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

ACS Energy Letters, Год журнала: 2024, Номер 9(4), С. 1915 - 1922

Опубликована: Апрель 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.

Язык: Английский

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

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 650, С. 1550 - 1590

Опубликована: Июль 20, 2023

Язык: Английский

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Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction

Small, Год журнала: 2024, Номер unknown

Опубликована: Апрель 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.

Язык: 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, Год журнала: 2023, Номер 481, С. 148297 - 148297

Опубликована: Дек. 25, 2023

Язык: Английский

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

Surfaces and Interfaces, Год журнала: 2023, Номер 42, С. 103352 - 103352

Опубликована: Сен. 6, 2023

Язык: Английский

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

Nano Research, Год журнала: 2023, Номер 17(5), С. 3429 - 3454

Опубликована: Дек. 7, 2023

Язык: 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, Год журнала: 2024, Номер 34(44)

Опубликована: Май 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.

Язык: 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, Год журнала: 2024, Номер 17(9), С. 8007 - 8016

Опубликована: Июль 27, 2024

Язык: Английский

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

Materials Today Catalysis, Год журнала: 2024, Номер 5, С. 100052 - 100052

Опубликована: Май 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.

Язык: 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, Год журнала: 2024, Номер 12(6), С. 3398 - 3410

Опубликована: Янв. 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.

Язык: Английский

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