Developing Polymeric Carbon Nitrides for Photocatalytic H₂O₂ Production

ChemSusChem, Journal Year: 2024, Volume and Issue: 17(20)

Published: May 8, 2024

Abstract Hydrogen peroxide (H 2 O ) plays a crucial role in various applications, such as green oxidation processes and the production of high‐quality fuels. Currently, H is primarily manufactured using indirect anthraquinone method, known for its significant energy consumption generation intensive by‐products. Extensive research has been conducted on photocatalytic via oxygen reduction reaction (ORR), with polymeric carbon nitride (PCN) emerging promising catalyst this conversion. This review article organized around two approaches. The first part main consists chemical optimization PCN structure, while second focuses physical integration other functional materials. objective to clarify correlation between physicochemical properties photocatalysts their effectiveness production. Through thorough analysis findings, seeks stimulate new insights achievements, not only domain ORR but also redox reactions.

Language: Английский

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Molten salt-assisted precursor regulation of crystalline g-C3N4 for high-efficient photocatalytic H2O2 production

Applied Surface Science, Journal Year: 2024, Volume and Issue: 670, P. 160634 - 160634

Published: July 2, 2024

Language: Английский

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Furan-Based HTCC/In₂S₃ Heterojunction Achieves Fast Charge Separation To Boost the Photocatalytic Generation of H₂O₂ in Pure Water

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(21), P. 16245 - 16255

Published: Oct. 19, 2024

The limitations imposed by the high carrier recombination rate in current photocatalytic H2O2 production system substantially restrict of generation. Herein, we successfully prepared an In2S3/HTCC dense heterojunction bridged In–S–C bonds through situ polymerization glucose on In2S3. This interfacial bond provides a fast transfer channel for electrons at interface to achieve highly efficient charge efficiency, leading formation enhanced built-in electric field between In2S3 and HTCC, thus dramatically accelerating separation effectively prolonging lifetime photogenerated carriers. Moreover, coverage HTCC enhances absorption visible light sorption O2 In2S3, while lowering its two-electron oxygen reduction reaction (ORR) energy barrier. Notably, our research demonstrates that can generate not only well-known two-step one-electron ORR but also via alternative pathway utilizing 1O2 as intermediate, thereby enhancing production. Benefiting from these advantages, In2S3/HTCC-2 produce up 1392 μmol g–1 h–1 pure aqueous system, which is 18.2 5.2 times higher than respectively. Our work novel synthesis method new organic/inorganic photocatalysts based offers insights into potential mechanism bonding heterostructures regulate activity.

Language: Английский

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Rapid Charge Transfer Endowed by Heteroatom Doped Z‐Scheme Van Der Waals Heterojunction for Boosting Photocatalytic Hydrogen Evolution

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

Published: Jan. 23, 2025

Abstract Constructing heterojunctions between phase interfaces represents a crucial strategy for achieving excellent photocatalytic performance, but the absence of sufficient interface driving force and limited charge transfer pathway leads to unsatisfactory separation processes. Herein, doping‐engineering is introduced construct In─N bond‐bridged In 2 S 3 nanocluster modified doped carbon nitride (CN) nanosheets Z‐Scheme van der Waals (VDW) (In /CNS) photocatalyst, preparation process just by one‐step pyrolysis using pre‐coordination confinement method. Specifically, atoms doping enhances bond strength forms high‐quality interfacial linkage which serves as atomic‐level “highway” improving electrons migration, decreasing recombination probability. The detailed characterization results, along with theoretical calculations, confirm that both atom incorporation formation VDW synergistically improve internal electric field. This, in turn, accelerates simultaneously light absorption capacity. Consequently, optimal hydrogen evolution performance In₂S₃/CNS2 160.8 times greater than In₂S₃, 8.2 higher CNS. This study emphasizes role atomic‐scale regulation intrinsic fields heterojunctions, contributing ameliorative performance.

Language: Английский

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Organic Photocatalysts for Wastewater Decontamination

Journal of Photochemistry and Photobiology C Photochemistry Reviews, Journal Year: 2025, Volume and Issue: unknown, P. 100689 - 100689

Published: Jan. 1, 2025

Language: Английский

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Controllable synthesis of mesoporous Mo₂C nanofibers photocatalyst for H₂O₂ production

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Abstract Photocatalysis is a promising method to alternative anthraquinone for producing hydrogen peroxide (H 2 O ), which clean and important oxidizing agent in industry. Molybdenum carbide (Mo C) attracted much interests as photocatalysts due its high stability, narrow tunable bandgap, good electrical conductivity. However, Mo C always considered co‐catalyst, it still challenge develop explore the role of pure photocatalyst H generation. Meanwhile, controllable synthesis C, especially morphology structures rational design, crucial enhance photocatalytic performance. In this work, mesoporous nanofibers has been synthesized by simple impregnation content was easily regulated modulating concentration molybdenum precursor impregnated solution. The influence composition demonstrated performance possible mechanism proposed. with diameter 170 nm highest 97 wt% (sample MC‐IV) exhibited best production 144 µmol at first hour, two‐electron reduction (2e − ORR). This work may provide general strategy nanomaterials production.

Language: Английский

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Halogen surface modification induced strong interfacial electric field for efficient photocatalytic H2O2 generation

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 692, P. 133849 - 133849

Published: April 2, 2024

Language: Английский

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Recent updates on full solar spectrum metal sulphides photocatalyst for hydrogen peroxide generation: Modification strategies and Mechanistic insights

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 115151 - 115151

Published: Dec. 1, 2024

Language: Английский

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Developing three-dimensional hydrophobic photocatalysts to enhance mass transfer for promoting hydrogen peroxide production

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 129774 - 129774

Published: Sept. 1, 2024

Language: Английский

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Photoelectron “bridge” is introduced to realize the precise transport of C3N5-CoPc interface charge for efficient photocatalytic H2O2 production

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(41), P. 28233 - 28246

Published: Jan. 1, 2024

The photogenerated electrons in C 3 N 5 -CoPc are accurately transferred to the Co atom through phosphate, and is excited as a catalytic center produce H 2 O .

Language: Английский

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