFs alleviate rGO swelling in solvents because of a solvation-driven charge redistribution at the COF/rGO interface, which induces an attractive stabilizing force between COF and rGO nanosheets. Further, 2D-COFs can reduce transport pathway length by 15.5% and deliver “shortcuts” for solvent permeance. This work unravels the tripartite role of 2D-COFs as nanospacers/stabilizers/porous fillers, offering new insights into shaping the development of hybrid nanolaminated membranes for OSN. |
| first_indexed | 2025-02-19T03:48:29Z |
| format | Journal Article |
| id | ntu-10356/159785 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:48:29Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1597852022-07-02T11:51:15Z The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes Sui, Xiao Wang, Yu Liu, Fei Yuan, Ziwen Wang, Cheng Yu, Yanxi Zhou, Kun Goh, Kunli Chen, Yuan School of Mechanical and Aerospace Engineering Nanyang Environment and Water Research Institute Environmental Process Modelling Centre Singapore Membrane Technology Centre Engineering::Environmental engineering Covalent Organic Framework Graphene Oxide Two-dimensional covalent organic frameworks (2D-COFs) have well-defined porosity and stability. Herein, we demonstrate that 2D-COFs can have three roles in nanolaminated graphene membranes for organic solvent nanofiltration (OSN). The optimized hybrid nanolaminate, assembled from 2D-COFs and reduced graphene oxide (rGO), shows a 162% enhancement in methanol permeance without sacrificing selectivity. When dry, intercalated 2D-COFs serve as a nanospacer to prevent the restacking of rGO. However, when wetted, 2D-COFs assume the additional roles of a stabilizer and a porous filler material. 2D-COFs alleviate rGO swelling in solvents because of a solvation-driven charge redistribution at the COF/rGO interface, which induces an attractive stabilizing force between COF and rGO nanosheets. Further, 2D-COFs can reduce transport pathway length by 15.5% and deliver “shortcuts” for solvent permeance. This work unravels the tripartite role of 2D-COFs as nanospacers/stabilizers/porous fillers, offering new insights into shaping the development of hybrid nanolaminated membranes for OSN. Economic Development Board (EDB) Nanyang Technological University The authors are grateful for funding support from the Australian Research Council under the Future Fellowships scheme (FT160100107) . K.Z. and Y.W. acknowledge financial support from the Nanyang Environment and Water Research Institute (Core Fund) , Nanyang Technological University, Singapore. K.G. thanks the Singapore Economic Development Board for funding support for the Singapore Membrane Technology Centre. 2022-07-02T11:51:15Z 2022-07-02T11:51:15Z 2021 Journal Article Sui, X., Wang, Y., Liu, F., Yuan, Z., Wang, C., Yu, Y., Zhou, K., Goh, K. & Chen, Y. (2021). The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes. Matter, 4(9), 2953-2969. https://dx.doi.org/10.1016/j.matt.2021.06.043 2590-2385 https://hdl.handle.net/10356/159785 10.1016/j.matt.2021.06.043 2-s2.0-85120522049 9 4 2953 2969 en Matter © 2021 Elsevier Inc. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Covalent Organic Framework Graphene Oxide Sui, Xiao Wang, Yu Liu, Fei Yuan, Ziwen Wang, Cheng Yu, Yanxi Zhou, Kun Goh, Kunli Chen, Yuan The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title | The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title_full | The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title_fullStr | The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title_full_unstemmed | The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title_short | The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes |
| title_sort | tripartite role of 2d covalent organic frameworks in graphene based organic solvent nanofiltration membranes |
| topic | Engineering::Environmental engineering Covalent Organic Framework Graphene Oxide |
| url | https://hdl.handle.net/10356/159785 |
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