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首页> 外文期刊>International Journal of Electrochemical Science >Voltammetric Determination of Caffeic Acid Using Co3O4 Microballs Modified Screen Printed Carbon Electrode
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Voltammetric Determination of Caffeic Acid Using Co3O4 Microballs Modified Screen Printed Carbon Electrode

机译：Co 3 O 4 微球修饰丝网印刷碳电极伏安法测定咖啡酸

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摘要

Herein, we report a novel electrochemical sensor for the determination of caffeic acid based on the cobalt oxide microballs modified screen printed electrode. The cobalt oxide microballs is synthesized through a facile sonochemical strategy. Furthermore, as-synthesized Co3O4 microballs were systematically characterized by X-ray diffraction method (XRD), Fourier transformer infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The electrocatalytic activity of Co3O4 microballs modified electrode evaluated by the determination of caffeic acid using cyclic voltammetry (CV). Differential pulse voltammetry (DPV) was used to derive the analytical curve. The proposed sensor exhibited superior electrocatalytic activity towards caffeic acid determination in terms of decent sensitivity, a broad dynamic range with a lower limit of detection 48 nM. In addition, the proposed sensor offers good selectivity, good reproducibility, and decent stability. Moreover, the real sample analysis were carried out in wine samples and obtained an acceptable recovery rate.
机译：在这里，我们报告了一种新型的电化学传感器，用于基于氧化钴微球修饰的丝网印刷电极测定咖啡酸。氧化钴微球是通过简便的声化学策略合成的。此外，通过X射线衍射法（XRD），傅立叶变压器红外光谱（FT-IR）和扫描电子显微镜（SEM）对合成的Co3O4微球进行了系统表征。通过使用循环伏安法（CV）测定咖啡酸来评估Co3O4微球修饰电极的电催化活性。使用差分脉冲伏安法（DPV）得出分析曲线。拟议的传感器在体面灵敏度，宽动态范围，检测下限48 nM方面显示出对咖啡酸测定的优异电催化活性。另外，提出的传感器提供了良好的选择性，良好的重现性和良好的稳定性。此外，对葡萄酒样品进行了真实样品分析，并获得了可接受的回收率。

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