Oxygen vacancy-mediated Bi2WO6/FeOOH heterojunction for efficient photo-Fenton degradation antibiotics and synergistic sterilization

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2024-11-14 DOI:10.1016/j.seppur.2024.130546

Qing Wang , Ruofei Zhao , Haoran Li , Shaojing Sun , Yan Sun , Weimin Gu , Na Wang , Xuli Li

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Abstract

Photo-Fenton as the advanced oxidation technology shows great potential in water purification, which is limited by the sluggish reaction kinetics. Herein, oxygen vacancy-mediated Bi₂WO₆/FeOOH (Vo-BWO/FeOOH) heterojunction has been successfully constructed and performs superior performance for degradation antibiotic wastewater and antibiotic resistant bacteria (ARB) inactivation. The optimal photo-Fenton degradation rate for TCH achieves 0.0833 min⁻¹ over oxygen vacancy-rich BWO/FeOOH (Vo-r-BWO/FeOOH). The degradation rate of tetracycline reached 100 % within 60 min, while the removal efficiency of E. coli resistant to tetracycline, ampicillin, and kanamycin was 94.1 % at 80 min. Moreover, Vo-r-BWO/FeOOH heterojunction also exhibits excellent durability, strong removal ability for multiple antibiotics and exceptional activity in a practical water environment. The comprehensive study of experiment and density functional theory (DFT) calculations confirms that the synergistic effect of oxygen vacancies accelerates the interfacial charge carriers’ migration and adsorption-activation of H₂O₂. Finally, the degradation pathway and toxicity of intermediates have been ascertained. This work provides a valuable strategy for the remediation of antibiotic wastewater resources.

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氧空位介导的 Bi2WO6/FeOOH 异质结用于高效光 Fenton 降解抗生素和协同杀菌

光-芬顿（Photo-Fenton）作为一种先进的氧化技术，在水净化领域显示出巨大的潜力，但却受到反应动力学缓慢的限制。本文成功构建了氧空位介导的 Bi2WO6/FeOOH（Vo-BWO/FeOOH）异质结，并在降解抗生素废水和灭活抗生素耐药菌（ARB）方面表现出色。在富氧空位的 BWO/FeOOH （Vo-r-BWO/FeOOH）上，TCH 的最佳光-芬顿降解率达到 0.0833 min-1。四环素的降解率在 60 分钟内达到 100%，而对四环素、氨苄西林和卡那霉素耐药的大肠杆菌的去除率在 80 分钟内达到 94.1%。此外，Vo-r-BWO/FeOOH 异质结还具有优异的耐久性，对多种抗生素具有很强的去除能力，并在实际水环境中具有优异的活性。实验和密度泛函理论（DFT）计算的综合研究证实，氧空位的协同效应加速了界面电荷载流子的迁移和 H2O2 的吸附活化。最后，还确定了中间产物的降解途径和毒性。这项研究为抗生素废水资源的修复提供了一种有价值的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.