D–A Conjugated Polymer/CdS S‐Scheme Heterojunction with Enhanced Interfacial Charge Transfer for Efficient Photocatalytic Hydrogen Generation

Small, Journal Year: 2024, Volume and Issue: 20(31)

Published: March 5, 2024

Abstract Owing to the improved charge separation and maximized redox capability of system, Step‐scheme (S‐scheme) heterojunctions have garnered significant research attention for efficient photocatalysis H 2 evolution. In this work, an innovative linear donor–acceptor (D–A) conjugated polymer fluorene‐alt‐(benzo‐thiophene‐dione) (PFBTD) is coupled with CdS nanosheets, forming organic–inorganic S‐scheme heterojunction. The CdS/PFBTD (CP) composite exhibits impressed hydrogen production rate 7.62 mmol g −1 h without any co‐catalysts, which ≈14 times higher than pristine CdS. It revealed that outstanding photocatalytic performance attributed formation rapid electron transfer channels through interfacial Cd─O bonding as evidenced by density functional theory (DFT) calculations in situ X‐ray photoelectron spectroscopy (XPS) analysis. mechanism involved further investigated photo‐irradiated Kelvin probe force microscopy (KPFM) This work provides a new point view on points out direction designing superior heterojunction photocatalysts.

Language: Английский

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Upgrading Single S-Scheme Heterojunction to Multi-S-Scheme Ones for Better Synergy of Photocatalytic CO₂ Reduction and H₂O Oxidation: The Third Component Location Matters

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(16), P. 12529 - 12540

Published: Aug. 6, 2024

Upgrading single S-scheme heterojunctions to multi-S-scheme ones through implanting another component provides a promising means of simultaneously optimizing the charge transport dynamics and surface reaction kinetics, which, however, is challenged by uncontrollable loading position third component. Herein, component-directed growth strategy implemented for deliberate deposition ZnIn2S4 onto diverse locations In2O3/CdS, constructing twin triple heterojuctions with distinct transfer pathways. The photocatalytic performances as-synthesized ternary in CO2 reduction coupled H2O oxidation strongly correlate location ZnIn2S4. selective coating CdS expedites separation, ensures large-area exposure In2O3 smooth oxidation, modulates energy barriers promoted CO2-to-CO transformation while suppressing side H2 evolution, raises electron density proton supply methanation. Consequently, In2O3/CdS@ZnIn2S4 achieves optimum activities selectivities CO CH4 production, along nearly stoichiometric O2 evolution. This work not only offers valuable insights rational design three-component heterojunction photocatalysts multiple pathways but also opens up fresh avenue precisely regulate enhancing overall efficiency photoredox catalysis.

Language: Английский

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Enhanced piezo-photocatalytic performance in ZnIn2S4/BiFeO3 heterojunction stimulated by solar and mechanical energy for efficient hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 662, P. 276 - 288

Published: Feb. 6, 2024

Language: Английский

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Piezoelectric effect-assisted Z-scheme heterojunction ZnIn2S4/BaTiO3 for improved photocatalytic reduction of CO2 to CO

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149058 - 149058

Published: Feb. 2, 2024

Language: Английский

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Bifunctional noble-metal-free cocatalyst coating enabling better coupling of photocatalytic CO2 reduction and H2O oxidation on direct Z-scheme heterojunction

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 5022 - 5030

Published: March 2, 2024

Language: Английский

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Broad-spectrum hybrid-driven triple-interface Z-Scheme 1T/2H phase sailboat-like molybdenum disulfide (MoS2)/protonated N-defect nanoporous graphitic carbon nitride (g-C3N4) nanosheets piezo-photocatalyst: Superior degradation and hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 665, P. 655 - 680

Published: March 25, 2024

Language: Английский

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Efficient photocatalytic conversion of xylose to co-produce xylonic acid and CO via a dual S-scheme heterojunction photocatalyst between carbon nitride and CuInS₂ quantum dot-sensitized ZnIn₂S₄

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(5), P. 2893 - 2902

Published: Jan. 1, 2024

Heterojunction photocatalysts receive significant interest due to their high performance and easy fabrication.

Language: Английский

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The p-n heterojunction with multi-parallel built-in electric fields forms localized "electron sink" for directional non-uniform transfer of photogenerated carriers

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 347, P. 123825 - 123825

Published: April 24, 2024

Language: Английский

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Internal Electric Field‐Induced High‐Efficiency Piezo‐Photocatalytic Performance in Bimetal‐Regulated Layered Perovskite SrBi₂Nb₂O₉

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 20, 2024

Abstract The piezoelectric effect is employed to enhance the photocatalytic process by enabling efficient utilization of photogenerated electrons and holes. In this study, a defect‐engineered Na–Sm bimetal‐regulated layered ferroelectric material, SrBi 2 Nb O 9 , synthesized using molten salt process, exhibits excellent piezo‐photocatalytic performance in synergistic removal uranium [U(VI)] tetracycline (TC) from wastewater. incorporation Sm dopant creates an intermediate band structure, while Na doping introduces empty orbitals into conduction band, thereby enhancing electrical conductivity, improving electron mobility, supplying sufficient promote catalytic reactions. Moreover, induces additional internal electric field, which combines embedded field along b ‐axis with polarization ‐axis. This combined enhances anisotropic migration holes, facilitating their spatial separation. doped can simultaneously remove 98% U(VI) degrade 99% TC. Furthermore, enhancement observed between reduction TC oxidation reactions, rate constant being 1.2 times higher than that individual system. work presents innovative strategy for designing catalysts able pollutants optimize redox

Language: Английский

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Application of modified cerium dioxide for photocatalytic air pollution purification

Rare Metals, Journal Year: 2024, Volume and Issue: 43(11), P. 5473 - 5486

Published: June 24, 2024

Language: Английский

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