Interfacial design of pyrene-based covalent organic framework for overall photocatalytic H2O2 synthesis in water

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 1170 - 1180

Published: Sept. 23, 2024

Language: Английский

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Phenolic Resin with an Optimized Donor–Acceptor Architecture for Photocatalytic Aerobic Oxidation

ACS Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 17622 - 17632

Published: Nov. 14, 2024

A promising strategy to enhance exciton dissociation and charge separation in phenolic-polymer-based photocatalysts is the generation utilization of benzenoid–quinoid donor–acceptor (D–A) couples inside phenolic resin frameworks. However, there are often more donors than acceptors due sluggish kinetics situ oxidation phenols quinoid methides, leading a mismatched D/A ratio. Herein, we report well-cross-linked with unity ratio synthesized by using phloroglucinol as building block for condensation formaldehyde. The higher electron density on aromatic ring not only facilitates phloroglucinols forming equivalent D–A couples, but also lowers energy barrier reaction, resulting highly cross-linked framework well-developed π-conjugated electronic structure. phloroglucinol-formaldehyde product demonstrates significantly improved photocatalytic performance selective methyl phenyl sulfide oxidative coupling benzylamine. Our approach shows potential resins solar-induced chemical conversion.

Language: Английский

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Resorcinol–Formaldehyde/TiO₂ Polymer Composites: Efficient Photocatalysts for Oxidation of Water to Hydrogen Peroxide

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1882 - 1892

Published: Jan. 21, 2025

Given its multifaceted important roles such as aqueous oxidant, chemical platform for environmental remediation, possible liquid fuel, and so on, environmentally friendly approaches to produce hydrogen peroxide (H2O2) are highly desirable. In this context, the photocatalytic generation of from water oxidation has emerged a promising method, phenol–formaldehyde-based functional resins have been established an excellent developing photocatalysts oxidation. The present work reports development resorcinol–formaldehyde (RF) TiO2 (RF/TiO2) composites efficient heterogeneous production H2O2 through synthesis RF/TiO2 was accomplished following simple high-temperature hydrothermal it characterized study microstructures optical properties. role optimum amount in improving activity resin by with varied amounts TiO2. As experimentally established, prepared 1.1–1.6% (w/w) feed respect resorcinol at temperature 200 °C under conditions were found be most ones study. Out these composites, RF/TiO2-1.2% RF/TiO2-1.3% resulted ∼500 ∼530 μmol per gram catalyst, respectively, upon 5 h continuous photoirradiation experimental reaction ∼30–35 °C. It observed that rate can enhanced increasing temperature.

Language: Английский

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Self-activated Au4Ni2 System with Electronic Antenna: Boosting Photocatalytic Oxidative Coupling of Amines and Mechanistic Insight

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125121 - 125121

Published: Feb. 1, 2025

Language: Английский

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Robust synergistic effects of doping and defect engineering in photocatalytic H2O2 production

Materials Reports Energy, Journal Year: 2025, Volume and Issue: unknown, P. 100325 - 100325

Published: Feb. 1, 2025

Language: Английский

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Functional Groups‐Regulated Organic Semiconductors for Efficient Artificial Photosynthesis of Hydrogen Peroxide

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

Published: March 18, 2025

Abstract Hydrogen peroxide (H 2 O ) is an environmentally friendly reagent, and organic semiconductors (OSCs) are ideal photocatalysts for the synthesis of H due to their well‐defined molecular structure, strong donor‐acceptor interactions, efficient charge separation. This review discusses regulatory mechanisms functional group modifications in tuning photocatalytic performance OSCs, highlighting relationship between structure catalytic performance. For example, electron‐regulating groups, such as cyano halogen, induce dipoles, facilitating migration photogenerated electrons. Fluorine groups optimize band prolong carrier lifetime high electronegativity. π‐Conjugated extension like anthraquinone thiophene, expand conjugation, improve visible light capture, stabilize intermediates through redox cycles. Hydroxyl enhance surface hydrophilicity promote activation, while imine bond protonation adjusts distribution improves selectivity cycle stability. Multi‐active site sulfonic acid amide, accelerate reaction kinetics inhibit decomposition. Functional absorption, separation, reactions electronic regulation, intermediate adsorption optimization, proton‐electron transfer. Future work should integrate machine learning identify optimal combinations develop green functionalization strategies photocatalyst synthesis.

Language: Английский

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Nonbonded Electronic Coupling between Au and Phenolic Hydroxyl Groups in Resorcinol‐Formaldehyde Resin: Enhanced Interfacial Charge Transfer and H₂O₂ Photosynthesis

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Harnessing sunlight for the direct generation of hydrogen peroxide (H 2 O ) from water and air presents a significant challenge in sustainable chemistry.Resorcinol‐formaldehyde (RF) resins, as emerging donor–acceptor (D‐A) polymeric photocatalysts, encounter limitations stemming inefficient charge transfer. This study introduces design synthesis noble metal (Au, Ag, Pt) nanoparticle‐modified RF with specific focus on Au‐RF due to its exceptional photocatalytic activity. The electronic coupling at interface between Au nanoparticles CO bonds phenolic hydroxyl groups resin facilitates efficient transfer, leading remarkable improvement performance, which is attributed interfacial interactions rather than surface plasmon resonance effects. optimized composite demonstrates record H production rate 252.28 μmol g −1 h solar‐chemical conversion efficiency 1.23% after 6 h, significantly surpassing that pristine resin. research paves way development D‐A photocatalysts under solar irradiation.

Language: Английский

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Development of a g-C3N4-based photocatalysis-self-Fenton system for efficient degradation and mineralization of organic pollutants

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132833 - 132833

Published: April 1, 2025

Language: Английский

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Enhancing photocatalyst stability for hydrogen peroxide synthesis through promoting oxygen-centered organic radical formation

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

Published: March 31, 2025

Language: Английский

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Eco-friendly sacrificial agents-free photocatalytic synthesis of hydrogen peroxide: Recent innovations and future prospects

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 95, P. 935 - 956

Published: Nov. 22, 2024

Language: Английский

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