Simultaneous water sterilization and photocatalytic degradation by full-spectrum responsive Zn3In2S6/WO3−x S-scheme heterojunction: Mechanism insight and toxicity assessment

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL Chemical Engineering Science Pub Date : 2025-04-11 DOI:10.1016/j.ces.2025.121651

Xiaofeng Liu , Zhenbang Meng , Weirui Chen , Rui Huang , Qiaoshan Chen , Qi He , Ri Chen , Lihua Zhou , Wenxia Wang

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Abstract

It is crucial to develop highly efficient full-spectrum-responsive S-scheme heterojunctions for wastewater purification. Herein, an innovative Zn₃In₂S₆/WO₃₋_x heterojunction was synthesized, featuring full-spectrum responsiveness. It achieved 100 % inactivation of methicillin-resistant Staphylococcus aureus (MRSA) in 45 min and 90.34 % photocatalytic degradation of tetracycline (TC) in 120 min. Its effectiveness was mainly due to rapid charge separation via the S-scheme electron transfer pathway and near-infrared light absorption from the Localized Surface Plasmon Resonance (LSPR) effect of WO_3−x. Importantly, it showed robust photocatalytic capacity under diverse conditions. Quenching experiments and EPR analysis confirmed that ·OH and ·O₂⁻ played essential roles in photocatalytic degradation. Intermediate products were identified using LC-MS, 3D EEMs, and TOC, revealing the degradation pathway. Quantitative structure–activity relationship (QSAR) analysis suggested reduced ecotoxicity of pollutants. A potential mechanism for enhanced sterilization and photocatalytic degradation was proposed. This study provides a theoretical and experimental basis for designing novel heterojunctions for solar-assisted water purification.

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全谱响应Zn3In2S6/WO3−x S-scheme异质结同时光催化降解水：机理洞察和毒性评估

开发用于废水净化的高效全谱响应 S 型异质结至关重要。本文合成了一种创新的 Zn3In2S6/WO3-x 异质结，具有全谱响应性。它在 45 分钟内实现了对耐甲氧西林金黄色葡萄球菌（MRSA）100% 的灭活，在 120 分钟内实现了对四环素（TC）90.34% 的光催化降解。其有效性主要归功于通过 S 型电子传递途径实现的快速电荷分离以及 WO3-x 的局部表面等离子体共振（LSPR）效应产生的近红外光吸收。重要的是，它在各种条件下都表现出强大的光催化能力。淬灭实验和 EPR 分析证实，-OH 和 -O2- 在光催化降解过程中发挥了重要作用。利用 LC-MS、3D EMMs 和 TOC 对中间产物进行了鉴定，从而揭示了降解途径。定量结构-活性关系（QSAR）分析表明，污染物的生态毒性有所降低。提出了增强杀菌和光催化降解的潜在机制。这项研究为设计用于太阳能辅助水净化的新型异质结提供了理论和实验基础。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.