Nanovehicle-assisted monomer shuttling enables highly permeable and selective nanofiltration membranes for water purification

Nature Water, Journal Year: 2023, Volume and Issue: 1(3), P. 281 - 290

Published: Feb. 27, 2023

Language: Английский

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Charged Nanochannels in Covalent Organic Framework Membranes Enabling Efficient Ion Exclusion

ACS Nano, Journal Year: 2022, Volume and Issue: 16(8), P. 11781 - 11791

Published: June 30, 2022

Controllable ion transport through nanochannels is crucial for biological and artificial membrane systems. Covalent organic frameworks (COFs) with regular tunable are emerging as an ideal material platform to develop synthetic membranes transport. However, exclusion by COF remains challenging because most materials have large-sized leading nonselective of small ions. Here we ionic (iCOFMs) control charged framework nanochannels, the interior surfaces which covered arrayed sulfonate groups render superior charge density. The overlap electrical double layer in blocks entry co-ions, narrows their passageways, concomitantly restrains permeation counterions via balance. These highly within iCOFM enable while maintaining intrinsically high water permeability. Our results reveal possibilities controllable based on purification, separation, sensing, energy conversion.

Language: Английский

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Microstructure optimization of bioderived polyester nanofilms for antibiotic desalination via nanofiltration

Science Advances, Journal Year: 2023, Volume and Issue: 9(18)

Published: May 5, 2023

The successful implementation of thin-film composite membranes (TFCM) for challenging solute-solute separations in the pharmaceutical industry requires a fine control over microstructure (size, distribution, and connectivity free-volume elements) thickness selective layer. For example, desalinating antibiotic streams highly interconnected elements right size to block antibiotics but allow passage salt ions water. Here, we introduce stevioside, plant-derived contorted glycoside, as promising aqueous phase monomer optimizing TFCM made via interfacial polymerization. low diffusion rate moderate reactivity together with its nonplanar distorted conformation, produced thin layers an ideal microporosity desalination. optimized 18-nm membrane exhibited unprecedented combination high water permeance (81.2 liter m-2 hour-1 bar-1), desalination efficiency (NaCl/tetracycline separation factor 11.4), antifouling performance, chlorine resistance.

Language: Английский

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Tweak in Puzzle: Tailoring Membrane Chemistry and Structure toward Targeted Removal of Organic Micropollutants for Water Reuse

Environmental Science & Technology Letters, Journal Year: 2022, Volume and Issue: 9(4), P. 247 - 257

Published: March 25, 2022

Membrane-based water reuse through reverse osmosis (RO) and nanofiltration (NF) faces a critical challenge from organic micropollutants (OMPs). Conventional polyamide RO NF membranes often lack adequate selectivity to achieve sufficient removal of toxic harmful OMPs in water. Tailoring membrane chemistry structure allow highly selective has risen as an important topic membrane-based reuse. However, literature gap remains be addressed: how design for more OMPs. In this review, we critically analyzed the roles on highlighted opportunities strategies toward context Specifically, statistically rejection by conventional illustrate their drawbacks removal, followed discussion underlying fundamental mechanisms. Corresponding tailor properties improving against OMPs, including surface modification, nanoarchitecture construction, deployment alternative materials, were systematically assessed terms permeance, rejection, water–OMPs selectivity. end, discussed potential challenges various scale-up real applications.

Language: Английский

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Emerging environmentally friendly bio-based nanocomposites for the efficient removal of dyes and micropollutants from wastewater by adsorption: a comprehensive review

RSC Advances, Journal Year: 2024, Volume and Issue: 14(4), P. 2804 - 2834

Published: Jan. 1, 2024

Water scarcity will worsen due to population growth, urbanization, and climate change.

Language: Английский

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Anhydrous interfacial polymerization of sub-1 Å sieving polyamide membrane

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

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When self-assembly meets interfacial polymerization

Science Advances, Journal Year: 2023, Volume and Issue: 9(18)

Published: May 3, 2023

Interfacial polymerization (IP) and self-assembly are two thermodynamically different processes involving an interface in their systems. When the systems incorporated, will exhibit extraordinary characteristics generate structural morphological transformation. In this work, ultrapermeable polyamide (PA) reverse osmosis (RO) membrane with crumpled surface morphology enlarged free volume was fabricated via IP reaction introduction of self-assembled surfactant micellar system. The mechanisms formation nanostructures were elucidated multiscale simulations. electrostatic interactions among

Language: Английский

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A novel flower-like nickel-metal-organic framework (Ni-MOF) membrane for efficient multi-component pollutants removal by gravity

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 470, P. 144311 - 144311

Published: June 25, 2023

Language: Английский

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Double charge flips of polyamide membrane by ionic liquid-decoupled bulk and interfacial diffusion for on-demand nanofiltration

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 13, 2024

Fine design of surface charge properties polyamide membranes is crucial for selective ionic and molecular sieving. Traditional face limitations due to their inherent negative limited modification range. Herein, we report a facile liquid-decoupled bulk/interfacial diffusion strategy elaborate the double flips membranes, enabling on-demand transformation from inherently highly positive near-neutral charges. The key these lies in meticulous utilization liquid that decouples intertwined diffusion, enhancing interfacial while inhibiting bulk diffusion. These charge-tunable can be customized impressive separation performance, example, profound Cl

Language: Английский

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Metal–Organic Frameworks for Water Desalination

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(43)

Published: Aug. 8, 2023

Abstract Rapid industrialization and ever‐increasing global population culminate in continuous upsurge freshwater crisis worldwide. The most reliable promising solution to this is utilizing sea‐water as the source, desalination technologies pave way for efficient production of from sea‐water. In regard, membrane‐based method comes forth owing its' separation, operational ease, low‐energy consumption. Metal–organic frameworks (MOFs), explored crystalline porous materials, show tremendous promise membrane‐materials their structural diversity, tunability, voids which provide secondary water channels. Given significant advances are made MOF‐materials past few years, it crucial systematically summarize recent progress development field. review, a brief overview various saline systems prerequisites first presented. Then, advanced fabrication strategies MOF‐membranes followed by processes such reverse osmosis forward summarized. Finally, authors’ perspectives on unsolved scientific technical challenges opportunities MOF‐integrated membranes toward real‐world implementation proposed. With further systematic development, an ideal platform next‐generation technology.

Language: Английский

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