Laboratorio di Chimica Fisica Applicata, Dipartimento di Ingegneria dell'Innovazione Industriale e Digitale-Ingegneria Chimica Gestionale Informatica Meccanica, Università degli Studi di Palermo, Palermo, 90128, Italy.
J Nanosci Nanotechnol. 2019 Jun 1;19(6):3459-3470. doi: 10.1166/jnn.2019.16110.
In this work, we present some results concerning the electrochemical behavior of nanostructured-based electrochemical sensors. In particular, the attention has been focused on Pd and Cu nanowires for detection of hydrogen peroxide and NiO thin film or Ni@NiO core-shell nanowires for detection of mercury ions. Ordered array of Pd and Cu nanowires was obtained through displacement deposition reaction in a commercial polycarbonate membrane acting as a template. The method leads to stable nanostructured electrodes of Pd and Cu with high surface area. For the detection of mercury ions, we have fabricated a Ni/NiO electrochemical sensor, obtained by mild thermal oxidation of Ni-foil. Some results on Ni@NiO core-shell nanowires were also reported. The effect of oxidation time and temperature was studied in order to compare performances of the Ni@NiO nanowire array with those of NiO thin film. All samples were characterized by XRD, SEM and EDS analysis. Electrochemical tests have been conducted in order to characterize specific electrode performance such as sensibility, selectivity, and accuracy. Highly satisfying results have been obtained.
在这项工作中，我们介绍了一些有关基于纳米结构的电化学传感器的电化学行为的结果。特别是，我们关注了钯和铜纳米线用于检测过氧化氢，以及镍氧化物薄膜或镍@氧化镍核壳纳米线用于检测汞离子。通过在商用聚碳酸酯膜（用作模板）中的置换沉积反应，获得了有序排列的钯和铜纳米线。该方法得到了具有高表面积的稳定纳米结构钯和铜电极。为了检测汞离子，我们制备了镍/氧化镍电化学传感器，通过温和的热氧化镍箔获得。还报道了一些镍@氧化镍核壳纳米线的结果。研究了氧化时间和温度的影响，以便比较镍@氧化镍纳米线阵列与氧化镍薄膜的性能。所有样品均通过 XRD、SEM 和 EDS 分析进行了表征。为了表征特定电极的性能，如灵敏度、选择性和准确性，进行了电化学测试。得到了非常令人满意的结果。
