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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Boosting the Quantum Efficiency of Ionic Carbon Nitrides in Photocatalytic H₂O₂ Evolution via Controllable n → π* Electronic Transition Activation

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

Published: Oct. 17, 2024

Abstract Hydrogen peroxide (H 2 O ) is a crucial chemical used in numerous industrial applications, yet its manufacturing relies on the energy‐demanding anthraquinone process. Solar‐driven synthesis of H gaining traction as promising research area, providing sustainable method for production. Herein, controllable activation n → π* electronic transition presented to boost photocatalytic evolution ionic carbon nitrides. This enhancement achieved through simultaneous introduction structural distortions and defect sites (─C ≡ N groups vacancies) into KPHI framework. The optimal catalyst ( 2%Ox‐ KPHI) reached an apparent quantum yield 41% at 410 nm without need any cocatalysts, outperforming most previously reported nitride‐based photocatalysts. Extensive experimental characterizations theoretical calculations confirm that corrugated configuration presence defects significantly broaden light absorption profile, improve carrier separation migration, promote adsorption, lower energy barriers desorption. Transient spectroscopy indicates enhanced performance 2%Ox ‐KPHI largely attributed preferential migration electrons over extended timescales, following diffusion geminate carriers across PHI sheets.

Language: Английский

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Enhanced exciton dissociation through scandium-decorated conjugated polymers for artificial photosynthesis of hydrogen peroxide

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Efficient photocatalytic H2 evolution over tubular mesoporous carbon nitride with N-vacancy by microwave-assisted synthesis

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

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Engineering Polyheptazine and Polytriazine Imides for Photocatalysis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(49)

Published: Aug. 27, 2024

Abstract As organic semiconductor materials gain increasing prominence in the realm of photocatalysis, two carbon‐nitrogen materials, poly (heptazine imide) (PHI) and (triazine (PTI), have garnered extensive attention applications owing to their unique structure properties. This review elaborates on distinctive physical chemical features PHI PTI, emphasizing formation mechanisms ensuing Furthermore, it elucidates intricate correlation between energy band structures various photocatalytic reactions. Additionally, outlines primary synthetic strategies for constructing along with characterization techniques identification. It also summarizes enhancing performance whose advantages are discussed. Finally, highlights promising prospects challenges PTI as photocatalysts.

Language: Английский

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Harnessing S-scheme junctions for enhanced CO2 photoreduction: molecular bonding of copper(II) complexes onto K-doped polymeric carbon nitride via microwave heating

Rare Metals, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 20, 2024

Language: Английский

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Photocatalytic overall water splitting endowed by modulation of internal and external energy fields

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The pursuit of sustainable and clean energy sources has driven extensive research into the generation use novel vectors. photocatalytic overall water splitting (POWS) reaction been identified as a promising approach for harnessing solar to produce hydrogen be used carrier. Materials chemistry associated photocatalyst design are key further improvement efficiency POWS through optimization charge carrier separation, migration interfacial kinetics. This review examines latest progress in POWS, ranging from catalyst materials modification strategies design. Critical analysis focuses on separation promotion perspective internal external fields, aiming trace driving force behind process explore potential industrial development this technology. concludes by presenting perspectives emerging opportunities technology, challenges overcome future studies.

Language: Английский

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In-situ construction of tubular core–shell noble-metal-free CMT@TiO2/ZnIn2S4 S-scheme heterojunction for superior photothermal-photocatalytic hydrogen evolution

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 18, 2025

Language: Английский

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Amidoxime‐Functionalized sp²‐Carbon‐Conjugated Covalent Organic Frameworks for Overall Photocatalytic Hydrogen Peroxide Production

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

Published: Feb. 18, 2025

Abstract Cyano‐functionalized sp 2 ‐carbon‐conjugated covalent organic frameworks (CN‐COFs) have been considered as promising candidates for artificial photosynthesis of hydrogen peroxide (H O ). Nevertheless, the performance CN‐COFs is inherently limited by constrained oxygen capture capacity, insufficient charge separation, and rapid carrier recombination. Herein, study rationally reports a strategy integrating amidoxime groups (AO) into COF through one‐step cyano hydrolysis process to increase photocatalytic H production. Combined simulations characterizations reveal that introducing AO enhances hydrophilicity, stabilizes adsorbed Oxygen (O ) via bonding, accelerates separation transfer, well lowers energy barrier reduction reaction pathway, thus achieving an unmatched production rate 6024 µmol h −1 g . Importantly, solar‐to‐chemical conversion (SCC) efficiency PTTN‐AO reaches 0.61%, significantly surpassing natural plants (≈0.1%) most COF‐based photocatalysts. The current findings are encouraging molecular design polymers green efficient

Language: Английский

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Tungsten Oxide/g-C₃N₄ Heterostructures: Composition, Structure, and Photocatalytic Applications

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

The construction of heterostructures promotes extending the light adsorption range graphitic carbon nitride (g-C3N4) materials, improving photogenerated charge carrier separation/transfer efficiency for attaining much enhanced performances. Because defective tungsten oxide (WOx) materials possess rich composition/morphology and an extended response in near-infrared region, WOx is a quite popular nanocomponent modifying g-C3N4, forming that can be used various photocatalytic applications involving water splitting, CO2 reduction, NOx removal, H2O2 generation, related chemical to fuel conversion reactions. In this review, important aspects WOx/g-C3N4 heterostructure photocatalysts are reviewed provide paradigms composition adjustment, structural design, these materials. growth control amorphous crystalline adjustment on types (e.g., type II Z-scheme), catalytic performances composite system also discussed detail. Moreover, effects synthetic methodologies preparation parameters formation two-dimensional layered inspiration state-of-the-art utilized photoredox challenges prospects future research summarized.

Language: Английский

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