Twin S-Scheme g-C₃N₄/CuFe₂O₄/ZnIn₂S₄ Heterojunction with a Self-Supporting Three-Phase System for Photocatalytic CO₂ Reduction: Mechanism Insight and DFT Calculations

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(7), P. 5326 - 5343

Published: March 26, 2024

The use of photocatalytic solar energy to drive CO2 reduction is beneficial for addressing fossil fuel shortages and environmental pollution issues. We synthesized a twin S-scheme g-C3N4/CuFe2O4/ZnIn2S4 heterojunction, which was used construct self-supporting three-phase system reduction. Two built-in electric fields in this heterojunction induced effective migration photogenerated carriers, resulting wide light response range strong oxidation ability. This without sacrificial agent had high CH4 selectivity (96.8%) surprise production rate (267.4 μmol g–1 h–1), still maintained an excellent cycle (249–267.4 h–1) during five cycles. In addition, possessed both hydrophilicity hydrophobicity, achieved efficient transformation into by controlling interface wettability. g-C3N4 as hydrophobic layer promoted mass transfer achieve the enrichment on surface; ZnIn2S4 hydrophilic could well adsorb H2O, further oxidized holes many protons (H+). Finally, DFT calculations found that Fe–N bonds located between CuFe2O4 played crucial role They served bridge electron induce bending adsorption CO2, enhanced *CO stabilization *H.

Language: Английский

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Facile construction of CuO/g-C3N4 heterojunctions with promoted photocatalytic hydrogen generation behaviors

Fuel, Journal Year: 2023, Volume and Issue: 353, P. 129224 - 129224

Published: July 19, 2023

Language: Английский

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Photocatalytic self-Fenton degradation of ciprofloxacin over S-scheme CuFe2O4/ZnIn2S4 heterojunction: Mechanism insight, degradation pathways and DFT calculations

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 149165 - 149165

Published: Feb. 1, 2024

Language: Английский

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Recent advances in g-C3N4-based direct Z-scheme photocatalysts for environmental and energy applications

Chinese Journal of Structural Chemistry, Journal Year: 2024, Volume and Issue: 43(2), P. 100214 - 100214

Published: Jan. 12, 2024

Language: Английский

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Cu/Zn-bimetallic organic framework-derived RGO/CuO–ZnO Z-scheme heterojunction for efficient photocatalytic hydrogen production

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 103, P. 45 - 52

Published: Jan. 16, 2025

Language: Английский

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Ternary dual S-scheme In2O3/SnIn4S8/CdS heterojunctions for boosted light-to-hydrogen conversion

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 650, P. 416 - 425

Published: July 1, 2023

Language: Английский

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Efficient degradation of ciprofloxacin by a flower-spherical Bi2MoO6/BiOCl Z-type heterojunction photocatalyst enriched with oxygen vacancies

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(6), P. 111235 - 111235

Published: Oct. 11, 2023

Language: Английский

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Photoreduction of Aqueous Protons Coupling with Alcohol Oxidation on a S‐Scheme Heterojunction Photocatalyst MnO/Carbon Nitride

Small, Journal Year: 2023, Volume and Issue: 20(12)

Published: Nov. 6, 2023

Abstract Crystalline carbon nitride (CCN), derived from amorphous polymeric CN, is considered as a new generation of metal‐free photocatalyst because its high crystallinity. In order to further promote the photocatalytic performance CCN, p‐type MnO nanoparticles are in situ synthesized and merged with n‐type CCN through one‐pot process form p–n heterojunction. The formed interfacial electric field between semiconductors different work functions efficiently breaks coulomb interaction CCN. prepared catalysts exhibit drastically increased hydrogen evolution (PHE) activity integrated oxidation alkyl aryl alcohols under irradiation visible light. aqueous solution benzyl alcohol (BzOH), rate over MnO/CCN (39.58 µmol h −1 ) nearly 7 times 37 that pure (5.76 CN (1.06 ), respectively, combining BzOH benzaldehyde. This proposes an avenue for construction novel 2D material‐based S‐scheme heterojunction extends application solar energy conservation utilization.

Language: Английский

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S‐Modified Graphitic Carbon Nitride with Double Defect Sites For Efficient Photocatalytic Hydrogen Evolution

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

Published: Oct. 3, 2024

Abstract Graphitic carbon nitride (gC 3 N 4 ) is an attractive photocatalyst for solar energy conversion due to its unique electronic structure and chemical stability. However, gC generally suffers from insufficient light absorption rapid compounding of photogenerated charges. The introduction defects atomic doping can optimize the improve carrier separation efficiency. Herein, high efficiency photocatalysis hydrogen evolution in visible achieved by S‐modified double‐deficient site strategy. Defect engineering forms abundant unsaturated sites cyano (─C≡N), which promotes strong interlayer C─N bonding interactions accelerates charge transport . S tunes semiconductors, formation C─S─C bonds optimizes electron‐transfer paths bonding, enhances light. Meanwhile,C≡N acts as electron trap capture photoexcited electrons, providing active reduction H + hydrogen. photocatalytic SDCN (1613.5 µmol g −1 h 31.5 times higher than that pristine MCN (51.2 ). situation transfer mechanism photocatalysts are investigated detail a combination experimental theoretical calculations.

Language: Английский

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Recent advances in graphitic carbon nitride-based photocatalysts for solar-driven hydrogen production

Materials Reports Energy, Journal Year: 2023, Volume and Issue: 3(4), P. 100235 - 100235

Published: Oct. 27, 2023

Due to the abundance and sustainability of solar energy, converting it into chemical energy obtain clean presents an ideal solution for addressing environmental pollution shortages stemming from extensive combustion fossil fuels. In recent years, hydrogen has emerged on stage history as most promising carrier 21st century. Among current methods producing hydrogen, photocatalytic production technology, a zero-carbon approach high calorific value pollution-free attracted much attention since its discovery. As core photocatalysis semiconductor photocatalysts are always research hotspots. them, graphite-phase carbon nitride (g-C3N4), organic material composed only C N elements, possesses physicochemical properties incomparable those traditional inorganic materials, including suitable band positions, easy structural regulation, inexpensive raw materials abundant reserves, simple preparation, thermal/mechanical/chemical stability, etc. Therefore, g-C3N4 in field last two decades. This review comprehensively outlines trajectory production, encompassing development, preparation methods, advantages, disadvantages. A concise introduction is provided, well analysis underlying mechanism system. Additionally, delves latest techniques enhance performance, nanostructure design, elemental doping, heterojunction construction. The applications based surveyed, underscoring significance catalyst active sites synthesis pathways. At length, concluded insights challenges opportunities presented by achieving heightened production.

Language: Английский

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