Sterilization performance and mechanism evaluation of oxygen vacancies synergistic Fenton-like enhanced photocatalysts

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-02-05 DOI:10.1016/j.apcata.2024.120083

Yirui Zhao , Hongshun Hao , Jiaqi Zhong , Gongliang Zhang , Jingran Bi , Shuang Yan , Feng Hong , Hongman Hou

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引用次数: 0

Abstract

Foodborne pathogens have become one of the global problems threatening human life and health, and Fenton-like photocatalytic technology with nanomaterials as the core opens up a new way to eliminate pathogens. In this paper, m-WO_3-x was prepared by controlling oxygen vacancies and employing a hard template to construct a mesoporous structure, and the ternary composite N-Nb₂CT_x/TpPa-1/m-WO_3-x was successfully constructed by combining with N-Nb₂CT_x/TpPa-1. In comparison to the monomers, the ternary composite has a large specific surface area and pore volume, which enhances the light trapping ability, and greatly reduces the recombination of photogenerated electron-hole pairs. Simultaneously, the construction of oxygen vacancies can trigger the localized surface plasmon resonance effect, thereby broadening the spectral response range and enhancing the photothermal effect. The photocatalytic sterilization efficiency of oxygen vacancies synergistic Fenton-like was the highest when 2 mM of H₂O₂ was added, and the cell concentration decreased from 7.14 to 3.26 log₁₀CFU/mL. The establishment of N-Nb₂CT_x/TpPa-1/m-WO_3-x Fenton-like photocatalysts will provide a theoretical basis for reducing the spread of foodborne pathogens.

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氧空位增强型fenton光催化剂的杀菌性能及机理评价

食源性致病菌已成为威胁人类生命和健康的全球性问题之一，以纳米材料为核心的类芬顿光催化技术开辟了消除致病菌的新途径。本文通过控制氧空位，采用硬模板构建介孔结构制备m-WO3-x，并与N-Nb2CTx/ tpa -1结合成功构建了三元复合材料N-Nb2CTx/ tpa -1/m-WO3-x。与单体相比，三元复合材料具有较大的比表面积和孔体积，增强了光捕获能力，并大大减少了光生电子-空穴对的复合。同时，氧空位的构建可以触发局域表面等离子体共振效应，从而拓宽了光谱响应范围，增强了光热效应。当H2O2浓度为2 mM时，氧空位协同类fenton光催化杀菌效率最高，细胞浓度从7.14降低到3.26 log10CFU/mL。N-Nb2CTx/TpPa-1/m-WO3-x芬顿样光催化剂的建立将为减少食源性病原体的传播提供理论依据。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.