Oxygen Vacancy-Mediated Microflower-like Bi₅O₇I for Reactive Oxygen Species Generation through Piezo-Photocoupling Effect

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Photocatalytic reactive oxygen species (ROS) evolution with Bi5O7I still suffers from sluggish charge carrier dynamics and limited light absorption. Herein, abundant vacancies (OVs) were introduced into the microflower-like Bi5O7I, its ROS generation toward organic dye degradation under synergistic effect of visible ultrasound irradiation was investigated. Benefiting broadened visible-light absorption range, stronger piezoresponse, higher transport efficiency in OV-enriched (2-PEG-Bi5O7I), both photocatalytic piezocatalytic degradations improved. More importantly, piezo-photocatalytic performance greater than sum corresponding photocatalysis piezocatalysis, indicating a strong coupling effect. In addition, yield •O2– 2-PEG-Bi5O7I 1.5 times that it also 4.3 3.1 single respectively. Interestingly, no noticeable •OH detected case irradiation, while yields 3.6 5.3 μmol g–1 h–1, respectively, surpassing pristine as well. This work advances between piezocatalysis new strategy for efficient discloses positive role improving multiresponsive catalysis.

Язык: Английский

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S‐Scheme Heterojunction Engineering of CdS/Bi₂WO₆ in Breakthrough Piezocatalytic Nitrogen Reduction and Hydrogen Evolution: Performance, Mechanism, and DFT Calculations

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 5, 2024

Abstract Herein, a novel bismuth tungstate and cadmium sulfide (CdS/Bi 2 WO 6 ）step‐scheme (S‐scheme) heterojunction piezocatalyst for the first time is developed. The exceptional piezocatalytic nitrogen reduction reaction activity (1.37 mmol L −1 g h ) delivered, which significantly higher compared to pure CdS (0.06 bare Bi (0.45 ), showing an almost 23‐fold 3‐fold increase, respectively. This performance greatly exceeds previously reported piezocatalysts piezo‐photocatalysts. Meanwhile, this catalyst also holds outstanding hydrogen evolution rate of 1.02 . Relevant experimental density functional theory (DFT) calculations results demonstrate that excellent catalytic capacity CdS/Bi mainly ascribed construction S‐scheme heterojunction, promotes piezoelectric performance, enhances segregating efficiency charge carriers redox capacity, regulates electronic structure, optimizes dynamics processes reduces reactions barrier, induces more active sites. Furthermore, new mechanism proposed. research extends applications heterojunctions in sustainable energy piezocatalysis offers insights designing efficient systems.

Язык: Английский

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Rapid charge transfer and enhanced internal electric field in core-shell Schottky junction for photocatalyzed Fenton reaction: Performance and mechanism

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 690, С. 137192 - 137192

Опубликована: Март 10, 2025

Язык: Английский

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Oxygen Vacancy Engineering of Bi₄Ti₃O₁₂ Piezocatalyst Driving In Situ H₂O₂ Evolution for Self-Cycled Fenton-Like Degradation of Pollutants

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

In this work, we synthesized a Bi4Ti3O12 piezocatalyst with surface oxygen vacancy (BTO-Ov) to facilitate in situ hydrogen peroxide (H2O2) production and establish piezocatalytic self-cycled Fenton-like system for degradation of pollutants. Notably, the H2O2 evolution rate from BTO-Ov catalyst reaches 558.8 μmol g–1 h–1 when utilizing pure water, significantly exceeding obtained BTO (274.6 h–1). Furthermore, can be enhanced 1091.6 addition ethanol as sacrificial agent endows robust stability. (BTO-Ov/Fe0), efficiency methyl orange (MO) dye pollutant achieve 91.9% within 20 min, coupled high kinetic coefficient 0.117 min–1, indicating excellent catalytic activity. Relevant characterization results reveal that introduction improves piezoelectricity, reduces band gap BTO, enhances charge carrier transfer separation, facilitates dual-channel reaction mechanism, thereby achieving superior performance. This work not only synthesis valuable chemicals but also offers cost-effective sustainable approach wastewater purification.

Язык: Английский

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High-performance piezocatalytic hydrogen evolution over bismuth oxyhalides with halogen-dependent piezoelectricity and surface activity

Rare Metals, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Язык: Английский

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In-situ formation of SrCO3 microcrystals-decorated Fe3O4 nanosheets as an efficient and long-lasting catalyst for overall water splitting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162842 - 162842

Опубликована: Апрель 1, 2025

Язык: Английский

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