Construction of a heterojunction between Ni/Al layered double oxides and CdS quantum dots for efficient photocatalytic hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137531 - 137531

Published: April 1, 2025

Language: Английский

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d‐Orbital Single Electron Filling O─O π* Bonds on WO₃S₁ Sites for Highly Selective Generation of Hydroxyl Radicals

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Hydroxyl radical (•OH) stemming from dissolved oxygen (O 2 ) via photocatalysis is very attractive, but its poor selectivity and generation efficiency greatly limit application. Herein, a kind of tungsten single site co‐coordinated with O S atoms (WO 3 1 established on ZnIn 4 (W‐ZIS). The strong interactions in WO shift the d ‐band center toward Fermi level, enhancing adsorption . These improve accumulation photo‐generated electrons , facilitating dissociation O─O bonds crucial intermediates promoting selective conversion into •OH. This brings state‐of‐the‐art (40.2%) (1668.90 mmol. g −1 L h •OH production. Experimental results theoretical simulations have elucidated that can be reduced by ‐orbitals electron ( ↑ _, _) transfer to p ‐orbital pi anti‐bonding π* : x y ), initially activating Additionally, sites facilitate cleavage H O, optimizing proton through W─O orbital coupling transformation oxygen‐containing intermediates. More importantly, fill bond •OOH intermediate, weakening covalency bond, mitigating formation shortening pathway for generation.).

Language: Английский

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Distinguished heterojunction and co-catalyst behaviors on tungsten doped BiVO4 for photoelectrochemical catalytic water splitting reaction

Materials Today Sustainability, Journal Year: 2023, Volume and Issue: 24, P. 100488 - 100488

Published: July 31, 2023

Language: Английский

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Improved Conductivity and in Situ Formed Heterojunction via Zinc Doping in CuBi₂O₄ for Photoelectrochemical Water Splitting

ChemPhysChem, Journal Year: 2024, Volume and Issue: 25(8)

Published: Feb. 7, 2024

Abstract As a photocathode with band gap of about 1.8 eV, copper bismuthate (CuBi 2 O 4 ) is promising material for photoelectrochemical (PEC) water splitting. However, weak charge transfer capability and severe carrier recombination suppress the PEC performance CuBi . In this paper, conductivity carriers transport are improved via introducing Zn 2+ into synthesis precursor , driving beneficial 110 mV positive shift onset potential in photocurrent. Detailed investigations demonstrate that introduction an appropriate amount zinc leads to situ segregation ZnO which serves as electron channel on surface forming heterojunctions. The synergistic effect heterojunctions doping simultaneously promotes concentration. OCP experiment proves ZnO/Zn−CuBi possesses better separation; Mott–Schottky curve shows significantly enhances concentration; lifetime calculated from time–resolved photoluminescence confirms faster extraction carriers.

Language: Английский

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Exploring the photoelectrochemical process through surface states of plasmonic Ag-loaded NiFe-LDH-modified CuWO4 photoanode

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 689, P. 133647 - 133647

Published: March 6, 2024

Language: Английский

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