Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Chemical Communications, Год журнала: 2022, Номер 59(6), С. 688 - 699

Опубликована: Дек. 21, 2022

This feature article introduces the basic principles of femtosecond transient absorption spectroscopy (fs-TAS) and recent advances in application fs-TAS to heterojunction photocatalysts.

Язык: Английский

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Conferring BiVO₄ Nanorods with Oxygen Vacancies to Realize Enhanced Sonodynamic Cancer Therapy

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(44)

Опубликована: Сен. 9, 2022

Abstract Owing to the high depth of tissue penetration, non‐invasiveness, and controllability, ultrasound (US)‐mediated sonodynamic therapy (SDT) has shown broad application prospects for tumor treatment. However, electron‐hole separation inefficiency sonosensitizers hypoxia remain two major challenges limiting effect SDT. Here, ultrafine photoetched bismuth vanadate (BiVO 4 ) nanorods modified with DSPE‐PEG 2000 (PEBVO@PEG NRs) were fabricated achieve in situ self‐supply oxygen (O 2 reactive species (ROS) hypoxic therapy. The photoetching approach could enhance charge by inducing enriched vacancies on surface BiVO , thereby improving generation efficiency ROS O . PEBVO@PEG overcome main obstacles traditional SDT process show promising therapeutic effects, thus providing new strategies performance sonosensitizer elimination.

Язык: Английский

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A review of recent advances in alkaline electrolyzer for green hydrogen production: Performance improvement and applications

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 49, С. 458 - 488

Опубликована: Авг. 25, 2023

Язык: Английский

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Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

EcoEnergy, Год журнала: 2023, Номер 1(1), С. 108 - 153

Опубликована: Сен. 1, 2023

Abstract Photoelectrochemical (PEC) water splitting with zero carbon emissions is a promising technology to solve the global issues of energy shortage and environmental pollution. However, current development PEC systems facing bottleneck low solar‐to‐hydrogen (STH) efficiency (<10%), which cannot meet demand large‐scale H 2 production. The low‐cost, highly active, stable photoanode materials crucial for high STH splitting. recent BiVO 4 as has been great success, ABO ‐type ternary metal oxides similar structure have potential efficient photoanodes high‐performance design are critically reviewed special emphasis on modification strategies performance improvement mechanisms each semiconductor. comprehensive analysis in this review provides guidelines insights exploration new high‐efficiency solar fuel

Язык: Английский

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Earth-abundant photoelectrodes for water splitting and alternate oxidation reactions: Recent advances and future perspectives

Progress in Materials Science, Год журнала: 2023, Номер 134, С. 101073 - 101073

Опубликована: Янв. 12, 2023

Язык: Английский

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Gradient‐Tuned VO₄ Vacancies in BiVO₄ Photoanode for Boosting Bulk Hole Transport and Oxygen Evolution Reaction Performance

Advanced Functional Materials, Год журнала: 2024, Номер 34(30)

Опубликована: Фев. 29, 2024

Abstract Although bismuth vanadate (BiVO 4 ) photoanode has been widely used, the solar‐driven oxygen evolution reaction (OER) performance is constrained due to substantial bulk recombination and poor mobility of charge carriers. Herein, a facile solvothermal post‐treatment approach that employs N,N‐dimethylformamide (DMF) developed induce VO vacancy gradient from surface BiVO film, which not only improves diffusion but also establishes an advantageous upward band promote hole transport. Under Air Mass 1.5 Global (AM1.5G) simulated solar illumination, optimized with (denoted as B(VO) 1‐δ exhibits excellent OER separation efficiency 74.4% at 1.23 V versus reversible hydrogen electrode (RHE) incident‐photon‐to‐current conversion 30.7% 445 nm, 1.2 1.4 times higher than pristine , respectively. After loading nickel‐iron hydroxyl oxide (NiFeOOH) cocatalyst, photocurrent density escalates 5.92 mA cm −2 in scavenger (Na 2 SO 3 solution 5.07 potassium borate buffer RHE, far superior . This work highlights gradient‐tuned vacancies can effectively modulate structure transfer photoanode, providing new strategy for boosting water splitting performance.

Язык: Английский

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A standalone bismuth vanadate-silicon artificial leaf achieving 8.4% efficiency for hydrogen production

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 21, 2025

Abstract The development of scalable photoelectrochemical water splitting with high solar-to-hydrogen efficiency and long-term stability is essential while challenging for practical application. Here, we design a BiVO 4 photoanode gradient distributed oxygen vacancies, which induces strong dipole fields to promote charge separation. Growing sea-urchin-like FeOOH cocatalyst on the leads photocurrent density 7.0 mA cm −2 at 1.23 V versus reversible hydrogen electrode stable over 520 h under AM 1.5 G illumination. By integrating silicon photovoltaic cell, standalone artificial leaf achieves 8.4%. scale-up these leaves up 441 2 in size can deliver 2.7% natural sunlight. Life cycle assessment analysis shows that solar has little environmental footprint production. Our study demonstrates possibility designing metal oxide-based

Язык: Английский

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Review on BiVO₄-Based Photoanodes for Photoelectrochemical Water Oxidation: The Main Influencing Factors

Energy & Fuels, Год журнала: 2022, Номер 36(17), С. 9932 - 9949

Опубликована: Авг. 15, 2022

Photoelectrochemical (PEC) water splitting has been considered as a promising technology to produce hydrogen clean energy, and the electrode material is one of main reasons restricting its development. Bismuth vanadate (BiVO4) photoanode for PEC oxidation with advantages low cost, visible light absorption, suitable band edge location. Since BiVO4 was reported, tremendous efforts have used improve performance, significant achievements made. This minireview first briefly introduces theory basic properties then summarizes effects absorption efficiency, charge separation transfer stability on performance BiVO4-based photoanodes. Finally, challenges prospects future research photoanodes are proposed solar energy production.

Язык: Английский

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In-situ topotactic construction of novel rod-like Bi2S3/Bi5O7I p-n heterojunctions with highly enhanced photocatalytic activities

Journal of Material Science and Technology, Год журнала: 2022, Номер 135, С. 126 - 141

Опубликована: Авг. 10, 2022

Язык: Английский

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Structural Engineering of BiVO₄/CoFe MOF Heterostructures Boosting Charge Transfer for Efficient Photoelectrochemical Water Splitting

Small, Год журнала: 2022, Номер 19(9)

Опубликована: Дек. 29, 2022

Boosting charge separation and transfer of photoanodes is crucial for providing high viability photoelectrochemical hydrogen (H2 ) generation. Here, a structural engineering strategy designed synthesized uniformly coating an ultrathin CoFe bimetal-organic framework (CoFe MOF) layer over BiVO4 photoanode boosted transfer. The photocurrent density the optimized /CoFe MOF(NA) reaches value 3.92 mA cm-2 at 1.23 V versus reversible electrode (RHE), up to 6.03 times that pristine , due greatly increased efficiency separation. In addition, this records one onset potential considerably shifted negatively when compared . Transient absorption spectroscopy reveals prolongs recombination lifetime by blocking hole-transfer pathway from its surface trap states. This work sheds light on boosting through enhance solar H2 production.

Язык: Английский

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