Defective High-Crystallinity g-C₃N₄ Heterostructures by Double-End Modulation for Photocatalysis

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1915 - 1922

Published: April 3, 2024

Photocatalytic overall water splitting is difficult due to the limitations of band structure, solar absorption efficiency, and carrier recombination. Rich nitrogen vacancies containing g-C3N4 nanosheets were prepared by spark plasma sintering. By modifying highly crystalline graphitic carbon nitride (g-C3N4) with rich as hydrogen- oxygen-producing ends building a Z-scheme heterostructure, can be achieved. Hydrogen oxygen evolution rates (λ > 320 nm) 1.51 0.75 mmol g–1 h–1 reported highest solar-to-hydrogen efficiency 1.39% for pure catalyst cocatalysts under an AM1.5G filter (100 mW cm–2) are reached. The double-ended modulation method improves photocatalytic high-crystallinity defect-rich g-C3N4.

Language: Английский

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Recent advances of modification effect in Co3O4-based catalyst towards highly efficient photocatalysis

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 650, P. 1550 - 1590

Published: July 20, 2023

Language: Английский

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Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction

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

Published: April 30, 2024

Abstract Photocatalytic CO 2 reduction technology, capable of converting low‐density solar energy into high‐density chemical energy, stands as a promising approach to alleviate the crisis and achieve carbon neutrality. Semiconductor metal oxides, characterized by their abundant reserves, good stability, easily tunable structures, have found extensive applications in field photocatalysis. However, wide bandgap inherent oxides contributes poor efficiency photocatalytic reduction. Defect engineering presents an effective strategy address these challenges. This paper reviews research progress defect enhance performance summarizing classifications, preparation methods, characterization techniques. The focus is on engineering, represented vacancies doping, for improving oxide photocatalysts. includes advancements expanding photoresponse range, enhancing photogenerated charge separation, promoting molecule activation. Finally, provides summary current issues challenges faced along with prospective outlook future development technology.

Language: Английский

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Mechanism insight into triple S-Scheme intermolecular carbon nitride homojunction with robust built-in electric field for highly enhanced photocatalytic hydrogen evolution

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 481, P. 148297 - 148297

Published: Dec. 25, 2023

Language: Английский

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Fabrication of NiCo2S4/N-deficient g-C3N4 for efficient photocatalytic H2 production

Surfaces and Interfaces, Journal Year: 2023, Volume and Issue: 42, P. 103352 - 103352

Published: Sept. 6, 2023

Language: Английский

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MXenes/CNTs-based hybrids: Fabrications, mechanisms, and modification strategies for energy and environmental applications

Nano Research, Journal Year: 2023, Volume and Issue: 17(5), P. 3429 - 3454

Published: Dec. 7, 2023

Language: Английский

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Π‐Bridge Modulations in D–π–A Conjugated Microporous Polymers to Facilitate Charge Separation and Transfer Kinetics for Efficient Photocatalysis

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 16, 2024

Abstract The burgeoning field of conjugated microporous polymers (CMPs) has generated widespread interest due to their potential as photocatalysts for hydrogen production from water. Nevertheless, photocatalytic performance is sometimes hindered by inadequate charge separation and transfer, coupled with rapid recombination. Herein, a strategy enhance via the customization π ‐bridges through modulation heteroatoms in series donor‐ ‐acceptor (D‐ ‐A) CMPs proposed. This affords optimized energy levels improved thus boosting efficiency. Among various heteroatom substitutions, S‐doped CMP (10 mg) demonstrates highest evolution rate 203 µmol h −1 (AQY 450nm = 7.4%) under visible light irradiation. Subsequent experimental analysis reveals its superior can be largely related minimized exciton binding energy, facilitated transfer efficiency, impeded recombination among these heteroatom‐doped D‐ ‐A CMPs. research paves way rational design modification organic semiconductors advanced solar‐driven photocatalysis promoting transfer.

Language: Английский

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Experimental and theoretical investigation of sulfur-doped g-C3N4 nanosheets/FeCo2O4 nanorods S-scheme heterojunction for photocatalytic H2 evolution

Nano Research, Journal Year: 2024, Volume and Issue: 17(9), P. 8007 - 8016

Published: July 27, 2024

Language: Английский

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A review: Simultaneous "one-pot" pollution mitigation and hydrogen production from industrial wastewater using photoelectrocatalysis process

Materials Today Catalysis, Journal Year: 2024, Volume and Issue: 5, P. 100052 - 100052

Published: May 22, 2024

This review delves into the underlying principles, advantages, challenges, and recent developments in photoelectrocatalysis (PEC) processes for wastewater treatment green hydrogen production. PEC is an emerging technique that holds great promise addressing two critical challenges simultaneously, namely, degradation of industrial pollutants generation clean energy form gas. In years, many studies have explored use photoanodes to harness solar treatment. These facilitate breakdown contaminants, while cathode concurrently produces hydrogen. The enables production both water gas from wastewater. dual benefit makes it attractive avenue sustainable generation. process capitalizes on constructive interaction between electrochemical reactions photocatalysis. Solar efficiently converted electron-hole pairs, which play a pivotal role water-splitting occurring at electrode surfaces. Achieving best performance involves scrutiny various parameters, including catalyst loading, pH, light intensity, electrolyte composition. photoelectrocatalytic system shows commendable stability durability during extended operation, reinforcing its practical applicability. provides comprehensive overview process, materials, optimization strategies, driving efficiency. Considering potential benefits costs larger scale underscores significance environmental concerns energy-related issues concurrently. Therefore, promising pathway toward energy, bridging gap stewardship technological advancement.

Language: Английский

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Synergistic mediation of dual donor levels in CNS/BOCB-OV heterojunctions for enhanced photocatalytic CO₂ reduction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(6), P. 3398 - 3410

Published: Jan. 1, 2024

Construction of CNS/BOCB-OV heterostructures with N/O vacancies leads to new donor energy levels that create a pathway for interfacial charge transfer improve separation and enhance photocatalytic activities CO 2 reduction.

Language: Английский

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