Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation
Abstract Precise ions sieving at angstrom‐scale is gaining tremendous attention thanks to its significant impact at the water‐energy nexus. Herein, a novel polycation‐modulated interfacial polymerization (IP) strategy is developed to prepare a heterogeneously charged covalent organic frameworks (COF...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202405539 |
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| author | Shuting Xu Haibo Lin Guiliang Li Qiu Han Jianqiang Wang Fu Liu |
| author_facet | Shuting Xu Haibo Lin Guiliang Li Qiu Han Jianqiang Wang Fu Liu |
| author_sort | Shuting Xu |
| collection | DOAJ |
| description | Abstract Precise ions sieving at angstrom‐scale is gaining tremendous attention thanks to its significant impact at the water‐energy nexus. Herein, a novel polycation‐modulated interfacial polymerization (IP) strategy is developed to prepare a heterogeneously charged covalent organic frameworks (COFs) membrane. Cationic poly(diallyldimethylammonium chloride) (PDDA) regulates the growth and assembly of anionic COFs nanosheets, which thus provides a negative, smooth top surface and positive, rough bottom surface, indicating the presence of heterogeneously charged angstrom‐scale channels through the membrane. Experiments and simulations are conducted to understand the facilitated ions transport behavior relative to specific interactions raised by heterogeneously charged channels and angstrom‐scale steric hinderance as well, rendering the membrane with robust mono‐/divalent cations sieving capabilities. The selectivity (61.6) of Li+ to Mg2+ in mixed saline under the continuous cross‐flow filtration mode is superior to most of the reported nanofiltration membranes. This polycation‐mediated interfacial polymerization strategy offers a compelling opportunity to develop versatile heterogeneously charged COF membranes for exquisite ion sieving. |
| format | Article |
| id | doaj-art-8c109c133810448e8cb7af9f26adf3d7 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-8c109c133810448e8cb7af9f26adf3d72024-12-27T13:00:47ZengWileyAdvanced Science2198-38442024-12-011148n/an/a10.1002/advs.202405539Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions SeparationShuting Xu0Haibo Lin1Guiliang Li2Qiu Han3Jianqiang Wang4Fu Liu5Zhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaZhejiang International Joint Laboratory of Advanced Membrane Materials & Processes Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 ChinaAbstract Precise ions sieving at angstrom‐scale is gaining tremendous attention thanks to its significant impact at the water‐energy nexus. Herein, a novel polycation‐modulated interfacial polymerization (IP) strategy is developed to prepare a heterogeneously charged covalent organic frameworks (COFs) membrane. Cationic poly(diallyldimethylammonium chloride) (PDDA) regulates the growth and assembly of anionic COFs nanosheets, which thus provides a negative, smooth top surface and positive, rough bottom surface, indicating the presence of heterogeneously charged angstrom‐scale channels through the membrane. Experiments and simulations are conducted to understand the facilitated ions transport behavior relative to specific interactions raised by heterogeneously charged channels and angstrom‐scale steric hinderance as well, rendering the membrane with robust mono‐/divalent cations sieving capabilities. The selectivity (61.6) of Li+ to Mg2+ in mixed saline under the continuous cross‐flow filtration mode is superior to most of the reported nanofiltration membranes. This polycation‐mediated interfacial polymerization strategy offers a compelling opportunity to develop versatile heterogeneously charged COF membranes for exquisite ion sieving.https://doi.org/10.1002/advs.202405539angstrom channelscovalent organic frameworksheterostructuresion sievingtransport mechanisms |
| spellingShingle | Shuting Xu Haibo Lin Guiliang Li Qiu Han Jianqiang Wang Fu Liu Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation Advanced Science angstrom channels covalent organic frameworks heterostructures ion sieving transport mechanisms |
| title | Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation |
| title_full | Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation |
| title_fullStr | Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation |
| title_full_unstemmed | Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation |
| title_short | Heterogeneous Covalent Organic Framework Membranes Mediated by Polycations for Efficient Ions Separation |
| title_sort | heterogeneous covalent organic framework membranes mediated by polycations for efficient ions separation |
| topic | angstrom channels covalent organic frameworks heterostructures ion sieving transport mechanisms |
| url | https://doi.org/10.1002/advs.202405539 |
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