Immobilization of U(VI) onto covalent organic frameworks with the different periodic structure by photocatalytic reduction

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 326, P. 122398 - 122398

Published: Jan. 11, 2023

Language: Английский

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Toward MOF@Polymer Core–Shell Particles: Design Principles and Potential Applications

Accounts of Chemical Research, Journal Year: 2023, Volume and Issue: 56(4), P. 462 - 474

Published: Feb. 6, 2023

ConspectusCompositing MOFs with polymers brings out the best properties of both worlds. The solubility and excellent mechanical endow brittle, powdery enhanced processability, thereby enriching their functions as solid sorbents, filters, membranes, catalysts, drug delivery vehicles, so forth. While most MOF–polymer composites are random mixtures two materials little control over fine structures, MOF@polymer core–shell particles have recently emerged a new platform for precise composite design. well-defined polymer coating can keep rich pore characteristics MOF intact while furnishing such improved dispersibility in various media, tunable surface energy, chemical stability, regulated guest diffusion. Nevertheless, structural complexity poses grand challenge to development generalizable feasible strategy constructing MOF@polymer. Examples literature that showcase presence shell on fully reserved porosity rare. Moreover, methods condensation (e.g., polyimide, polysulfone) severely underexplored, despite clear potential membrane materials. In this Account, we present our group's effort past 4 years synthesis applications composites. We first described highly polymerization method utilizes rapid physisorption copolymer (RCP) carry initiating groups surfaces. Subsequent controlled radical led formation uniform methacrylate or styrenic thickness composition. To utilize polymers, pioneered covalent grafting polyimide (PI) brushes UiO-66-NH2 addition, circumvent need anchoring group, further developed an based linkage. Instead connecting ligand, oligomer was linked functionalized linear physically entangled within MOF, thus realizing PI. Alternatively, PIs, polysulfone (PSF), polycarbonate (PC) also be grafted surfaces through metal–organic nanocapsule (MONC)-mediated using combination electrostatic interaction coordination bonds. find low-cost suitable commercialization, approach called non-solvent-induced surface-aimed deposition (NISAP) developed. action solvent phase separation drives dianhydrides polyamines surface, accelerated MOF. Finally, provided overview unique composites, including MMMs, porous liquids (PLs), immobilizing homogeneous catalysts. hope Account inspire more researchers develop optimize synthetic strategies uncover its full application potential.

Language: Английский

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COF and MOF Hybrids: Advanced Materials for Wastewater Treatment

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

Published: Oct. 12, 2023

Abstract Recent advances in ordered porous materials, including metal‐organic (MOF) and covalent organic frameworks (COF), are set to revolutionize the strategies used for wastewater treatment. This is attributed large surface area, high crystallinity, structural tunability, thermal chemical stability, well‐defined structures of MOF COF. Despite distinctive properties exhibited by single system (either or COF), combination COF MOF, as a hybrid construct, offers remarkable opportunity achieve superior functionality performance. The favorable features COF–MOF hybrids different treatment sectors have opened new venues effective environmental remediation. review presents state‐of‐the‐art design, synthesis, application hybrids. synthesis principles, MOF‐first, COF‐first, post‐synthetic linkage pre‐synthesized COFs MOFs summarized. potential these novel materials evaluated considering contaminant sensing, adsorptive removal, catalytic photodegradation.The conclusion drawn assessing existing hurdles opportunities development COF‐MOF an innovative yet viable approach addressing

Language: Английский

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Covalent–Organic Framework (COF)‐Core–Shell Composites: Classification, Synthesis, Properties, and Applications

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(45)

Published: Aug. 27, 2023

Abstract Core–shell structures, where the “guest” material is encapsulated within a protective shell, integrate advantages of different materials to enhance overall properties composite. Covalent–organic frameworks (COFs) are favorable candidates for composing core–shell structures due their inherent porosity, good activity, excellent stability, and other advantages. In particular, COFs as shells encapsulate functional becoming increasingly popular in fields environmental remediation energy conversion. However, there lack reviews on COF‐based materials. this context, review provides systematic summary current research composites. First, simple classification made The second part describes main synthesis methods. changes brought about by COF shell composites applications photocatalysis, electrocatalysis, adsorption, sensing, supercapacitors then emphasized. Finally, new perspectives future development challenges presented. purpose study provide insights into design application

Language: Английский

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Realizing Photocatalytic Overall Water Splitting by Modulating the Thickness‐Induced Reaction Energy Barrier of Fluorenone‐Based Covalent Organic Frameworks

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(39)

Published: July 24, 2023

Direct photocatalytic hydrogen and oxygen evolution from water splitting is an attractive approach for producing chemical fuels. In this work, a novel fluorenone-based covalent organic framework (COF-SCAU-2) successfully exfoliated into ultrathin three-layer nanosheets (UCOF-SCAU-2) overall (OWS) under visible light. The structures of UCOF-SCAU-2 greatly enhance carrier separation, utilization efficiency, the exposure active surface sites. Surprisingly, exhibits efficient OWS performance, with rates reaching 0.046 0.021 mmol h-1 g-1 , respectively, visible-light irradiation, whereas bulk COF-SCAU-2 shows no activity OWS. Charge-carrier kinetic analysis DFT calculations confirm that reducing thickness COF increases number accessible sites, reduces distance charge migration, prolongs lifetimes photogenerated carriers, decreases Gibbs free energy rate-limiting step compared to nonexfoliated COFs. This work offers new insights effect layer COFs on

Language: Английский

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A fluorescent dual-emissions UiO-66-NH2@TpTt-COF core-shell composite for sensitive and optosmart sensing of tetracycline

Applied Surface Science, Journal Year: 2023, Volume and Issue: 616, P. 156455 - 156455

Published: Jan. 18, 2023

Language: Английский

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Amino-functionalized Al-MOF modulated TpTt-COF with dual-emission for fluorescent and optosmart detecting tetracycline in food samples

Food Chemistry, Journal Year: 2023, Volume and Issue: 425, P. 136476 - 136476

Published: May 30, 2023

Language: Английский

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Metal–organic frameworks for organic transformations by photocatalysis and photothermal catalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(18), P. 9378 - 9418

Published: Jan. 1, 2024

Organic transformation by light-driven catalysis, especially, photocatalysis and photothermal denoted as photo(thermal) is an efficient, green, economical route to produce value-added compounds. In recent years, owing their diverse structure types, tunable pore sizes, abundant active sites, metal-organic framework (MOF)-based catalysis has attracted broad interest in organic transformations. this review, we provide a comprehensive systematic overview of MOF-based for First, the general mechanisms, unique advantages, strategies improve performance MOFs are discussed. Then, outstanding examples transformations over introduced according reaction type. addition, several representative advanced characterization techniques used revealing charge kinetics intermediates presented. Finally, prospects challenges field proposed. This review aims inspire rational design development materials with improved catalysis.

Language: Английский

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Organic Frameworks Memristor: An Emerging Candidate for Data Storage, Artificial Synapse, and Neuromorphic Device

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(16)

Published: Jan. 4, 2024

Abstract Memristors have recently become powerful competitors toward artificial synapses and neuromorphic computation, arising from their structural electrical similarity to biological neurons. From the diversity of materials, numerous organic inorganic materials proven exhibit great potential in application memristors. Herein, this work focuses on a class memristors based frameworks (OFs) pay attention most advanced experimental demonstrations. First, typical device structures memristive switching mechanisms are introduced. Second, latest progress OFs‐based is comprehensively summarized, including metal‐organic (MOFs), covalent (COFs), hydrogen‐bonded (HOFs), as well applications data storage, synapses, devices. Finally, future challenges prospects deeply discussed.

Language: Английский

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Polyarylimide-Based COF/MOF Nanoparticle Hybrids for CO₂ Conversion, Hydrogen Generation, and Organic Pollutant Degradation

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 10451 - 10465

Published: April 25, 2024

The continuous rise in atmospheric CO2 concentration, overconsumption of energy resources, and release extraordinary organic pollutants are challenging issues the modern era. Catalytic technology offers a promising solution to tackle these environmental challenges parallel by facilitating highly effective sustainable processes. Herein, we report fabrication series different nature polyarylimide (PAI)-based covalent–organic frameworks (COFs) via polycondensation reaction altering linkers, solvents, other experimental conditions. To optimize their catalytic performance, resultant PAI-COFs were further decorated with metal–organic (ZIF-67). decoration COF4 ZIF-67 led adjusted bandgaps, created an active site, enhanced charge separation migration photoexcited electron–hole (e–h) pairs, extended light absorption visible region, also facilitated transferring electrons between COFs MOFs photoelectron modulation approach. Based on our findings, it is confirmed that (MOFs) optimal catalysts compared (COF1, COF2, COF3) (ZIF-8). Interestingly, pristine COF4, 5ZIF-67/COF4 nanohybrid revealed ∼8-fold ∼5.3-fold for conversion, direct capturing, photoelectrochemical conversion faradaic efficiency 50%. Likewise, as-fabricated catalyst exhibits exceptional activities photocatalytic hydrogen production pollutant oxidation. Ultimately, this work will provide roadmap design COF-based nanohybrids applications.

Language: Английский

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