Academic Journal
Engineering of Covalent Organic Framework Nanosheet Membranes for Fast and Efficient Ion Sieving: Charge‐Induced Cation Confined Transport
| العنوان: | Engineering of Covalent Organic Framework Nanosheet Membranes for Fast and Efficient Ion Sieving: Charge‐Induced Cation Confined Transport |
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| المؤلفون: | Wang, Rui, Ding, Li, Xue, Jian, Wu, Haoyu, Cai, Chengzhi, Qiao, Zhiwei, Caro, Jürgen, Wang, Haihui |
| المساهمون: | National Key Research and Development Program of China, National Natural Science Foundation of China, China Postdoctoral Science Foundation |
| المصدر: | Small Methods ; ISSN 2366-9608 2366-9608 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2024 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | Artificial membranes with ion‐selective nanochannels for high‐efficiency mono/divalent ion separation are of great significance in water desalination and lithium‐ion extraction, but they remain a great challenge due to the slight physicochemical property differences of various ions. Here, the successful synthesis of two‐dimensional TpEBr‐based covalent organic framework (COF) nanosheets, and the stacking of them as consecutive membranes for efficient mono/divalent ion separation is reported. The obtained COF nanosheet membranes with intrinsic one‐dimensional pores and abundant cationic sites display high permeation rates for monovalent cations (K + , Na + , Li + ) of ≈0.1–0.3 mol m −2 h −1 , while the value of divalent cations (Ca 2+ , Mg 2+ ) is two orders of magnitude lower, resulting in an ultrahigh mono/divalent cation separation selectivity up to 130.4, superior to the state‐of‐the‐art ion sieving membranes. Molecular dynamics simulations further confirm that electrostatic interaction controls the confined transport of cations through the cationic COF nanopores, where multivalent cations face i) strong electrostatic repulsion and ii) steric transport hindrance since the large hydrated divalent cations are retarded due to a layer of strongly adsorbed chloride ions at the pore wall, while smaller monovalent cations can swiftly permeate through the nanopores. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/smtd.202401111 |
| الاتاحة: | http://dx.doi.org/10.1002/smtd.202401111 https://onlinelibrary.wiley.com/doi/pdf/10.1002/smtd.202401111 |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.CA50F6E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/smtd.202401111 |
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