Electrochemical bio-sensor of caffeine in food beverages on using silver vanadium oxide decorated in graphitic carbon nitride (AgVO@g-CN) Nano composite modified glassy carbon electrode

IF 5.4 Q1 CHEMISTRY, ANALYTICAL Sensing and Bio-Sensing Research Pub Date : 2024-02-01 DOI:10.1016/j.sbsr.2024.100637

V. Vinothkumar , A. Poongan , Abhishek Mandal , P. Venkatesh

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Abstract

The silver vanadate AgVO@g-CN was synthesized by the Co-precipitation method for the first time. The electrocatalytic potential of the AgVO@g-CN nanocomposite is investigated using cyclic voltammetry and differential pulse voltammetry to detect caffeine (CAF). The linear relationship between peak current and CAF concentration has been determined to be in the 6.5 to 255 μM wide linear range, with a lower detection limit of 0.038 μM. The sensitivity of produced electrode was 5.87 μAμM⁻¹ cm⁻¹. The successful application of the modified AgVO@g-CN nanocomposite electrode for CAF detection demonstrates operational stability, and the novel technique displayed good repeatability and reproducibility. Caffeine levels in commercial coffee, Red Bull, and Coca-Cola were successfully determined using the proposed sensor. The results obtained clearly show the capability of sensing and possible application of AgVO@g-CN nanocomposite for real-time electrochemical detection of CAF.

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使用氮化石墨碳中装饰的氧化银钒（AgVO@g-CN）纳米复合改性玻璃碳电极对食品饮料中的咖啡因进行电化学生物传感器分析

首次采用共沉淀法合成了钒酸银 AgVO@g-CN。利用循环伏安法和差分脉冲伏安法研究了 AgVO@g-CN 纳米复合材料的电催化电位，以检测咖啡因（CAF）。峰值电流与 CAF 浓度之间的线性关系被确定为在 6.5 至 255 μM 宽线性范围内，检测下限为 0.038 μM。所制电极的灵敏度为 5.87 μAμM cm。改性 AgVO@g-CN 纳米复合电极在 CAF 检测中的成功应用证明了其操作的稳定性，并且该新型技术具有良好的重复性和再现性。使用所提出的传感器成功测定了商用咖啡、红牛和可口可乐中的咖啡因含量。所获得的结果清楚地表明了 AgVO@g-CN 纳米复合材料在实时电化学检测 CAF 方面的传感能力和可能的应用。

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来源期刊

Sensing and Bio-Sensing Research Engineering-Electrical and Electronic Engineering

CiteScore

10.70

自引率

3.80%

发文量

审稿时长

87 days

期刊介绍： Sensing and Bio-Sensing Research is an open access journal dedicated to the research, design, development, and application of bio-sensing and sensing technologies. The editors will accept research papers, reviews, field trials, and validation studies that are of significant relevance. These submissions should describe new concepts, enhance understanding of the field, or offer insights into the practical application, manufacturing, and commercialization of bio-sensing and sensing technologies. The journal covers a wide range of topics, including sensing principles and mechanisms, new materials development for transducers and recognition components, fabrication technology, and various types of sensors such as optical, electrochemical, mass-sensitive, gas, biosensors, and more. It also includes environmental, process control, and biomedical applications, signal processing, chemometrics, optoelectronic, mechanical, thermal, and magnetic sensors, as well as interface electronics. Additionally, it covers sensor systems and applications, µTAS (Micro Total Analysis Systems), development of solid-state devices for transducing physical signals, and analytical devices incorporating biological materials.