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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pH-stable MOFs: Design principles and applications

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 493, P. 215301 - 215301

Published: June 18, 2023

Language: Английский

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New‐Generation Anion‐Pillared Metal–Organic Frameworks with Customized Cages for Highly Efficient CO₂ Capture

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(14)

Published: Jan. 18, 2023

Abstract The rational design of porous materials for CO 2 capture under realistic process conditions is highly desirable. However, trade‐offs exist among a nanopore's capacity, selectivity, adsorption heat, and stability. In this study, new generation anion‐pillared metal‐organic frameworks (MOFs) are reported with customizable cages benchmark from flue gas. optimally designed TIFSIX‐Cu‐TPA exhibits high excellent /N thermal stability, chemical stability in acid solution acidic atmosphere, as well modest heat facile regeneration. Additionally, the practical separation performance synthesized MOFs demonstrated by breakthrough experiments various conditions. A selective achieved at 298–348 K impressive capacity 2.1–1.4 mmol g −1 . Importantly, outstanding sustained humidity over ten repeat cycles. molecular mechanism MOF's further investigated situ dosed single crystal structure theoretical calculations, highlighting two separate binding sites small large featured selectivity loading, respectively. simultaneous inside these types interconnected accounts newly anionic pillar‐caged MOFs.

Language: Английский

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Kilogram-Scale Fabrication of a Robust Olefin-Linked Covalent Organic Framework for Separating Ethylene from a Ternary C₂ Hydrocarbon Mixture

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(39), P. 21483 - 21490

Published: Sept. 22, 2023

One-step adsorptive purification of ethylene (C2H4) from a ternary mixture acetylene (C2H2), C2H4, and ethane (C2H6) by single material is great importance but challenging in the petrochemical industry. Herein, chemically robust olefin-linked covalent organic framework (COF), NKCOF-62, designed synthesized melt polymerization method employing tetramethylpyrazine terephthalaldehyde as cheap monomers. This avoids most disadvantages classical solvothermal methods, which enable cost-effective kilogram fabrication COFs one pot. Furthermore, NKCOF-62 shows remarkably selective adsorption C2H2 C2H6 over C2H4 thanks to its unique pore environments suitable size. Breakthrough experiments demonstrate that polymer-grade can be directly obtained C2H2/C2H6/C2H4 (1/1/1) mixtures through separation process. Notably, first demonstration potential use for separation, provides blueprint design construction industrial gas separations.

Language: Английский

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Recent progress on ZIF-8 based MOF derivatives for electrocatalysis

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 499, P. 215492 - 215492

Published: Oct. 27, 2023

Language: Английский

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Heteroatom‐Doped Ag₂₅ Nanoclusters Encapsulated in Metal–Organic Frameworks for Photocatalytic Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)

Published: Feb. 26, 2024

Atomically precise metal nanoclusters (NCs) with unique optical properties and abundant catalytic sites are promising in photocatalysis. However, their light-induced instability the difficulty of utilizing photogenerated carriers for photocatalysis pose significant challenges. Here, MAg

Language: Английский

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Near‐ and Long‐Range Electronic Modulation of Single Metal Sites to Boost CO₂ Electrocatalytic Reduction

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(19)

Published: Feb. 27, 2023

Tuning the electronic structure of active center is effective to improve intrinsic activity single-atom catalysts but realization precise regulation remains challenging. Herein, a strategy "synergistically near- and long-range regulation" reported effectively modulate sites. ZnN4 sites decorated with axial sulfur ligand in first coordination surrounded phosphorus atoms carbon matrix are successfully constructed hollow supports (ZnN4 S1 /P-HC). /P-HC exhibits excellent performance for CO2 reduction reaction (CO2 RR) Faraday efficiency CO close 100%. The coupling RR thermodynamically favorable hydrazine oxidation replace oxygen evolution two-electrode electrolyzer can greatly lower cell voltage by 0.92 V at current density 5 mA cm-2 , theoretically saving 46% energy consumption. Theoretical calculation reveals that near-range thiophene-S neighboring P synergistically lead increase electron localization around Zn sites, which strengthens adsorption *COOH intermediate therefore boosts RR.

Language: Английский

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Non-CO₂ greenhouse gas separation using advanced porous materials

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(4), P. 2056 - 2098

Published: Jan. 1, 2024

Non-CO 2 greenhouse gas mitigation and recovery with advanced porous materials (MOFs, COFs, HOFs, POPs, etc. ) would significantly contribute to achieving carbon neutrality gain economic benefits concurrently.

Language: Английский

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Flexible–robust MOFs/HOFs for challenging gas separations

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 505, P. 215660 - 215660

Published: Jan. 30, 2024

Language: Английский

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Fluorescence Enhancement of a Metal‐Organic Framework for Ultra‐Efficient Detection of Trace Benzene Vapor

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(24)

Published: April 18, 2023

Indoor detection of volatile organic compounds (VOCs) concentration is necessary due to the serious toxicity hazards even at trace level. However, physisorbents usually exhibit weak interactions especially in presence concentrations VOCs, thus exhibiting poor responsive signal. Herein, we report a new flexible metal-organic framework (MOF) that exhibits interesting pore-opening behavior after immersing H2 O. The phase shows significant (≈116 folds) and extremely fast (<1 minute) fluorescence enhancement being exposed saturated benzene vapor. limit for vapor can be calculated as 0.133 mg L-1 . Thus this material represents first MOF achieve visual by naked eyes. Theoretical calculations single-crystal structure reveal special "bilateral π-π stacking" between host guest, which facilitate electron transfer greatly enhance intensity fluorescence.

Language: Английский

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