This work describes the synthesis, characterization, and application of a new ternary rGO-AuNPs-Cdots nanocomposite, which was extensively characterized by high-resolution electron microscopy (HR-TEM), UV-Vis spectroscopy, Raman spectroscopy, atomic force microscopy (AFM), X-ray diffraction (XRD), and electrochemical techniques. The nanocomposite was used to modify the surface of the glassy carbon electrode aiming to develop an electrochemical sensor for simultaneous determination of phenolic isomers. Electrochemical studies were performed in acetate buffer, pH 5.5. The modified rGO-AuNPs-Cdots electrode showed good electrocatalytic response for simultaneous determination of hydroquinone and catechol in the presence of resorcinol with detection limit of 1.2 × 10⁻⁸ mol L⁻¹ and 9.6 × 10⁻⁸ mol L⁻¹, respectively. This electrode also showed good electrocatalytic response for simultaneous determination of hydroquinone and catechol in real samples in the presence of other interferents.

这项工作描述了一种新型三元rGO-AuNPs-Cdots纳米复合材料的合成，表征和应用，该复合材料具有高分辨率电子显微镜（HR-TEM），UV-Vis光谱，拉曼光谱，原子力显微镜（AFM）的广泛特征。 ），X射线衍射（XRD）和电化学技术。纳米复合材料用于修饰玻碳电极的表面，旨在开发一种用于同时测定酚类异构体的电化学传感器。在pH 5.5的醋酸盐缓冲液中进行电化学研究。修饰的rGO-AuNPs-Cdots电极在间苯二酚存在下对苯二酚和邻苯二酚的同时测定具有良好的电催化响应，检出限为1.2×10 ^-8  mol L ^-1和9.6×10^-8  mol L ^-1。该电极还显示出良好的电催化响应，可在存在其他干扰物的情况下同时测定实际样品中的对苯二酚和邻苯二酚。