Abstract In this paper, nickel and silver nanoparticle decorated on reduced graphene oxide (Ni/Ag@rGO) nanocomposite was synthesized using Punica granatum (pomegranate) juice. The synthesized Ni/Ag@rGO nanocomposite was successfully characterized by XRD, FTIR, FESEM, EDX, and HRTEM techniques. The electrochemical impedance spectroscopy (EIS) study of the Ni/Ag@rGO has shown a lower electrode resistance (30.0 Ohm). The electrocatalytic activity study shows that the Ni/Ag@rGO electrode has a greater electroactive area (0.149 cm2) and roughness factor (0.379). The Ni/Ag@rGO was applied for detecting ascorbic acid (AA) electrochemically, which revealed the linear range, limit of detection (LOD) and sensitivity of 4.89–90.09 µM, 0.16 µM, and 23,381.8 µA cm−2 mM−1, respectively. From the interference study, Ni/Ag@rGO electrode was found to be selective towards the detection of AA. The Ni/Ag@rGO electrode has shown excellent stability upto 45 days.

中文翻译：

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石榴汁水热辅助绿色合成Ni/Ag@rGO纳米复合材料及抗坏血酸电化学检测

摘要 在本文中，使用石榴汁合成了装饰在还原氧化石墨烯（Ni/Ag@rGO）纳米复合材料上的镍和银纳米颗粒。合成的 Ni/Ag@rGO 纳米复合材料通过 XRD、FTIR、FESEM、EDX 和 HRTEM 技术成功表征。Ni/Ag@rGO 的电化学阻抗谱 (EIS) 研究显示出较低的电极电阻 (30.0 Ohm)。电催化活性研究表明，Ni/Ag@rGO 电极具有更大的电活性面积（0.149 cm2）和粗糙度因子（0.379）。Ni/Ag@rGO 用于电化学检测抗坏血酸 (AA)，显示线性范围、检测限 (LOD) 和灵敏度为 4.89–90.09 µM、0.16 µM 和 23,381.8 µA cm-2 mM-1，分别。从干扰研究来看，发现 Ni/Ag@rGO 电极对 AA 的检测具有选择性。Ni/Ag@rGO 电极显示出长达 45 天的出色稳定性。