Efficient photoelectrocatalytic simultaneous removal of antibiotic and Cr(VI) upon novel ternary plasma Ag/AgVO3@3D TiO2: Insight into the synergistic mechanism of redox

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Chemosphere Pub Date : 2025-03-16 DOI:10.1016/j.chemosphere.2025.144312

Yuqing Gao , Yuzhou Jin , Yu Hu , Mingfang Li , Xuejiang Wang , Haiying Ma , Ya-nan Zhang

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Abstract

Composite pollution such as antibiotics and hexavalent chromium (Cr(VI)), has become a great challenge in wastewater treatment due to its severe toxicity. Herein, an advanced photoelectrocatalytic (PEC) system is constructed based on Ag/AgVO₃@3D TiO₂ photoelectrode to synchronously remove ofloxacin (OFL) and Cr(VI). The superior PEC performance of photoelectrode performance is attributed to the synergistic effect of heterojunction structure and the surface plasmon resonance (SPR) effect, characterized by COMSOL finite element simulation. Nearly 100 % removal of both OFL (k = 0.292 min⁻¹) and Cr(VI) (k = 0.267 M⁻¹ min⁻¹) are achieved in 40 min. The promotion effect of anodic oxidation rate on cathodic reduction efficiency is studied by comparing the synchronous removal effect of other two co-existing pollutant systems (norfloxacin (NOR)-Cr(VI) and tetracycline (TC)-Cr(VI)). Main active species and intermediates are analyzed by EPR, Fukui index (f^- and f⁺) and Methyl Phenyl Sulfoxide (PMSO) probing experiment. The stability and various influence factors are studied for practical application.

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抗生素和六价铬（Cr(VI)）等复合污染因其剧毒性而成为废水处理中的一大难题。本文基于Ag/AgVO3@3D TiO2光电极构建了一种先进的光电催化（PEC）系统，可同步去除氧氟沙星（OFL）和六价铬（Cr(VI)）。光电极的卓越 PEC 性能归因于异质结结构和表面等离子体共振 (SPR) 效应的协同效应。在 40 分钟内，OFL（k = 0.292 min-1）和六价铬（k = 0.267 M-1 min-1）的去除率接近 100%。通过比较其他两种共存污染物体系（诺氟沙星 (NOR)-Cr(VI) 和四环素 (TC)-Cr(VI)）的同步去除效果，研究了阳极氧化速率对阴极还原效率的促进作用。通过 EPR、福井指数（f- 和 f+）和甲基苯基亚砜（PMSO）探测实验分析了主要活性物种和中间产物。还研究了其稳定性和各种影响因素，以利于实际应用。

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来源期刊

Chemosphere 环境科学-环境科学

CiteScore

15.80

自引率

8.00%

发文量

4975

审稿时长

3.4 months

期刊介绍： Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.