Journal article
Influence of surface chemistry and channel shapes on the lithium-ion separation in metal-organic-framework-nanochannel membranes
Journal of membrane science, Vol.674
15/05/2023
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Abstract
Metal-organic-framework-based channel (MOFC) membranes have great potential in ion separation due to their high flexibility than polycrystalline MOF membranes. Although a few single-MOFC membranes with high ion selectivity and permeability have been reported, the scale-up of MOFC membranes from single-channel membranes to multichannel membranes remains a challenge as defects with the system are escalated, limiting their practical application. Minimizing defects in multichannel MOFC membranes is the key to solving this scale-up challenge. Herein, the surface chemistry of polyethylene terephthalate (PET) nanochannel substrate was firstly tuned by a chemical modification to enhance the binding between the PET nanochannel walls and UiO-66-(COOH)2 MOF crystals. Further investigation of the influences of PET nanochannels' size, shape, and channel density on the selectivity revealed that the cylindrical and ethylenediamine (EDA)-functionalized single PET-UiO-66-(COOH)2 MOFC membrane exhibited an ultrahigh Li+/Mg2+ selectivity of 3077-fold over those of previous single-MOFC works. Furthermore, cylindrical, EDA-functionalized, multichannel UiO-66-(COOH)2 MOFC membranes with a channel density of 106/cm2 have been fabricated to achieve 50-fold Li+/Mg2+ selectivity and a vast enhancement of Li + conductance for 6 orders of magnitude. As the first example of scaling up the MOFC membrane, this work provides a fundamental basis and experimental techniques for MOF membrane synthesis and lithium-ion extractions.
Details
- Title
- Influence of surface chemistry and channel shapes on the lithium-ion separation in metal-organic-framework-nanochannel membranes
- Creators
- Jue Hou - CSIRO ManufacturingHuacheng Zhang - Royal Melbourne Institute of Technology UniversityJun Lu - Monash UniversityXingya Li - University of Science and Technology of ChinaChen Zhao - Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria, 3000, AustraliaHuanting Wang - Monash UniversityAaron W. Thornton - CSIRO ManufacturingKristina Konstas - CSIRO Manufacturing
- Publication Details
- Journal of membrane science, Vol.674
- Publisher
- Elsevier B.V
- Identifiers
- 991013092678202368
- Copyright
- © 2023 Elsevier B.V. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering; Science
- Language
- English
- Resource Type
- Journal article