Title of article :
Electrocatalytic Oxidation Study of Theophylline on a Copper Nanoparticles-Modified, Carbon Paste Electrode Based on Cyclic Voltammetry
Author/Authors :
Ghaemi-Amiri ، Fateme Department of Chemistry - Islamic Azad University, Tehran Science and Research Branch , Aghaie ، Hossein Department of Chemistry - Islamic Azad University, Tehran Science and Research Branch , Giahi ، Masoud Department of Chemistry - Islamic Azad University, Lahijan Branch , Mozaffari ، Majid Department of Chemistry - Islamic Azad University, Shahrood Branch
From page :
99
To page :
112
Abstract :
In this study, the Cu nanoparticles were prepared by reducing CuSO4. These particles were used in making copper nanoparticles modified carbon paste electrode (nano-CPE). The electrochemical characteristics of this electrode (nano-CPE) were investigated. The results of the electrocatalytic oxidation of theophylline (TP) on nano-CPE, using cyclic voltammetry technique showed that nano-CPE, has more reactivity and more effective surface area, as compared to the unmodified carbon paste electrode (un-CPE). The investigation of voltammograms obtained from oxidation of TP at different scan rates on the nano-CPE confirmed a cyclic mediated redox mechanism followed by reducing Cu(III) which is a chemical reaction (EC mechanism). These species formed in more positive potentials and act as a redox intermediate for TP oxidation. There was a linear relationship between the oxidation peak current and the square root of scan rate, showing that the oxidation reaction of TP at nano-CPE might be due to the diffusion-controlled process.
Keywords :
Theophylline , Cu nanoparticle , Electrochemical oxidation , Cyclic voltammetry , Modified carbon paste electrode
Journal title :
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Journal title :
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Record number :
2544330
Link To Document :
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