Bifunctional CdS/COF S-scheme photocatalyst for enhanced H2 evolution and organic synthesis

Chemical Engineering Journal, Год журнала: 2023, Номер 476, С. 146818 - 146818

Опубликована: Окт. 20, 2023

It is an efficient strategy to construct photocatalysts by integrating the advantages of inorganic semiconductors and covalent organic frameworks (COFs) for H2 generation along with simultaneous oxidation. Herein, inorganic/organic CdS/COF (denoted as TpBD) 2D heterostructure fabricated electrostatic self-assembly method. The ultrathin structure can reduce charge transfer distance, enhance light absorption, multiply reaction sites while S-scheme heterojunction improves separation efficiency. composite acquires outstanding photocatalytic activity 15.1 mmol/g/h, simultaneously convert cheap ascorbic acid value-added 2,3-diketo-L-gulonic acid. Hall effect test elucidates dynamics carrier migration. electron paramagnetic resonance analysis, photo-irradiated Kelvin probe force microscopy, femtosecond transient absorption spectroscopy, theoretical calculation, in-situ irradiation X-ray photoelectron spectroscopy measurements confirm superiority transfer. This research presents new inspiration develop hydrogen production green chemical production.

Язык: Английский

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Bifunctional g-C3N4 nanospheres/CdZnS QDs S-scheme photocatalyst with boosted H2 evolution and furfural synthesis mechanism

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 358, С. 124459 - 124459

Опубликована: Июль 29, 2024

Язык: Английский

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Insights into Selective Glucose Photoreforming for Coproduction of Hydrogen and Organic Acid over Biochar-Based Heterojunction Photocatalyst Cadmium Sulfide/Titania/Biochar

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(7), С. 2538 - 2549

Опубликована: Фев. 7, 2024

Biomass photorefinery over a sustainable biochar (BC)-based heterojunction provides promising approach to alleviate the worsening environment and energy crisis via hydrogen (H2) valuable chemicals production. Moreover, no related results have been reported. Here, novel BC-supported CdS/TiO2 photocatalyst (CdS/TiO2/BC) was rationally fabricated by simple hydrothermal calcination methods for glucose photoreforming. The selectivity of value-added modulated alteration base type. BC, with large specific surface area outstanding electrical conductivity, employed as carrier heterojunction, which further facilitated light absorption charge separation. as-synthesized CdS/TiO2/BC exhibited excellent acetic acid (63.94%) together improved H2 generation (∼12.77 mmol g–1 h–1) in 25 mM NaOH solution, while efficient formic (60.29%) (∼10.29 were observed 3 Na2CO3 solution. Trapping tests indicated that ·O2– ·OH promoted production acid. This study initiates insight into design environmentally friendly photocatalysts fuel from biomass photorefinery.

Язык: Английский

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An Electron Transfer Mediated Mechanism for Efficient Photoreforming of Waste Plastics Using a Ni₃S₄/ZnCdS Heterojunction

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract The oxidative degradation of plastics in conjunction with the production clean hydrogen (H 2 ) represents a significant challenge. Herein, Ni 3 S 4 /ZnCdS heterojunction is rationally synthesized and employed for efficient H high‐selectivity value‐added chemicals from waste plastic. By integrating spectroscopic analysis techniques density functional theory (DFT) calculations, solely electron transfer‐mediated reaction mechanism confirmed, wherein extracts electrons ZnCdS (ZCS) to promote spatial segregation photogenerated holes, which not only facilitates but also maintains high oxidation potential holes on ZCS surface, favoring hole‐dominated plastic oxidation. Notably, catalyst exhibited rates as 27.9 17.4 mmol g −1 h , along selectivity 94.2% 78.3% liquid product toward pyruvate acetate polylactic acid (PLA) polyethylene terephthalate (PET), respectively. Additionally, carbon yields 26.5% 2.2% are measured after 9 photoreforming, representing highest values reported date. Overall, this research presents promising approach converting into fuel valuable chemical products, offering solution growing issue “ White Pollution ”.

Язык: Английский

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Interfacial interaction-induced shift of d-band center promotes photocatalytic antibiotics mineralization

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 352, С. 123998 - 123998

Опубликована: Апрель 21, 2024

Язык: Английский

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Flower-like NiFe layered double hydroxide/Bi2WO6 S-scheme heterojunction for photodegradation of ciprofloxacin under visible light

Surfaces and Interfaces, Год журнала: 2024, Номер unknown, С. 105213 - 105213

Опубликована: Окт. 1, 2024

Язык: Английский

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Internal electric field promoted charge separation via bismuth-based ternary heterojunctions with near-infrared light harvesting properties for efficient photoredox reactions

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(29), С. 18498 - 18511

Опубликована: Янв. 1, 2024

This study highlights the single-step growth of Bi/Bi 2 WO 6 /Bi S 3 on CdS nanorods and their built-in electric field modulated charge separation toward a UV-vis-NIR driven photocatalytic H evolution reaction.

Язык: Английский

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Natural Sunlight Induced Photocatalytic Hydrogen Evolution by SrTaO2N/CdS Nanocomposites

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 178790 - 178790

Опубликована: Янв. 1, 2025

Язык: Английский

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Construction of a 1 T/2H-WS2 and ZnCdS type II heterojunction with a built-in electric field for efficient photocatalytic hydrogen evolution

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179965 - 179965

Опубликована: Март 1, 2025

Язык: Английский

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Integrating CaIn2S4 nanosheets with Co3O4 nanoparticles possessing semiconducting and electrocatalytic properties for efficient photocatalytic H2 production

Ceramics International, Год журнала: 2023, Номер 50(2), С. 3052 - 3063

Опубликована: Ноя. 4, 2023

Язык: Английский

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