Simultaneous electro-generation and electro-deposition of copper oxide nanoparticles on glassy carbon electrode and its
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Simultaneous electro‑generation and electro‑deposition of copper oxide nanoparticles on glassy carbon electrode and its sensor application R. Shashanka1 · B. E. Kumara Swamy2 Received: 5 March 2020 / Accepted: 15 April 2020 © Springer Nature Switzerland AG 2020
Abstract Copper oxide nanoparticles (CuO) were electro-generated and electro-deposited simultaneously on the glassy carbon electrode (GCE) using cyclic voltammetry at a reduction potential of − 1.4 V to − 0.2 V in 0.1 M NaOH and 1.67 mM CuCl solution. The electrodeposited CuO nanoparticles show an excellent electro-catalytic activity towards the detection of potassium ferricyanide. The scan rate, concentration of the analyte and pH of the solution were varied accordingly to study the stability of the copper oxide deposited glassy carbon electrode (CuO/GCE). The CuO/GCE electrode shows amazing stability, charge transfer and reproducibility even at low concentration of the analyte. The cyclic voltammetry is proved to be one of the convenient methods to reduce the precursors into metal oxide nanoparticles just by applying suitable current. The main advantage of this method is uniform deposition of CuO nanoparticles on GCE and thus increases the number of active sites, surface area and electro-catalytic properties. Scanning electron microscopy (SEM) was used to study the morphology of the electro-generated CuO nanoparticles. The zeta-potential analysis was carried out to study the surface potential of charged CuO nanoparticles and it was found to be + 58.29 mV. Further, CuO nanoparticles were characterized by X-ray diffraction to study the phases. UV–visible spectroscopy depicts the absorption peak at 288 nm confirms the formation of CuO nanoparticles. This absorption is attributed by the electronic transition from valence band to conduction band due to the quantum size of the particles.
* R. Shashanka, [email protected] | 1Department of Metallurgical and Materials Engineering, Bartin University, Bartin 74100, Turkey. 2Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Shimoga, Karnataka 577451, India. SN Applied Sciences
(2020) 2:956
| https://doi.org/10.1007/s42452-020-2785-1
Vol.:(0123456789)
Research Article
SN Applied Sciences
(2020) 2:956
| https://doi.org/10.1007/s42452-020-2785-1
Graphical abstract
Keywords Electro-generation · Copper oxide nanoparticles · Glassy carbon electrode · Potassium ferricyanide · Cyclic voltammetry
1 Introduction Nanotechnology has become a hot research area for many researchers working in chemistry, physics, materials science, biomaterials field etc. due to the excellent and unique properties of nanomaterials [1]. In recent past, the researchers showing a substantial interest in metal oxide nanoparticles due to their unusual, unique and remarkable properties due to very fine size [2–5]. It has been reported that as the particle size of the nanomaterials decreases; then most of their properties like catalytic properties [6, 7], mechanical r
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