Usage of Bi–O Channels and Internal Electric Field in Nanosheet/Hollow-Cube Heterojunction for Photocatalytic NO Purification

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Catalytic purification of nitrogen oxide (NOx) in the air environment is imperative due to increasingly strict emission regulations. The photocatalytic performance NOx removal often suffers from mobility carriers; therefore, encouraging separation and transfer photogenerated carriers by establishing an internal electric field (IEF) effective strategy. Herein, a simple reduction method successfully synthesized series nanosheet/hollow-cube BiOCl/ZnSn(OH)6 (BOC/ZSH) photocatalysts. Material characterization density-functional theory (DFT) calculations verified that established at BOC/ZSH interface can drive directional migration electrons further accelerate via formation Bi–O channels. maximum NO efficiency optimized catalyst (BOC-15/ZSH) was 53.99%, which 30.16 1.92 times higher than those pure ZSH BOC, respectively. Density functional revealed had abundant active sites for strengthening adsorption activation reactant molecules. Incorporated with situ DRIFTS, explored reaction pathways illustrated heterojunctions could diminish energy barrier oxidation assist nitrate (NO3–). This work lends insights into fabrication pathway analyses highly efficient photocatalysts pollution purification.

Language: Английский

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Recent advances in piezocatalytic hydrogen production and prospects

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 54, P. 105245 - 105245

Published: Oct. 9, 2024

Language: Английский

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Sn₃O₄ Nanoflowers/Mn_0.5Cd_0.5S Heterojunction as Piezo-photocatalyst for Hydrogen Evolution Reaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Piezo-photocatalysis has been considered as a promising strategy for hydrogen production through the piezoelectric effect. In this work, we synthesized series of Sn3O4/MnxCd1–xS (0 ≤ x 0.7) piezo-photocatalytic heterostructures evolution reaction. Mn0.5Cd0.5S (MCS) showed uppermost rate (5.57 mmol/g/h) among all MnxCd1–xS catalysts. When simultaneously subjected to ultrasonic treatment and irradiation, optimal Sn3O4/Mn0.5Cd0.5S (Sn3O4/MCS) composite catalyst exhibited H2 (21.46 (mmol/g)/h), which is enhanced by 3.85 times over that pure MCS. And fabricated catalysts possess favorable stability; after 4 cycles experiments, can still reach 19.39 mmol/g/h. The process, along with construction heterojunction, generated electric field, significantly enhancing separation migration carriers, boosted Sn3O4/MCS. This work offers method designing type-II heterojunction utilizing both mechanical solar energy efficient shows its potential green application.

Language: Английский

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Fabrication of the CdS-Cd₂Nb₂O₇ Nanocomposite Heterojunction with Cadmium Vacancy for Efficient Piezocatalytic H₂ Evolution

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(22), P. 26155 - 26163

Published: Nov. 5, 2024

Piezocatalytic hydrogen evolution represents a promising strategy for generating sustainable energy. The construction of heterojunctions can realize the efficient separation and migration charges thus achieve enhanced H2 performance. In this study, we report fabrication CdS-Cd2Nb2O7 (CdS-CNO) heterojunction piezocatalyst with cadmium vacancies aimed at improving Cadmium sulfide (CdS) was combined niobate (Cd2Nb2O7, CNO) to form through photodeposition strategy. By regulating time, CdS-CNO nanocomposites varying CdS contents were successfully obtained. introduced into CNO matrix during process, where ions within lattice reacted sulfur CdS, resulting in creation vacancies. Experimental results demonstrated that CdS-CNO-4 composite, an optimized content, exhibited highest piezoelectric production activity 6.01 mmol·g–1·h–1, which is much higher than those most previously reported piezocatalysts. performance attributed strong internal electric field generated by polarization charge carrier facilitated This study aims provide developing highly

Language: Английский

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Crystallinity-driven ferroelectric and piezoelectric properties of hydrothermally synthesized zinc stannate: exploring the substantial role of mineralizer NaOH

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 13(5), P. 2451 - 2458

Published: Dec. 10, 2024

Hydrothermally synthesized polycrystalline ZnSnO₃ at 0 M mineralizer changes to single-crystalline 0.25 M. At M, Sn⁴⁺ ions dominate, causing lossy ferroelectric behavior, while stabilizes Zn²⁺ ions, resulting ideal ferroelectricity.

Language: Английский

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