Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran.
Department of Chemistry, Payamenoor, Tehran, 19395-4697, Iran.
Environ Sci Pollut Res Int. 2021 Aug;28(29):38809-38816. doi: 10.1007/s11356-021-13299-6. Epub 2021 Mar 19.
In this study, copper oxide nanoparticles (CuONPs) were prepared by a simple chemical method and then characterized by scanning electron microscope (SEM). A novel electrochemical sensor for hydrogen peroxide (HO) analysis was prepared by immobilizing copper oxide nanoparticles and polyalizarin yellow R (PYAR) on bare glassy carbon electrode (PAYR/CuONPs/GCE). The electrocatalytical behavior of the proposed electrochemical sensor was also studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). Based on the results, the PAYR/CuONP nanocomposite had significant electrocatalytic oxidation and reduction properties for the detection and determination of HO. Some parameters such as linear range, sensitivity, and detection limit for reduction peak were obtained as 0.1-140 μM, 1.4154 μA cm μM, and 0.03 μM, respectively, by the DPV technique. Some advantages of this electrode were having widespread linear range, low detection limit, and, most importantly, ability in simultaneous oxidation and reduction of HO at two applied potentials.
在这项研究中，通过简单的化学方法制备了氧化铜纳米粒子（CuONPs），并用扫描电子显微镜（SEM）对其进行了表征。通过将氧化铜纳米粒子和聚茜素黄 R（PYAR）固定在裸玻碳电极（PAYR/CuONPs/GCE）上，制备了一种用于分析过氧化氢（HO）的新型电化学传感器。通过循环伏安法（CV）、电化学阻抗谱（EIS）和差分脉冲伏安法（DPV）研究了所提出的电化学传感器的电催化行为。基于这些结果，PAYR/CuONP 纳米复合材料对 HO 的检测和测定具有显著的电催化氧化和还原性能。通过 DPV 技术，获得了还原峰的一些参数，如线性范围、灵敏度和检测限分别为 0.1-140 μM、1.4154 μA cm μM 和 0.03 μM。该电极的一些优点是具有广泛的线性范围、低检测限，最重要的是，能够在两个施加的电势下同时氧化和还原 HO。
