الرئيسية / الفعاليات العلمية / ابحاث / Copper Metal at New CuO Nanoparticles Modified Carbonpaste Electrode: Selective Voltammetric Determination

Copper Metal at New CuO Nanoparticles Modified Carbonpaste Electrode: Selective Voltammetric Determination

Amer Mousa Jouda, Emad Salaam Abood , Mothana Salih Mashloor
Department of Chemistry, Faculty of Science, University of Kufa, 54001 AnNajaf, Iraq.
Corresponding author. E-mail: [email protected]
Received: May 5, 2018; Accepted: Jul. 12, 2018; Published: Aug. 20, 2018.
Citation: Amer Mousa Jouda, Emad Salaam Abood, and Mothana Salih Mashloor, Copper Metal at New CuO Nanoparticles Modifed Carbonpaste
Electrode: Selective Voltammetric Determination.
Nano Biomed. Eng., 2018, 10(3): 243-249.
DOI: 10.5101/nbe.v10i3.p243-249.
Abstract
A new carbon paste electrode modified with CuO nanoparticles was prepared, and used to study
the electro oxidation of copper ions in solution by cyclic voltammetry (CV) method. The modifed
electrode displayed strong resolving function for the overlapping voltammetric response of copper
into one well-defned peak. The potential difference between Epa and Epc was > 200 mV; this range
referred to the quise-reversible mechanism. The kinetic of electrode was studied at the temperature
range from 15 ~ 35 °C; the data of voltamograms showed the increase of temperature caused increase
of negative shift, which suggested the diffusion electron transfer in the redox process of copper
oxidation. Diffusion coeffcient was calculated from the Randles-Sevcik equation and was equal to
71.8 × 10
-4; the rate constant K was equal to 8.8 × 10-7; the peak current of copper increased linearly
with its concentration at the range of 0.2 ~ 2.0 ppm.
Keywords: Cyclic voltammetry; Nanoparticles; Electrodes

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