Kumar Deepak, Bano Daraksha, Chandra Subhash, Kumar Bharat, Kumar Vivek, Yadav Pradeep Kumar, Hasan Syed Hadi
Department of Chemistry, Nano-Materials Laboratory, IIT BHU, Varanasi, 221005, Uttar Pradesh, India.
Department of Chemistry, Chhadami Lal Jain P.G. College, Firozabad, Uttar Pradesh, 283203, India.
Anal Sci. 2025 May 8. doi: 10.1007/s44211-025-00787-9.
The Pd-MnO nanoparticles attached to carbon quantum dots nanocomposite were synthesized using the green synthesis and hydrothermal process. Characterization of the as-prepared nanocomposite was intensively performed by FT-IR, powder XRD, XPS, and HR-TEM analysis. The synthesized nanomaterial was further examined for its selective and sensitive ascorbic acid (ASA) sensing using a Pd-MnO@CQD modified glassy carbon electrode (GCE). The Pd-MnO@CQD nanocomposite exhibits a distinct and improved peak current of ASA when compared to electrodes treated with Pd-MnO and bare GCE. The designed sensor has excellent performance, with a linear range of 10-1500 μM, a low detection limit of 0.14 μM (S/N = 3), a high sensitivity of 1.9671 μAµM cm. Furthermore, the constructed sensor demonstrates good sensitivity for detecting ASA in a variety of real samples.
采用绿色合成法和水热法合成了附着在碳量子点上的钯-二氧化锰纳米颗粒复合材料。通过傅里叶变换红外光谱（FT-IR）、粉末X射线衍射（XRD）、X射线光电子能谱（XPS）和高分辨透射电子显微镜（HR-TEM）分析对所制备的纳米复合材料进行了深入表征。使用钯-二氧化锰@碳量子点修饰的玻碳电极（GCE）进一步检测了合成的纳米材料对选择性和灵敏性抗坏血酸（ASA）的传感性能。与用钯-二氧化锰处理的电极和裸玻碳电极相比，钯-二氧化锰@碳量子点纳米复合材料表现出明显且增强的抗坏血酸峰值电流。所设计的传感器具有优异的性能，线性范围为10-1500 μM，低检测限为0.14 μM（信噪比S/N = 3），高灵敏度为1.9671 μAµM cm。此外，构建的传感器对多种实际样品中的抗坏血酸检测显示出良好的灵敏度。
