基于多功能Co3O4@Ag NFs光催化信号放大的比色/SERS双通道传感器用于食品中双乙酰的超灵敏检测

IF 8.2 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry: X Pub Date : 2025-09-11 DOI:10.1016/j.fochx.2025.103002

Xiaoyu Yang, Dan Zhou, Xin Yang, Bo Wu, Jiaxin Xie, Runzi Zhang, Yao Liu, Yi He

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引用次数: 0

摘要

双乙酰是一种常用的增强食品香气的调味剂。然而，过量会对健康构成威胁，因此快速和灵敏的检测对食品安全至关重要。在本研究中，合成了多功能氧化钴tetraoxide@silver纳米花（Co3O4@Ag NFs）来增强双乙酰基的光催化显色，从而实现了一种简单且高灵敏度的比色/SERS双通道传感器。Co3O4@Ag NFs具有三个关键功能：首先，Co3O4作为光催化剂，提高催化效率和检测灵敏度。其次，Ag纳米粒子增强了光的散射和反射，延长了光与双乙酰分子的相互作用，加速了反应。第三，Co3O4@Ag NFs产生的强电磁场产生众多热点，使其成为一种有效的高灵敏度SERS基板。该传感器比色检测限为10 × 10−6 mol/L， SERS检测限为3.0 × 10−12 mol/L，为二乙酰基检测提供了一种简单、快速、灵敏、准确的方法，为未来的食品安全分析提供了潜力。

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A colorimetric/SERS dual-channel sensor based on multifunctional Co3O4@Ag NFs with photocatalytic signal amplification for ultrasensitive detection of diacetyl in food

Diacetyl is a flavoring agent commonly used to enhance food aroma. However, excessive levels can pose health risks, making rapid and sensitive detection crucial for food safety. In this study, multifunctional cobalt oxide tetraoxide@silver nanoflowers (Co₃O₄@Ag NFs) were synthesized to enhance the photocatalytic coloration of diacetyl, enabling a simple and highly sensitive colorimetric/SERS dual-channel sensor. Co₃O₄@Ag NFs serve three key functions: First, Co₃O₄ acts as a photocatalyst, improving catalytic efficiency and detection sensitivity. Second, Ag nanoparticles enhance light scattering and reflection, prolonging light interaction with diacetyl molecules and accelerating the reaction. Third, the strong electromagnetic field generated by Co₃O₄@Ag NFs creates numerous hotspots, making it an effective and highly sensitive SERS substrate. The sensor achieves detection limits of 10 × 10⁻⁶ mol/L for colorimetric detection and 3.0 × 10⁻¹² mol/L for SERS, providing a simple, rapid, sensitive, and accurate way for diacetyl detection and offering potential for future food safety analysis.

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来源期刊

Food Chemistry: X CHEMISTRY, APPLIED-

CiteScore

4.90

自引率

6.60%

发文量

315

审稿时长

55 days

期刊介绍： Food Chemistry: X, one of three Open Access companion journals to Food Chemistry, follows the same aims, scope, and peer-review process. It focuses on papers advancing food and biochemistry or analytical methods, prioritizing research novelty. Manuscript evaluation considers novelty, scientific rigor, field advancement, and reader interest. Excluded are studies on food molecular sciences or disease cure/prevention. Topics include food component chemistry, bioactives, processing effects, additives, contaminants, and analytical methods. The journal welcome Analytical Papers addressing food microbiology, sensory aspects, and more, emphasizing new methods with robust validation and applicability to diverse foods or regions.