Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO₃/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(14), P. 6500 - 6513

Published: March 27, 2024

It is a challenging task to design piezoelectric photocatalyst with excellent performance under mechanical agitation instead of ultrasonic irradiation. Integrating vacancy defects into heterojunction seems be an effective strategy for synergistically increasing its piezo-photocatalytic performance. For this goal, two-step hydrothermal method was adopted architect type-I oxygen-vacancy-rich BaTiO3/BiOBr surge the degradation Rhodamine B (RhB) combined action simulated sunlight irradiation and agitation. Various instrumental techniques demonstrated formation high crystallinity. The existence surface oxygen vacancies confirmed by XPS EPR tests. PFM results manifested that had properties, response value 30.31 pm V–1. Comparative experiments indicated RhB efficiency piezo-photocatalysis over largely exceeded total sum those piezocatalysis photocatalysis. h+, ·O2–, 1O2 were dominant reactive species degradation. improved separation photogenerated charges verified electrochemical measurements. DFT calculations polarization BaTiO3 could affect electronic band structure BiOBr. This work will provide comprehensive insights mechanism at microcosmic level help develop new-styled photocatalysts.

Language: Английский

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Dissolved oxygen enhanced piezo-photocatalytic performance in Ag dots-modified BaTiO3 nanoparticles for efficient degradation of multiple organic pollutants

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 346, P. 127548 - 127548

Published: April 17, 2024

Language: Английский

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Achieving remarkable piezo-photocatalytic performances in Bi6Fe2Ti3O18/BiOCl S-scheme heterojunction through ferroelectric polarization effect

Applied Materials Today, Journal Year: 2024, Volume and Issue: 39, P. 102308 - 102308

Published: July 1, 2024

Language: Английский

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Piezocatalysis-combined advanced oxidation processes for organic pollutant degradation in water system

Ultrasonics Sonochemistry, Journal Year: 2025, Volume and Issue: 113, P. 107219 - 107219

Published: Jan. 5, 2025

Language: Английский

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Piezo-enhanced photocatalysis of MoS2/Bi4O5Br2/PVDF-HFP film for wastewater purification

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 997, P. 174938 - 174938

Published: May 21, 2024

Language: Английский

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Bi6Fe2Ti3O18 ferroelectrics with various morphologies under mild conditions by crystal growth control for promoted adsorption-piezo-photocatalytic degradation performances

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129293 - 129293

Published: Aug. 23, 2024

Language: Английский

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Synergetic piezo-photocatalytic effect in NaNbO3/WO3 photocatalyst for RhB degradation

Inorganic Chemistry Communications, Journal Year: 2023, Volume and Issue: 158, P. 111510 - 111510

Published: Sept. 28, 2023

Language: Английский

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Resonance of KNbO₃ nanofibers is effectively stimulated by ultrasound with low frequency and low power to enhance piezocatalytic activity

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(19), P. 11378 - 11389

Published: Jan. 1, 2024

Resonance-activated KNbO 3 nanofibers have significant strain-induced piezoelectric potential, facilitating the conversion of mechanical to chemical energy. The presence resonance-enhanced mechanism can reduce requirement for ultrasonic power input.

Language: Английский

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Rationally designed MIL-101(Fe)/WO3 S-scheme heterojunction coupled with peroxymonosulfate for boosting the visible-light-driven photodegradation of tetracycline hydrochloride

Applied Surface Science, Journal Year: 2024, Volume and Issue: 663, P. 160185 - 160185

Published: April 28, 2024

Language: Английский

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Hierarchical Ordered Mesoporous Sr₂Bi₄Ti₅O₁₈ Microflowers with Rich Oxygen Vacancies In Situ Assembled by Nanosheets for Piezo-Photocatalysis

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(46), P. 22101 - 22117

Published: Nov. 1, 2024

The Aurivillius phase layered perovskite ferroelectric material Sr2Bi4Ti5O18 (SBTO) exhibits spontaneous polarization and piezoelectric properties, which confer significant potential for piezo-photocatalysis. Its ability to enhance electron–hole separation while providing excellent fatigue resistance positions it as a promising candidate in this field. Defects were introduced improve the structural photoelectrochemical properties of SBTO. SBTO nanocrystals, featuring mixed structure hierarchically ordered mesoporous microflowers nanosheets, successfully synthesized via hydrothermal method. sample at lower temperature displayed optimal oxygen vacancy concentration exhibited superior piezoelectric-photo synergistic degradation activity organic pollutants. Additionally, corona increases macroscopic photocatalyst, promoting photogenerated carriers. Finite element simulations confirmed that single flower-like generates higher compared sheet-like morphology. In conclusion, integrating self-assembled hierarchical design, polarization, defect engineering forms an effective strategy achieving high-performance SBTO-based piezo-photocatalysts.

Language: Английский

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