Water Research, Journal Year: 2023, Volume and Issue: 243, P. 120325 - 120325
Published: July 11, 2023
Language: Английский
Nature Water, Journal Year: 2023, Volume and Issue: 1(1), P. 37 - 46
Published: Jan. 19, 2023
Language: Английский
Citations
121
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Aug. 15, 2023
Membranes with high ion permeability and selectivity are of considerable interest for sustainable water treatment, resource extraction energy storage. Herein, inspired by K+ channel streptomyces A (KcsA K+), we have constructed cation sieving membranes using MXene nanosheets Ethylenediaminetetraacetic acid (EDTA) molecules as building blocks. Numerous negatively charged oxygen atoms EDTA 6.0 Å two-dimensional (2D) sub-nanochannel enable biomimetic size, chemical groups tunable charge density the resulting membranes. The show capability to recognize monovalent/divalent cations, achieving excellent K+/Mg2+ 121.2 mixed salt solution feed, which outperforms other reported under similar testing conditions transcends current upper limit. Characterization simulations indicate that recognition effect partial dehydration effects play critical roles in cations selective increasing local within significantly improves selectivity. Our findings provide a theoretical basis ions transport sub-nanochannels an alternative strategy design separation
Language: Английский
Citations
91
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Nov. 22, 2023
Highly permeable polyamide (PA) membrane capable of precise ionic sieving can be utilized for many energy-efficient chemical separations. To fulfill this target, it is crucial to innovate membrane-forming process induce a narrow pore-size distribution. Herein, we report an anhydrous interfacial polymerization (AIP) at solid-liquid interface where the amine layer sublimated in direct contact with alkane containing acyl chlorides. In such heterophase interface, water-caused side reactions are eliminated, and amines compact arrangement enable intensive orderly IP reaction, leading unique PA accuracy 0.5 Å. The AIP-PA demonstrates excellent separation selectivities monovalent divalent cations as Mg2+/Li+ (78.3) anions Cl-/SO42- (29.2) together high water flux up 13.6 L m-2 h-1 bar-1. Our AIP strategy may provide inspirations engineering high-precision membranes available various advanced
Language: Английский
Citations
65
Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(8)
Published: Feb. 13, 2024
Understanding the molecular-level mechanisms involved in transmembrane ion selectivity is essential for optimizing membrane separation performance. In this study, we reveal our observations regarding behavior of Li + and Mg 2+ ions as a response to changing pore solvation abilities covalent-organic-framework (COF) membranes. These were manipulated by adjusting lengths oligoether segments attached channels. Through comparative experiments, able unravel relationships between ability various transport properties, such partitioning, conduction, selectivity. We also emphasize significance competition with solvating modulating found that increasing length chain facilitated transport; however, it was COF chains containing two ethylene oxide units exhibited most pronounced discrepancy energy barrier , resulting highest factor among all evaluated Remarkably, under electro-driven binary-salt conditions, specific achieved an exceptional /Mg up 1352, making one effective membranes available separation. The insights gained from study significantly contribute advancing understanding selective within confined nanospaces provide valuable design principles developing highly
Language: Английский
Citations
37
ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21633 - 21650
Published: Aug. 8, 2024
Synthetic membranes featuring confined nanostructures have emerged as a prominent category of leading materials that can selectively separate target ions from complex water matrices. Further advancements in these will pressingly rely on the ability to elucidate inherent connection between transmembrane ion permeation behaviors and ion-selective nanostructures. In this review, we first abstract state-of-the-art with diversity spatial confinements current synthetic membranes. Next, underlying mechanisms govern under nanoconfinement are analyzed. We then proceed assess membrane focus their structural merits allow ultrahigh selectivity for wide range monovalent divalent ions. also highlight recent experimental methodologies measuring ionic permeability, hydration numbers, energy barriers transport. conclude by putting forth future research prospects challenges realm high-performance
Language: Английский
Citations
23
npj Clean Water, Journal Year: 2024, Volume and Issue: 7(1)
Published: March 30, 2024
Abstract Considering growing efforts to understand and improve the solute-specific selectivity of nanofiltration (NF) membranes, we explored ion-specific effects that govern charge performance a loose polyamide NF membrane is commonly used for solute-solute separations. Specifically, systematically evaluated zeta potential under different conditions pH, salinity, ionic composition, correlated obtained data with tested similar conditions. Our results identify p K both carboxylic amine groups bonded surface suggest highly polarizable chloride anions in solution adsorb polyamide, increasing its negative charge. We also show monovalent cations “stickiness” can neutralize extents due their varying tendency sorb polymer matrix or screen fixed carboxyl on surface. Notably, our correlation between measurements permeability experiments indicates substantial contribution ions Donnan exclusion membranes.
Language: Английский
Citations
19
Nature Water, Journal Year: 2024, Volume and Issue: 2(8), P. 706 - 718
Published: Aug. 8, 2024
Language: Английский
Citations
18
Frontiers of Environmental Science & Engineering, Journal Year: 2022, Volume and Issue: 17(2)
Published: Oct. 31, 2022
Abstract Ion-exchange membranes (IEMs) are utilized in numerous established, emergent, and emerging applications for water, energy, the environment. This article reviews five different types of IEM selectivity, namely charge, valence, specific ion, ion/solvent, ion/uncharged solute selectivities. Technological pathways to advance selectivities through sorption migration mechanisms transport critically analyzed. Because underlying principles governing transport, efforts enhance selectivity by tuning membrane structural chemical properties almost always accompanied a concomitant decline permeability desired ion. Suppressing undesired crossover solvent neutral species is crucial realize practical implementation several technologies, including bioelectrochemical systems, hypersaline electrodialysis desalination, fuel cells, redox flow batteries, but ion/solvent relatively understudied, compared ion/ion Deepening fundamental understanding phenomena, specifically factors underpinning structure-property-performance relationships, will be vital guide informed development more selective IEMs. Innovations material design offer opportunities utilize ion discrimination that radically from conventional IEMs potentially depart putative permeability-selectivity tradeoff. Advancements can contribute meeting aqueous separation needs environmental challenges.
Language: Английский
Citations
60
Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)
Published: Dec. 22, 2022
Abstract Biological cell membranes can efficiently switch Na + /K selectivity in response to external stimuli, but achieving analogous functions a single artificial membrane is challenging. Here, we report highly crystalline covalent organic framework (COF) with well-defined nanochannels and coordinative sites (i. e., amino acid) that act as ion-selective switches manipulate K transport. The ion of the COF dynamic be switched between -selective by applying pH stimulus. experimental results combined molecular dynamics simulations reveal switchable originates from differentiated coordination interactions ions acids. Benefiting selectivity, further demonstrate potential varying electrolyte pH, miming polarity reversal during neural signal transduction vivo, suggesting great these for vitro biomimetic applications.
Language: Английский
Citations
57
Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(6), P. 3313 - 3323
Published: March 2, 2022
Despite decades of dominance in separation technology, progress the design and development high-performance polymer-based membranes has been incremental. Recent advances materials science chemical synthesis provide opportunities for molecular-level next-generation membrane materials. Such designs necessitate a fundamental understanding transport mechanisms at molecular scale. Molecular simulations are important tools that could lead to structure-property-performance relationships advancing design. In this Perspective, we assess application capability understand ion water across polymeric membranes. Additionally, discuss reliability models mimicking structure chemistry nanochannels pathways We conclude by providing research directions resolving key knowledge gaps related phenomena construction
Language: Английский
Citations
50