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Research Article | Open Access

Performance Improvement of Working Electrode Using Grafted Polymer Modified with SiO2 Nanoparticles

Muhammed Mizher Radhi1( ), Ahmed Ali Moosa2, Ishraq Abd-Alkareem Khalaf2
Radiological Techniques Department, Health and Medical Technology College-Baghdad, Middle Technology University, Baghdad, (MTU) Iraq
Technical Engineering College-Baghdad, Middle Technology University, Baghdad, (MTU) Iraq
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Abstract

A new modified glassy carbon electrode (GCE) with grafted polymer (GP)/SiO2 nanoparticles (SiO2 NPs) were prepared using mechanical attachment method to produce a new sensor in cyclic voltammetric technique. The new working electrode GP/SiO2 NPs/GCE was characterized by a standard solution of 1 mM K4[Fe(CN)6] with 1 M K2HPO4 as an electrolyte to study the redox current peaks of FeⅡ/FeⅢ ions at different concentrations such as scan rate, pH, determination of diffusion coefficient (Df), reliability and stability of the modified GCE. It was found that the new modified electrode enhanced the redox current peaks of FeⅡ/FeⅢ from 12 μA to 20 μA and -5 μA to -15 μA for oxidation and reduction peaks in GCE, repectevely. So, the current ratio (Ipa/Ipc) for the new modified electrode was 1, and the potential peak separation (ΔEpa-c) was 100 mV, which indicated good electrochemical properties as an irreversible electrode and heterogeneous reaction. Good reliability and stability of modified GCE was obseved with low detection limit. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis of the nano-deposit was also studied.

Keywords

Silica nanoparticlesCyclic voltammetryGCEFeⅡ/FeⅢGrafted polymer

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Nano Biomedicine and Engineering
Volume 10 Issue 2,
June 2018
Pages 156-164
DOI: 10.5101/nbe.v10i2.p156-164
Cite this article:
Radhi MM, Moosa AA, Khalaf IA-A. Performance Improvement of Working Electrode Using Grafted Polymer Modified with SiO2 Nanoparticles. Nano Biomedicine and Engineering, 2018, 10(2): 156-164. https://doi.org/10.5101/nbe.v10i2.p156-164

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Received: 30 March 2018
Accepted: 17 May 2018
Published: 28 May 2018
© Muhammed Mizher Radhi, Ahmed Ali Moosa, and Ishraq Abd-Alkareem Khalaf.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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