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Sieving in order | Nature Materials
Designing highly ordered and ultrathin nanoporous membranes achieves superior water flux, while maintaining high selectivity for NaCl rejection.
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With climate change and population growth, securing water resources has become one of the greatest challenges for the decades to come. To meet increasing demand, water must now be reclaimed and purified. Water treatment generally involves the use of sludge or biomass as a pre-treatment followed by filtration, while desalination technology alternatively uses distillation and reverse osmosis filtration 1 . The development of membranes with superior selectivity and permeation rate is expected to reduce the energy footprint for reclaiming water and desalination, and would have a considerable societal and industrial impact. Traditional commercial porous membranes for molecular sieving are usually made of polymers or ceramic materials with specific pore sizes depending on the application. However, these membranes are still limited in terms of sieving performance and stability. Water filtration and desalination in reverse osmosis mainly rely on polyamide membranes based on thin-film composite designs, but the heterogeneity of the pores induces a trade-off between rejection efficiency and water flux 2 , 3 .
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Fig. 1: Transport mechanism through ultrathin membranes based on 2D materials.
Fig. 2: Synthesis and water transport in a CPF.
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Institut Européen des Membranes, IEM, UMR 5635, Université Montpellier, ENSCM, CNRS, Montpellier, France
Chrystelle Salameh?&?Damien Voiry
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Damien Voiry View author publications
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Salameh, C., Voiry, D. Sieving in order. Nat. Mater. (2022). https://doi.org/10.1038/s41563-022-01351-w
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Published : 23 September 2022
DOI : https://doi.org/10.1038/s41563-022-01351-w
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