Streamlined Synthesis of Ga‐Cu Dual Single‐Atom Nanozymes for Advanced Electrochemical Sensing Applications

IF 19 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-06-16 DOI:10.1002/adfm.202510909

Guangchun Song, Xiaochun Zheng, Zedong Zhang, Marie‐Laure Fauconnier, Cheng Li, Li Chen, Dequan Zhang

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引用次数: 0

Abstract

The real‐time, rapid, and portable detection of food freshness is crucial for assessing food quality and ensuring food safety. Volatile amines produced during food spoilage have significant potential as markers for evaluating freshness. In this study, an electrochemical sensing platform is developed for the detection of volatile amines using gallium‐copper dual single‐atom nanozymes (with Ga and Cu contents of 1.31and 4.07 wt.%, respectively) supported by a 2D layered double hydroxide (LDH). The synergistic loading of the dual atoms facilitated binding with volatile amines, which accelerated electron transfer at the GaCu‐LDH surface, inducing changes in the electrical signals and enabling detection. The platform exhibited a rapid response time of ≈4 s, with a good linear relationship between the ammonia concentration and steady‐state current within the range of 0.05‒0.4 mm and a detection limit of 5.9 µm. This electrochemical sensor platform enabled the rapid, portable, and intelligent detection and monitoring of the freshness of meat from livestock and poultry (pork, beef, lamb, and chicken) at room temperature and under refrigerated storage conditions, providing a valuable method for the real‐time monitoring of food freshness.

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用于先进电化学传感应用的Ga - Cu双单原子纳米酶的流线型合成

实时、快速、便携的食品新鲜度检测对于评估食品质量和确保食品安全至关重要。在食品变质过程中产生的挥发性胺作为评价新鲜度的标志具有重要的潜力。在这项研究中，利用二维层状双氢氧化物（LDH）支撑的镓铜双单原子纳米酶（Ga和Cu含量分别为1.31%和4.07 wt.%），开发了一种电化学传感平台，用于检测挥发性胺。双原子的协同负载促进了与挥发性胺的结合，从而加速了GaCu - LDH表面的电子转移，诱导了电信号的变化并使检测成为可能。该平台快速响应时间约为4 s，氨浓度与稳态电流在0.05 ~ 0.4 mm范围内呈良好的线性关系，检出限为5.9µm。该电化学传感器平台能够在室温和冷藏条件下快速、便携、智能地检测和监测畜禽肉（猪肉、牛肉、羊肉和鸡肉）的新鲜度，为实时监测食品新鲜度提供了一种有价值的方法。

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.