Defect Engineering of MOF‐Based Membrane for Gas Separation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(38)

Published: May 26, 2023

Abstract Metal–organic frameworks (MOFs) are highly versatile materials that have been identified as promising candidates for membrane‐based gas separation applications due to their uniformly narrow pore windows and virtually unlimited structural chemical features. Defect engineering of MOFs has opened new opportunities manipulating MOF structures, providing a simple yet efficient approach enhancing membrane separation. However, the utilization this strategy tailor microstructures enhance performance is still in its infancy. Thus, summary aims provide guideline tailoring defective MOF‐based membranes. Recent developments defect membranes will be discussed, including synthesis strategies MOFs, effects defects on adsorption properties, transport mechanisms, recently reported Furthermore, emerging challenges future prospects outlined. Overall, offers an exciting opportunity improve there long way go fully understand influence properties optimize design specific applications. Nonetheless, continued research field holds great promise development next‐generation technologies.

Language: Английский

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Improved Capacitive Energy Storage Nanocomposites at High Temperature Utilizing Ultralow Loading of Bimetallic MOF

Small, Journal Year: 2023, Volume and Issue: 19(26)

Published: March 16, 2023

It is urgent to develop high-temperature dielectrics with high energy density and efficiency for next-generation capacitor demands. Metal-organic frameworks (MOFs) have been widely used due their structural diversity functionally adaptable properties. Doping of metal nodes in MOFs an effective strategy change the band gap edge positions original MOFs, which helps improve ability bind charges as traps. In this work, incorporation ultralow loading (<1.5 wt%) novel bimetallic (ZIF 8-67) into polyetherimide (PEI) polymer matrix exhibited. With addition ZIF 8-67, breakdown strength storage capacity 8-67/PEI nanocomposites are significantly improved, especially at temperatures (200 °C). For example, densitiy 0.5 wt% nanocomposite up 2.96 J cm-3 , (η) > 90% 150 °C. At 200 °C, discharge 0.25 can still reach 1.84 a η 90%, nine times higher than that pure PEI (0.21 ) under same conditions, it largest improvement compared previous reports.

Language: Английский

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Large‐Area Fabrication of Ultrathin Metal‐Organic Framework Membranes

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(18)

Published: Feb. 28, 2023

Metal-organic framework (MOF)-based membranes, featuring potential molecular sieving effects and therefore capable of surmounting the ubiquitous trade-off between membrane selectivity permeability, hold great promise for multitudinous chemical separations. Nevertheless, it remains highly challenging large-area fabrication ultrathin MOF membranes with variable thickness, homogeneity, preferential orientation. Herein, this work reports facile (down to 20 nm) NUS-8 in (>200 cm2 ) yet homogeneity texture along (00l) direction due superior solution processability as-synthesized nanosheets. The resultant good adhesion properties certain flexibility exhibit excellent rejections (>98% Mg2+ Al3+ , dyes weights larger than 585.5 g mol-1 toward aqueous separation various metal ions at modest permeance (1-3.2 L m-2 h-1 bar-1 well-aligned structures. Such performance outstands among polymetric thin-film composite mixed matrix other reported literature. mechanism is reasonably discussed based on experimental theoretical results. This study opens up novel perspectives preparing using MOFs.

Language: Английский

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Water-stable metal–organic frameworks (MOFs): rational construction and carbon dioxide capture

Chemical Science, Journal Year: 2024, Volume and Issue: 15(5), P. 1570 - 1610

Published: Jan. 1, 2024

This review highlights the design and synthesis of water-stable MOFs, as well their applications in carbon capture.

Language: Английский

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Growing ZIF‐8 Seeds on Charged COF Substrates toward Efficient Propylene‐Propane Separation Membranes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(22)

Published: March 27, 2023

We report a covalent organic framework (COF) induced seeding strategy to fabricate metal-organic (MOF) membranes. Contrary graphene oxide nuclei-depositing substrate, COF substrate has uniform pore size, high microporosity and abundant functional groups. designed series of charged nanosheets induce the formation ZIF-8@COF nanosheet seeds with aspect ratio over 150, which were readily processed into compact seed layer. The resulting ZIF-8 membranes thickness down 100 nm exhibit an ultrahigh C3 H6 /C3 H8 separation performance superior long-term stability. Our is also validated by fabricating ultrathin ZIF-67 UiO-66

Language: Английский

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Recent Progress in 2D Metal‐Organic Framework‐Related Materials

Small, Journal Year: 2023, Volume and Issue: 20(1)

Published: Aug. 29, 2023

Abstract 2D metal‐organic frameworks‐based (2D MOF‐related) materials benefit from variable topological structures, plentiful open active sites, and high specific surface areas, demonstrating promising applications in gas storage, adsorption separation, energy conversion, other domains. In recent years, researchers have innovatively designed multiple strategies to avoid the adverse effects of conventional methods on synthesis high‐quality MOFs. This review focuses latest advances creative techniques for MOF‐related both top‐down bottom‐up perspectives. Subsequently, are categorized summarized synthesizing composites their derivatives. Finally, current challenges highlighted faced by some targeted recommendations put forward inspire investigate more effective methods.

Language: Английский

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Optimized Sieving Effect for Ethanol/Water Separation by Ultramicroporous MOFs

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(10)

Published: Jan. 4, 2023

High-purity ethanol is a promising renewable energy resource, however separating from trace amount of water extremely challenging. Herein, two ultramicroporous MOFs (UTSA-280 and Co-squarate) were used as adsorbents. A prominent adsorption negligible identify perfect sieving effect on both MOFs. Co-squarate exhibits surprising capacity at low pressure that surpassing the reported Single crystal X-ray diffraction theoretical calculations reveal such performance derives optimized through pore structure adjustment. with larger rhombohedral channel suitable for zigzag location, resulting in reinforced guest-guest guest-framework interactions. Ultrapure (99.9 %) can be obtained directly by ethanol/water mixed vapor breaking columns packed Co-squarate, contributing to potential fuel-grade purification.

Language: Английский

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Structure Regulation of MOF Nanosheet Membrane for Accurate H₂/CO₂ Separation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(17)

Published: March 1, 2023

High-purity H2 production accompanied with a precise decarbonization opens an avenue to approach carbon-neutral society. Metal-organic framework nanosheet membranes provide great opportunities for accurate and fast /CO2 separation, CO2 leakage through the membrane interlayer galleries decided ultimate separation accuracy. Here we introduce low dose amino side groups into Zn2 (benzimidazolate)4 conformation. Physisorbed served as linkers, gently regulated stabilized spacing. These evoked synergistic effect of adsorption-assisted molecular sieving steric hinderance, whilst exquisitely preserving apertures high-speed transport. The optimized set new record ultrathin in (mixture factor: 1158, permeance: 1417 gas permeation unit). This strategy provides effective way customize desirable ability.

Language: Английский

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Recent progress on general wearable electrical heating textiles enabled by functional fibers

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109497 - 109497

Published: March 16, 2024

Language: Английский

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Dynamic Phase Transformations of Prussian Blue Analogue Crystals in Hydrotherms

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16659 - 16669

Published: June 7, 2024

Prussian blue analogue (PBA)/metal–organic frameworks (MOFs) are multifunctional precursors for the synthesis of metal/metal compounds, carbon, and their derived composites (P/MDCs) in chemical, medical, energy, other applications. P/MDCs combine advantages both high specific surface area PBA/MOF electronic conductivity metal compound/carbon. Although calcination under different atmospheres has been extensively studied, transformation mechanism hydrothermal conditions remains unclear. The qualitative preparation a challenge. Here, we select PBA to construct machine-learning model measure its phase diagram. architecture–activity relationship substances among nine parameters was analyzed PBA. Excitingly, established universal accurately fabricate 31 derivates. Additionally, performed three-dimensional reconstructed transmission electron microscopy, X-ray absorption fine structure spectroscopy, ultraviolet photoelectron situ powder diffraction, theoretical calculation analyze derivatives oxygen evolution reaction clarify mechanisms. We uncover unified principles PBA, expect guide design wide range composites.

Language: Английский

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