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<strong>A novel electrochemical sensor based on Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>-ZnO multi metal oxide nanocomposite</strong> <strong>for simultaneous detection of nanomolar Pb<sup>2+</sup> and Hg<sup>2+</sup> in different kind of spices</strong>

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Title Statement <strong>A novel electrochemical sensor based on Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>-ZnO multi metal oxide nanocomposite</strong> <strong>for simultaneous detection of nanomolar Pb<sup>2+</sup> and Hg<sup>2+</sup> in different kind of spices</strong>
 
Added Entry - Uncontrolled Name Davoudi, Shahnaz
Givianrad, Mohammad Hadi
Saber-Tehrani, Mohammad
Aberoomand Azar, Parviz
 
Uncontrolled Index Term Analytical chemistry
Electrochemical determination; modified electrode; Co3O4-CeO2-ZnO; Multi-metal oxide; Pb2+; Hg2+
 
Summary, etc. Simultaneous and individual determination of Pb<sup>2+</sup> and Hg<sup>2+</sup> ions were carried out based on the synergistic effect of Co<sub>3</sub>O<sub>4</sub>, CeO<sub>2</sub> and ZnO nanoparticles into the carbon paste electrode. The morphology of synthesized nanocomposite (Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>-ZnO) was investigated by Scanning Electron Microscope, Transmission Electron Microscope, X-ray diffraction and Fourier Transform Infrared spectroscopy. The voltammetric current has increased linearly by increasing the concentration of Pb<sup>2+</sup> and Hg<sup>2+</sup> ions. The linear ranges of the Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>-ZnO/CPE sensor were obtained 0.27-18.42 (for Pb<sup>2+</sup> ions) and 0.42-31.30 nM (for Hg<sup>2+</sup> ions), under optimum condition. The detection limits (3S<sub>b</sub>/m) were obtained 0.054 nM for Pb<sup>2+</sup> and 0.097 nM for Hg<sup>2+</sup>, respectively. The proposed electrochemical sensor acts as a sensitive and selective method for simultaneous determination of two heavy metal ions and shows excellent repeatability, reproducibility, and stability, with relative standard deviation (RSD) less than 3%. Finally, Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>-ZnO/CPE was successfully applied for the determination of Pb<sup>2+</sup> and Hg<sup>2+</sup> in different kind of spices.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-12 16:16:29
 
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http://op.niscair.res.in/index.php/IJCA/article/view/24370
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 58, ##issue.no## 10 (2019): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/24370/465476294
 
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