Nickel Oxide Nanoparticles Modified Gold Electrode for Fractional Determination of Dopamine and Ascorbic Acid
- Authors: Mohamed I. Awad 1,2, Jahdaly B.A.1, Kassem M.A.1,3, Hazazi O.A.1
-
Affiliations:
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University
- Chemistry Department, Faculty of Science, Cairo University
- Chemistry Department, Faculty of Science, Benha University
- Issue: Vol 73, No 12 (2018)
- Pages: 1188-1194
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182888
- DOI: https://doi.org/10.1134/S1061934818120067
- ID: 182888
Cite item
Abstract
Dopamine and ascorbic acid has been fractionally determined at nickel oxide nanoparticles (nano-NiOx) modified polycrystalline gold electrode (poly-Au), nano-NiOx/Au, with high selectivity using voltammetric techniques. Nano-NiOx/Au electrode, fabricated electrochemically, could resolve the overlapping obtained at the bare poly-Au electrode. Nano-NiOx/Au electrode was prepared by cycling of potential of Au electrode in diluted Watts bath in the potential range between 0.0 and –1.0 V vs. Ag/AgCl (KCl sat.), and was characterized morphologically and electrochemically. Effect of loading level of nickel was examined by changing the number of potential cycles for the deposition of nickel nanoparticles, i.e., 1, 2 and 5 potential cycles were used. Also the effects of the electrooxidation of the thus deposited nickel nanoparticles and pH of the electrolyte on the voltammetric behavior were investigated. The good calibration curve of an acceptable rectilinear range is obtained at nano-NiOx/Au electrode in which nano-Ni was prepared by two potential cycles and subsequently electro-oxidized in KOH solution.
Keywords
About the authors
Mohamed I. Awad
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University; Chemistry Department, Faculty of Science, Cairo University
Author for correspondence.
Email: mawad70@yahoo.com
Saudi Arabia, Makkah Al-Mukarramah; Cairo
B. A. AL Jahdaly
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University
Email: mawad70@yahoo.com
Saudi Arabia, Makkah Al-Mukarramah
Mohammed A. Kassem
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University; Chemistry Department, Faculty of Science, Benha University
Email: mawad70@yahoo.com
Saudi Arabia, Makkah Al-Mukarramah; Benha, 13518
Omar A. Hazazi
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University
Email: mawad70@yahoo.com
Saudi Arabia, Makkah Al-Mukarramah
![](/img/style/loading.gif)