Eliminating lattice defects in UiO-66-NH2 membrane towards high-precision desalination
Zirconium-based MOF membranes exhibit significant potential in energy-efficient desalination. Nevertheless, framework defect elimination, which represents an effective protocol to enhance their molecular sieving capacity and operation stability, remains highly challenging to date. In this study, we...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co. Ltd.
2025-01-01
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| Series: | Advanced Membranes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772823425000168 |
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| Summary: | Zirconium-based MOF membranes exhibit significant potential in energy-efficient desalination. Nevertheless, framework defect elimination, which represents an effective protocol to enhance their molecular sieving capacity and operation stability, remains highly challenging to date. In this study, we proposed a framework defect patching strategy to prepare robust UiO-66-NH2 membrane with Zr6O4(OH)4(OAc)12 cluster source towards high-efficiency desalination. Ion sieving results indicated that increasing reaction temperature and ratio of ligand to Zr6O4(OH)4(OAc)12 cluster contributed to framework defect elimination. UiO-66-NH2 membranes prepared under optimized conditions exhibited superior metal ion rejection rate (Al3+: 97.7 %) and operation stability over 20 days. Particularly, their water/NaCl separation performance well exceeded majority of reported polycrystalline 3D membranes, offering promising prospects for modulating molecular diffusion kinetics in MOF pores. |
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| ISSN: | 2772-8234 |