Abstract A highly sensitive hierarchical electrochemical sensing nanostructures have been successfully synthesized by hydrothermal and chemical deposition methods using Au nanoparticles (AuNPs)-functionalized Metal-organic frameworks (MOF) derived oxide nickel nanosheets (NiO NSs) on nickel foam (AuNPs@NiO NSs/NF). The morphological characterization of AuNPs@NiO NSs/NF nanomaterials was investigated by scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD) techniques. The electrochemical behaviors of AuNPs@NiO NSs/NF sensors were evaluated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and amperometric response (i-t). The measured results of AuNPs@NiO NSs/NF sensor shows good electrochemical properties, including high sensitivity of 17.80 μA·μM-1·cm-2, wide linear range from 0.2 to 300 μM, a low detection limit (LOD) (S/N=3) of 0.04 μM, limit of quantification (LOQ) of 0.13 μM and as well as great selectivity and long-time stability. Moreover, the electrochemical sensor has also been demonstrated excellent hydrazine properties in the real environmental samples. The excellent electrochemical performance of AuNPs@NiO NSs/NF sensor can be attributed to the hierarchical nanostructure of nickel-metal frameworks and synergistic catalysis effect of Au nanoparticles, which is promising as highly sensitive material for electrochemical sensor applications.

中文翻译：

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用于高灵敏度电化学肼检测的分层 Au 功能化衍生超薄 NiO 纳米片

摘要 在泡沫镍 (AuNPs@NiO NSs/) 上使用金纳米粒子 (AuNPs) 功能化金属有机骨架 (MOF) 衍生的氧化物镍纳米片 (NiO NSs)，通过水热和化学沉积方法成功合成了一种高灵敏度的分层电化学传感纳米结构。 NF)。通过扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDS) 和 X 射线衍射 (XRD) 技术研究了 AuNPs@NiO NSs/NF 纳米材料的形态表征。AuNPs@NiO NSs/NF 传感器的电化学行为通过循环伏安法 (CV)、电化学阻抗谱 (EIS) 和电流响应 (it) 进行评估。AuNPs@NiO NSs/NF 传感器的测量结果显示出良好的电化学性能，包括 17.80 μA·μM-1·cm-2 的高灵敏度，0.2 至 300 μM 的宽线性范围、0.04 μM 的低检测限 (LOD) (S/N=3)、0.13 μM 的定量限 (LOQ)，以及出色的选择性和长期稳定性。此外，电化学传感器在真实环境样品中也表现出优异的肼性能。AuNPs@NiO NSs/NF传感器优异的电化学性能可归因于镍金属骨架的分级纳米结构和Au纳米颗粒的协同催化作用，有望作为电化学传感器应用的高灵敏度材料。电化学传感器在真实环境样品中也表现出优异的肼特性。AuNPs@NiO NSs/NF 传感器优异的电化学性能可归因于镍金属骨架的分级纳米结构和 Au 纳米颗粒的协同催化作用，有望作为电化学传感器应用的高灵敏度材料。电化学传感器在真实环境样品中也表现出优异的肼特性。AuNPs@NiO NSs/NF 传感器优异的电化学性能可归因于镍金属骨架的分级纳米结构和 Au 纳米颗粒的协同催化作用，有望作为电化学传感器应用的高灵敏度材料。