Rational Design of Covalent Organic Frameworks for Photocatalytic Hydrogen Peroxide Production

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Photocatalytic production of hydrogen peroxide (H 2 O ) represents a significant approach to achieving sustainable energy generation through solar energy, addressing both shortages and environmental pollution. Among various photocatalytic materials, covalent organic frameworks (COFs) have gained widespread attention in‐depth research due their unique advantages, including high porosity, predesignability, atomic‐level tunability. In recent years, progress has been made in the development, performance enhancement, mechanistic understanding COF‐based photocatalysts. This review focuses on latest advancements H using COFs, particularly emphasizing rational design COF structures regulate catalytic exploring fundamental processes involved photocatalysis. Based current achievements this field, paper also discusses existing challenges future opportunities, aiming provide reference for application COFs production.

Language: Английский

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Cd Single Atom as an Electron Mediator in an S‐Scheme Heterojunction for Artificial Photosynthesis of H₂O₂

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Developing conductor‐mediated S‐scheme heterojunction photocatalysts imitating natural photosynthetic systems emerges as a promising approach to hydrogen peroxide (H 2 O ) production. However, achieving precise coupling between two semiconductors with charge shuttle and modulating the interfacial interactions still remain significant bottleneck. Herein, we propose catalyst architecture Cd single atom mediated formed by interfacing CdS TiO nanoparticles. This exhibits an H production rate high 60.33 µmol g −1 min under UV–vis light irradiation, which is attributed efficient transport at interface of thanks S‐scheme. In‐situ X‐ray photoelectron spectroscopy (XPS) electron spin resonance (ESR) spin‐trapping tests confirm transfer route. Femtosecond transient absorption (fs‐TA) other ex‐situ characterizations further corroborate across interface. work offers new perspective on constructing atoms heterojunctions enhance photocatalytic performance.

Language: Английский

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Reticular Materials for Photocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Photocatalysis leverages solar energy to overcome the thermodynamic barrier, enabling efficient chemical reactions under mild conditions. It can greatly reduce reliance on traditional sources and has attracted significant research interest. Reticular materials, including metal‐organic frameworks (MOFs) covalent organic (COFs), represent a class of crystalline materials constructed from molecular building blocks linked by coordination bonds, respectively. function as heterogeneous catalysts, combining well‐defined structures high tailorability akin homogeneous catalysts. In this review, regulation light absorption, charge separation, surface in photocatalytic process through precise molecular‐level design based features reticular is elaborated. Notably, for MOFsmicroenvironment modulation around catalytic sites affects performance delved, with emphasis their unique dynamic flexible microenvironments. For COFs, inherent excitonic effects due fully nature discussed highlight strategies regulate charge‐ and/or energy‐transfer‐mediated photocatalysis. Finally, current challenges future directions field, aiming provide comprehensive understanding how be optimized enhanced photocatalysis discussed.

Language: Английский

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Proton Reservoir in Covalent Organic Framework Compensating Oxygen Reduction Reaction Enhances Hydrogen Peroxide Photosynthesis

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Abstract The water oxidation reaction (WOR) with sluggish kinetics usually fails to adequately furnish protons oxygen reduction (ORR), which ultimately constrains the overall efficiency of photocatalytic synthesis H 2 O , particularly in absence sacrificial agents. Herein, a class hydroxyl groups (─OH) functionalized covalent organic framework (COF) is reported as proton reservoir compensate ORR for greatly improving photosynthesis. It has been demonstrated that incorporation ─OH into TFBP‐DHBD (TFBP: 1,2,4,5‐tetrakis‐(4‐formylphenyl)benzene, DHBD: 3,3′‐dihydroxybenzidine) COF can achieve 3.3 times higher photosynthetic activity than TFBP‐BD (BD: benzidine) without groups. Isotope labeling experiments and situ infrared spectroscopy analysis demonstrate donate subsequently regain released from WOR. Theoretical calculations further confirm provides formation *OOH intermediate reduces its energy barrier, thereby facilitating photosynthesis . A novel loaded Al 3 spheres‐based streamlined microreactor built simultaneously production elimination bacteria over 1.3 × 10 4 CFU mL −1 superior continuous flow reactors.

Language: Английский

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Novel ZIF-8/ZnIn2S4 heterojunction efficiently generates hydrogen peroxide via dual-channel reactions driven by visible light in air

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160930 - 160930

Published: Feb. 1, 2025

Language: Английский

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Bringing Porous Framework Materials toward Photocatalytic H₂O₂ Production

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Photocatalytic H2O2 production driven by renewable solar energy is a promising and sustainable approach, with porous framework materials such as metal-organic frameworks (MOFs), covalent organic (COFs), hydrogen-bonded (HOFs) emerging highly efficient catalysts. This Review first presents the current research state of in photosynthesis, focusing on progress across different mechanism insights gained through advanced techniques. Furthermore, systematic categorization material modifications aimed at enhancing photocatalytic efficiency provided, linking structural to improved performance. Key factors charge carrier separation transfer, reaction pathways, stability are comprehensively analyzed. Finally, challenges related stability, scalability, cost-effectiveness, discussed alongside opportunities for future advancements. aims provide into understanding optimizing scalable photosynthesis.

Language: Английский

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Enhancing Donor–Acceptor Interaction and Framework Stability by the Povarov Reaction for Photocatalytic H₂O₂ Production

Chemistry of Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Language: Английский

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Platinum-induced nanolization and electron-deficient gold in platinum@gold cocatalyst for efficient photocatalytic hydrogen peroxide production

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 1249 - 1258

Published: Sept. 25, 2024

Language: Английский

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Bi₃TiNbO₉/Bi₂S₃ Heterojunction for Efficient Photosynthesis of H₂O₂ in Pure Water

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Heterojunction engineering has been deemed one of the most promising strategies for promoting charge separation and improving solar‐to‐chemicals efficiency. Howbeit, constructing well‐defined nanoheterojunction with superior photocatalytic activity H 2 O generation a clear reaction mechanism remains formidable challenge. Herein, an in situ vulcanization way to synthesize intriguing 2D/1D Bi 3 TiNbO 9 /Bi S heterojunction by growing nanorods on microsheet is used first time, where S‐scheme transfer formed that facilitates spatial carriers. Moreover, grown can optimize interfacial electronic structure energy barriers. As result, yield rate reach 810(2) µmol g −1 h without any sacrificial agents cocatalysts, ≈6.18 ≈18.0 times pristine , respectively. Importantly, unveiled unprecedented stability, remaining ≈95.46(2)% initial after 13 continuous cycles. This work highlights innovative strategy engineer oxide perovskite/metal sulfide nanocomposite catalysts artificial photosynthesis opening new opportunities achieving highly efficient photocatalyst systems.

Language: Английский

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Hybrid materials based on covalent organic frameworks for photocatalysis

InfoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Abstract Covalent organic frameworks (COFs) feature π‐conjugated structure, high porosity, structural regularity, large specific surface area, and good stability, being considered as ideal platform for photocatalytic application. Although single COFs have achieved significant progress in photocatalysis benefiting from their distinctive properties, the COFs‐based hybrids provide an extraordinary opportunity to achieve superior performance. From perspective of carrier transfer mechanism, a systematic summary based on other functional materials (metal atoms, metal clusters/nanoparticles, inorganic semiconductors, metal–organic frameworks, polymers) can offer valuable guidance design hybrids. In this review, mechanism hybrid (such Schottky junction, type II heterojunction, Z‐scheme S‐scheme heterojunction) is briefly introduced. Subsequently, performance water splitting, CO 2 reduction, pollutant degradation are comprehensively reviewed. Specifically, separation different types highlighted. Finally, challenges prospects envisaged. The insights presented review expected be helpful rational obtain outstanding activity. image

Language: Английский

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