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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Nitro-functionalized covalent organic frameworks inducing strong internal electric-field to boost photosynthesis of hydrogen peroxide from water, air and sunlight

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125263 - 125263

Published: March 1, 2025

Language: Английский

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Regulating Electron Distribution in Regioisomeric Covalent Organic Frameworks for Efficient Solar‐Driven Hydrogen Peroxide Production

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

Published: March 20, 2025

Abstract Covalent organic frameworks (COFs) are emerging as a transformative platform for photocatalytic hydrogen peroxide (H 2 O ) production due to their highly ordered structures, intrinsic porosity, and molecular tunability. Despite potential, the inefficient utilization of photogenerated charge carriers in COFs significantly restrains efficiency. This study presents two regioisomeric COFs, α ‐TT‐TDAN COF β COF, both incorporating thieno[3,2‐b]thiophene moieties, investigate influence regioisomerism on excited electron distribution its impact performance. The demonstrates remarkable solar‐to‐chemical conversion efficiency 1.35%, outperforming ‐isomeric counterpart, which is merely 0.44%. Comprehensive spectroscopic computational investigations reveal critical role subtle substitution change electronic properties. structural adjustment intricately connects structure dynamics, enabling precise regulation distribution, efficient separation transport, localization electrons at active sites. Moreover, this finely tuned interplay enhances oxygen reduction reaction. These findings establish new paradigm design, offering molecular‐level strategy advance reticular materials toward energy conversion.

Language: Английский

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Ultrafast Charge Dynamics in Nitrogen‐Rich Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis

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

Published: April 7, 2025

Abstract Four new tetrazine‐based COFs, DT‐COF‐ n ( = 0–3, indicating the number of ─OH groups), incorporating diamino‐bis‐tetrazine and hydroxy‐functionalized benzo‐tri‐carbaldehyde monomers are used to explore link between bonding reversibility in supramolecular chemistry photocatalytic H 2 O production. DT‐COFs exhibit an exceptionally high nitrogen content, with 72 atoms per pore structure, accounting for 50.3% framework composition‐far exceeding previously reported COFs less than 32% nitrogen. This density, coupled strong electron‐accepting nature tetrazine units azo linker, promotes charge separation stabilization, critical efficient photocatalysis. DT‐COF‐1, which includes a single hydroxyl group, shows highly ordered structure extended conjugation. led yield 4300 µmol g −1 h apparent quantum 14.1% at 420 nm under visible light water. With respect peroxide yield, DT‐COF‐1 outperforms most other produce peroxide. also achieves ultrafast intramolecular electron transfer (<500 fs) prolonged excited state lifetime (≈90 ps). In situ paramagnetic resonance spectroscopy DFT calculations suggest Yeager‐type absorption •− intermediate, favoring

Language: Английский

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Structural design and property regulation of organic polymers for photocatalytic synthesis of H₂O₂

InfoScience., Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Hydrogen peroxide (H 2 O ), an environmentally benign oxidizer, finds extensive applications in pulp bleaching, wastewater treatment, and medical sterilization. Photocatalytic H synthesis via water oxygen activation on semiconductor surfaces presents a sustainable production strategy. Notably, structurally tunable organic photocatalysts have emerged as promising candidates, which targeted molecular engineering can boost the photocatalytic performance by enlarging specific surface areas, extending light absorption ranges, facilitating charge carrier transport‐separation dynamics. Given growing significance of synthesis, comprehensive review this field has become imperative. This paper offers systematic examination visible‐light‐driven using various photocatalysts, including graphitic carbon nitride (g‐C 3 N 4 resorcinol‐formaldehyde (RF) resin, covalent frameworks (COFs), linear conjugated polymers (LCPs). The focus lies fundamental mechanistic elucidation, design reaction pathways active sites, modification strategies, establishment efficient systems. Extensive studies correlated efficiency with interfacial electron transfer kinetics spatial separation. Therefore, we methodically analyze key determinants governing photogenerated dynamics present strategies for enhancement. Furthermore, discuss emerging application scenarios enabled generation. Importantly, critically evaluates persistent challenges cutting‐edge solutions visible‐light‐mediated ultimately providing principles developing high‐efficiency photocatalysts.

Language: Английский

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Topology Engineering Promoting Electron Transfer in Phthalocyanine-Based Polymer Electrocatalysts for Oxygen Reduction

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Language: Английский

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Linkage Conversion in Pyrene-based Covalent Organic Frameworks for Promoted Photocatalytic Hydrogen Peroxide Generation in a Biphasic System

Chemical Research in Chinese Universities, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

Language: Английский

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Overall solar H2O2 generation in water and real seawater by covalent organic frameworks with kgd topology

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158983 - 158983

Published: Dec. 1, 2024

Language: Английский

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