Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Plant Sciences and Medicinal Plants, Meshgin-shahr Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran.
Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Chemical Engineering, Istanbul Technical University, 34469 Istanbul, Turkey.
Food Chem. 2024 Dec 15;461:140762. doi: 10.1016/j.foodchem.2024.140762. Epub 2024 Aug 5.
In the present paper, carbon cloth (CC) as a flexible substrate was modified by molybdenum carbide nanospheres (MoC NSs @CC) by the drop-coating method to develop a sensitive electrochemical platform for detecting caffeic acid. The uniform MoC NSs were prepared via an easy route followed by pyrolyzing the precursor of the Mo-polydopamine (Mo-PDA) NSs. The MoC NSs were characterized and analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy/energy dispersive X-ray spectroscopy (FE-SEM/EDS), Raman spectroscopy (RS), and electrochemical methods. CC not only gave a flexible feature to the sensor but also provided a larger surface area for MoC NSs. Meanwhile, the excellent conductivity and large electroactive specific surface area of MoC NSs exhibited excellent electrocatalytic performance for caffeic acid determination. The developed sensor showed high sensitivity and selectivity, good reproducibility, and long-term stability with a limit of detection (LOD) and a wide linear range of 0.001 μM (S/N = 3) and 0.01-50 μM, respectively. In addition, the MoC NSs @CC sensor showed a promising application prospect for the detection of caffeic acid in green and black tea samples, indicating its importance in food safety and the food industry.
在本论文中，采用滴涂法将碳化钼纳米球（MoC NSs@CC）修饰在碳布（CC）上，开发了一种用于检测咖啡酸的灵敏电化学平台。通过一种简单的路线制备了均匀的 MoC NSs，然后对 Mo-聚多巴胺（Mo-PDA）NSs 的前体进行热解。通过 X 射线衍射（XRD）、场发射扫描电子显微镜/能量色散 X 射线能谱（FE-SEM/EDS）、拉曼光谱（RS）和电化学方法对 MoC NSs 进行了表征和分析。CC 不仅赋予了传感器柔韧性，还为 MoC NSs 提供了更大的表面积。同时，MoC NSs 具有优异的导电性和大的电化学活性比表面积，对咖啡酸的测定表现出优异的电催化性能。所开发的传感器具有高灵敏度和选择性、良好的重现性和长期稳定性，检测限（LOD）和宽线性范围分别为 0.001 μM（S/N=3）和 0.01-50 μM。此外，MoC NSs@CC 传感器在绿茶和红茶样品中检测咖啡酸具有良好的应用前景，这表明其在食品安全和食品工业中具有重要意义。
