This study reports the fabrication of a CdO-CdS hybrid nanocomposite (CDCS NC) and its application towards electrochemical sensing of dopamine (DA). The synthesis was conducted at various temperatures using leaf powder as a green fuel and it was noticed in the XRD pattern that 400 °C was ideal for the formation of the CdO-CdS hybrid NC. Also, the samples were characterized by implementing Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), UV-Vis Diffused Reflectance Spectroscopy (UV-DRS) and Photoluminescence (PL) techniques. The electrochemical activity was investigated using Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) techniques. A working electrode was fabricated by modifying a Glassy Carbon Electrode (GCE) using the CdO-CdS NC and it showed remarkable electrochemical activity towards dopamine (DA). Further, the electrochemical properties were investigated by varying the scan rate, pH and concentration. The fabricated electrode shows a low limit of detection of 23 µM. Hence by its unique composition and inherent properties, the NC stands as a potent tool for advancing the boundaries of electrochemical sensing, heralding a new era of innovation in sensor development.

中文翻译：

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CdO-CdS杂化纳米复合材料的简便绿色一步合成：其电化学和光致发光应用

本研究报告了 CdO-CdS 混合纳米复合材料 (CDCS NC) 的制造及其在多巴胺 (DA) 电化学传感中的应用。使用叶粉作为绿色燃料在不同温度下进行合成，从 XRD 图谱中可以看出，400 °C 是形成 CdO-CdS 杂化 NC 的理想温度。此外，还通过扫描电子显微镜 (SEM)、能量色散 X 射线分析 (EDX)、紫外-可见漫反射光谱 (UV-DRS) 和光致发光 (PL) 技术对样品进行了表征。使用循环伏安法（CV）和微分脉冲伏安法（DPV）技术研究电化学活性。使用 CdO-CdS NC 修饰玻碳电极 (GCE) 制备工作电极，它对多巴胺 (DA) 显示出显着的电化学活性。此外，通过改变扫描速率、pH 值和浓度来研究电化学性质。制作的电极显示出 23 µM 的检测下限。因此，凭借其独特的成分和固有特性，NC 成为突破电化学传感界限的有力工具，预示着传感器开发创新的新时代。