Construction of CuO/BiVO4 S-scheme heterojunction with improved carrier separation for efficient piezo-photocatalytic degradation of tetracycline

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2024-11-05 DOI:10.1016/j.molliq.2024.126415

Haiyue Zhang , Haifeng Shi

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Abstract

This investigation aimed to enhance the efficacy of piezo-photocatalysts for the degradation of tetracycline by introducing an S-scheme heterojunction through the synthesis of CuO/BiVO₄ composites. Various ratios of these composites were precisely prepared through the oil bath precursor method. The optimal ratio, designated as CBVO-0.10, exhibited a notable enhancement, achieving a reaction rate constant (k) of 0.045 min⁻¹. This value represented a 1.4-fold increase compared to monolithic BiVO₄ under combined light and ultrasound irradiation. Charge transfer characterizations provided clarification regarding the S-scheme mechanism in the catalytic process. This piezo-photocatalytic activity enhancement was attributed to the S-scheme and the piezoelectric internal electric field. This work presented an effective strategy for the design of efficient heterojunction piezo-photocatalysts for water pollution degradation, highlighting a promising approach for advancing efficient piezo-photocatalysts, with substantial implications for environmental remediation, particularly in the context of pollutant abatement.

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构建具有更好载流子分离性能的 CuO/BiVO4 S 型异质结，实现四环素的高效压电光催化降解

这项研究旨在通过合成 CuO/BiVO4 复合材料，引入 S 型异质结，提高压电光催化剂降解四环素的功效。通过油浴前驱体法精确制备了这些复合材料的不同比例。最佳比例（CBVO-0.10）显著提高了反应速度，反应速率常数（k）达到 0.045 min-1。与光和超声联合照射下的整体 BiVO4 相比，该值提高了 1.4 倍。电荷转移表征澄清了催化过程中的 S 型机制。这种压电光催化活性的增强归因于 S 型和压电内电场。这项工作提出了设计高效异质结压电光催化剂用于水污染降解的有效策略，突出了推进高效压电光催化剂的一种前景广阔的方法，对环境修复，尤其是污染物减排具有重大意义。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.