Construction of 2D S‐Scheme Heterojunction Photocatalyst

Advanced Materials, Год журнала: 2023, Номер 36(8)

Опубликована: Ноя. 22, 2023

Abstract Semiconductor photocatalytic technology holds immense promise for converting sustainable solar energy into chemically storable energy, with significant applications in the realms of and environment. However, inherent issue rapid recombination photogenerated electrons holes hinders performance single photocatalysts. To overcome this challenge, construction 2D S‐scheme heterojunction photocatalysts emerges as an effective strategy. The deliberate design dimensionality ensures a substantial interfacial area; while, charge transfer mechanism facilitates efficient separation maximizes redox capabilities. This review commences fresh perspective on heterojunctions, followed by comprehensive exploration preparation methods characterization techniques. Subsequently, recent advancements are summarized. Notably, behind activity enhancement is elucidated. Finally, prospects development presented.

Язык: Английский

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Highly Selective Photoconversion of CO₂ to CH₄ over SnO₂/Cs₃Bi₂Br₉ Heterojunctions Assisted by S-Scheme Charge Separation

ACS Catalysis, Год журнала: 2023, Номер 13(19), С. 12623 - 12633

Опубликована: Сен. 13, 2023

Exploring photocatalysts to promote the conversion of CO2 valuable chemical fuels is a highly promising approach for mitigating energy scarcity and environmental pollution. Lead-free perovskite Cs3Bi2Br9 quantum dots (QDs) have attracted considerable attention in photoreduction due robust reduction capability controllable product selectivity. Nevertheless, their potential has been impeded by rapid recombination charge carriers, leading unsatisfactory photocatalytic efficiency. Here, unique SnO2/Cs3Bi2Br9 S-scheme heterojunctions are constructed electrostatically self-assembling SnO2 nanofibers with QDs enhance performance. Density functional theory calculations, along experimental studies, reveal that electrons transfer from SnO2, creating directed interfacial electric field bending bands at interfaces. This facilitates transport photoelectrons Cs3Bi2Br9, forming enabling effective separation powerful photoexcited electron/hole pairs. Additionally, profiting enhanced light absorption contributed narrow-bandgap lower barrier CH4 production over surface, heterostructures unveil superior activities high selectivity 70%, without assistance any molecular catalyst or scavenger.

Язык: Английский

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Research Progress on Photocatalytic CO₂ Reduction Based on Perovskite Oxides

Small, Год журнала: 2023, Номер 19(38)

Опубликована: Май 17, 2023

Abstract Photocatalytic CO 2 reduction to valuable fuels is a promising way alleviate anthropogenic emissions and energy crises. Perovskite oxides have attracted widespread attention as photocatalysts for by virtue of their high catalytic activity, compositional flexibility, bandgap adjustability, good stability. In this review, the basic theory photocatalysis mechanism over perovskite oxide are first introduced. Then, oxides' structures, properties, preparations presented. detail, research progress on photocatalytic discussed from five aspects: photocatalyst in its own right, metal cation doping at A B sites oxides, anion O oxygen vacancies, loading cocatalyst constructing heterojunction with other semiconductors. Finally, development prospects put forward. This article should serve useful guide creating oxide‐based that more effective reasonable.

Язык: Английский

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Ultrathin BiOCl-OV/CoAl-LDH S-scheme heterojunction for efficient photocatalytic peroxymonosulfate activation to boost Co (IV)=O generation

Water Research, Год журнала: 2024, Номер 258, С. 121774 - 121774

Опубликована: Май 20, 2024

Язык: Английский

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Boosting Artificial Photosynthesis: CO₂ Chemisorption and S-Scheme Charge Separation via Anchoring Inorganic QDs on COFs

ACS Catalysis, Год журнала: 2024, Номер 14(3), С. 1951 - 1961

Опубликована: Янв. 22, 2024

Photocatalytic conversion of CO2 into valuable hydrocarbon fuels holds great promise in addressing emerging energy shortages and environmental crises while fulfilling pressing societal national development demands. Nonetheless, its efficiency is hindered by restricted chemisorption, rapid electron–hole recombination, weak redox capability. Drawing inspiration from the distinctive characteristics Schiff-based covalent organic frameworks (COFs), including substantial specific surface area, unique pore structure, an abundance weakly alkaline nitrogen elements, we employ TPA-COF to enhance chemisorption activation acidic molecules, as validated CO2-temperature-programmed desorption analysis. Furthermore, anchoring CsPbBr3 quantum dots (QDs) onto COF facilitates effective spatial separation photoinduced charge carriers with strong capability, resulting formation S-scheme heterojunctions between QDs substantiated situ irradiation X-ray photoelectron spectroscopy, femtosecond transient absorption density functional theory simulations. As anticipated, optimized COF/QDs heterostructures exhibit remarkable enhancements photoreduction performance absence any molecule cocatalyst or scavenger, yielding CO CH4 at rates 41.2 13.7 μmol g–1, respectively. This work provides insights novel organic/inorganic heterojunction photocatalysts separation, offering potential for sustainable artificial photosynthesis.

Язык: Английский

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Asymmetric Atomic Dual‐Sites for Photocatalytic CO₂ Reduction

Advanced Materials, Год журнала: 2024, Номер 36(38)

Опубликована: Июль 23, 2024

Abstract Atomically dispersed active sites in a photocatalyst offer unique advantages such as locally tuned electronic structures, quantum size effects, and maximum utilization of atomic species. Among these, asymmetric dual‐sites are particular interest because their charge distribution generates local built‐in electric potential to enhance separation transfer. Moreover, the dual provide flexibility for tuning complex multielectron multireaction pathways, CO 2 reduction reactions. The coordination opens new possibilities engineering structure–activity–selectivity relationship. This comprehensive overview discusses efficient sustainable photocatalysis processes photocatalytic reduction, focusing on strategic active‐site design future challenges. It serves timely reference development conversion processes, specifically exploring here exemplified by into valuable chemicals.

Язык: Английский

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S-scheme heterojunction photocatalysts based on 2D materials

Materials Today, Год журнала: 2024, Номер unknown

Опубликована: Окт. 1, 2024

Язык: Английский

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Quantum dots in S-scheme photocatalysts

Materials Today, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский

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Lead-free perovskite Cs3Bi2Br9 quantum dots (QDs)/ultra-thin W18O49 nanobelts S-scheme heterojunction toward optimized photocatalytic CO2 reduction coupled with toluene oxidation

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159635 - 159635

Опубликована: Янв. 1, 2025

Язык: Английский

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Potential of Bi2WO6-based heterojunction photocatalysts for environmental remediation

Materials Today Chemistry, Год журнала: 2023, Номер 32, С. 101633 - 101633

Опубликована: Июль 9, 2023

Язык: Английский

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