Magnetic optimizing surface-enhanced Raman scattering (SERS) strategy of detection and in-situ monitoring of photodegradation of Benzo[a]pyrene in water

IF 5.7 2区化学 Q1 CHEMISTRY, ANALYTICAL

Analytica Chimica Acta Pub Date : 2024-11-22 DOI:10.1016/j.aca.2024.343466

Qinyi Li, Qiangting Zheng, Jiangli Shi, Yu Yan, Xiaoyu Guo, Haifeng Yang

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引用次数: 0

Abstract

Background

Polycyclic aromatic hydrocarbons (PAHs) are one of the most dangerous persistent organic pollutants in the environment. Due to the discharge of chemical plants and domestic water, the existence of PAHs in sea water and lake water is harmful to human health. A method for rapid detection and removal of PAHs in water needs to be developed.

Results

In this work, we fabricate Fe₃O₄ wrapped with gold nanoparticles decorated graphene oxide composite nanomaterial (Fe₃O₄/GO/Au). Excellent magnetism of Fe₃O₄ provides a means to enrich and separate the PAHs from substrates, which effectively improve the selectivity and avoid the coffee ring effect in traditional SERS detection. Fe₃O₄/GO/Au shows great response to PAHs owing to the π-π electronic interaction between PAHs and GO, and through the calculation of Material Studio, it is confirmed that GO has different adsorption capacity for polycyclic aromatic hydrocarbons with different number of benzene rings. The limit of detection (LOD) of Benzo[a]pyrene (BaP) can reach 3.8 μg⋅L⁻¹ and other PAHs can also be detected at μg⋅L⁻¹ level. Gold nanoparticles demonstrate prominent light absorption within the visible spectrum and are characterized by their localized surface plasmon resonance (LSPR) properties. Meanwhile, Au NPs facilitate electron migration and carrier separation of GO. Owing to the synergistic interplay, the composite system Fe₃O₄/GO/Au exhibits the capability for SERS sensitive detection and photocatalytic degradation of BaP under visible light irradiation, realizing in-situ monitor the photodegradation of BaP in water.

Significance and novelty

A rapid and accurate quantitative method is established for the detection and removal of PAHs in water, which is intended to provide new strategy for the quantitative analysis and removal of water environmental pollution.

Abstract Image

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磁性优化表面增强拉曼散射 (SERS) 检测和原位监测水中苯并[a]芘光降解的策略

背景多环芳烃（PAHs）是环境中最危险的持久性有机污染物之一。由于化工厂和生活用水的排放，海水和湖水中多环芳烃的存在对人类健康有害。结果在这项工作中，我们制备了Fe3O4包裹金纳米粒子装饰氧化石墨烯的复合纳米材料（Fe3O4/GO/Au）。Fe3O4 的优异磁性为多环芳烃从基底中富集和分离提供了手段，有效提高了选择性，避免了传统 SERS 检测中的咖啡环效应。Fe3O4/GO/Au 由于多环芳烃与 GO 之间的 π-π 电子相互作用而对多环芳烃有很好的响应，并且通过 Material Studio 的计算证实，GO 对不同苯环数的多环芳烃有不同的吸附能力。苯并[a]芘（BaP）的检测限（LOD）可达 3.8 μg-L-1，其他多环芳烃的检测限也可达到 μg-L-1。金纳米粒子在可见光谱范围内具有突出的光吸收特性，并具有局部表面等离子体共振（LSPR）特性。同时，金纳米粒子还能促进 GO 的电子迁移和载流子分离。由于二者的协同作用，Fe3O4/GO/Au 复合体系在可见光照射下具有 SERS 敏感检测和光催化降解 BaP 的能力，实现了对水中 BaP 光降解的原位监测。意义和新颖性建立了一种快速准确的定量检测和去除水中多环芳烃的方法，为定量分析和去除水环境污染提供了新策略。

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来源期刊

Analytica Chimica Acta 化学-分析化学

CiteScore

10.40

自引率

6.50%

发文量

1081

审稿时长

38 days

期刊介绍： Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.