Defect Engineering of MOF‐Based Membrane for Gas Separation

Advanced Functional Materials, Год журнала: 2023, Номер 33(38)

Опубликована: Май 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.

Язык: Английский

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pH-stable MOFs: Design principles and applications

Coordination Chemistry Reviews, Год журнала: 2023, Номер 493, С. 215301 - 215301

Опубликована: Июнь 18, 2023

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 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.

Язык: 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, Год журнала: 2023, Номер 145(39), С. 21483 - 21490

Опубликована: Сен. 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.

Язык: Английский

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Recent progress on ZIF-8 based MOF derivatives for electrocatalysis

Coordination Chemistry Reviews, Год журнала: 2023, Номер 499, С. 215492 - 215492

Опубликована: Окт. 27, 2023

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(17)

Опубликована: Фев. 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

Язык: Английский

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

Advanced Materials, Год журнала: 2023, Номер 35(19)

Опубликована: Фев. 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.

Язык: Английский

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Non-CO₂ greenhouse gas separation using advanced porous materials

Chemical Society Reviews, Год журнала: 2024, Номер 53(4), С. 2056 - 2098

Опубликована: Янв. 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.

Язык: Английский

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Flexible–robust MOFs/HOFs for challenging gas separations

Coordination Chemistry Reviews, Год журнала: 2024, Номер 505, С. 215660 - 215660

Опубликована: Янв. 30, 2024

Язык: Английский

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Tetranuclear Cu^IICluster as the Ten Node Building Unit for the Construction of a Metal–Organic Framework for Efficient C₂H₂/CO₂Separation

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(13)

Опубликована: Фев. 2, 2023

Abstract Rational design of high nuclear copper cluster‐based metal–organic frameworks has not been established yet. Herein, we report a novel MOF ( FJU‐112 ) with the ten‐connected tetranuclear cluster [Cu 4 (PO 3 2 μ ‐H O) (CO ] as node which was capped by deprotonated organic ligand H L (3,5‐Dicarboxyphenylphosphonic acid). With BPE (1,2‐Bis(4‐pyridyl)ethane) pore partitioner, spaces in structure were divided into several smaller cages and windows for efficient gas adsorption separation. exhibits separation performance C /CO separation, temperature‐dependent sorption isotherms further confirmed lab‐scale dynamic breakthrough experiments. The grand canonical Monte Carlo simulations (GCMC) studies show that its is contributed to strong π‐complexation interactions between molecules framework surfaces, leading more uptakes over CO molecules.

Язык: Английский

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