Glassy carbon electrode modified with graphene oxide and gold nanoparticles for ascorbic acid detection

Szőke, Árpád F. and Mureşan, Liana M. and Turdean, Graziella L. and Zsebe, Zoltán and Ablaeva, Kamila: Glassy carbon electrode modified with graphene oxide and gold nanoparticles for ascorbic acid detection. In: Proceedings of the International Symposium on Analytical and Environmental Problems, (23). pp. 334-337. (2017)

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Abstract

Glassy carbon electrodes modified with graphene oxide (GO), gold nanoparticles (AuNP) and methylene blue (MB) were produced by drop casting method for ascorbic acid (AA) determination. Nafion was used as a polymeric immobilizing matrix. The GCE/GO-AuNP-MB-Nafion and GCE/GO-AuNP-Nafion electrodes were characterized by using cyclic voltammetry and electrochemical impedance spectroscopy to investigate electrocatalytic effect, stability and reproductibility. After optimization, the analytical parameters of the modified electrodes were determined by amperometry. The limit of detection for ascorbic acid at GCE/GO-AuNP-Nafion modified electrode was 2.4 µM and the linear domain from 5 to 50 µM. The electrodes showed significant electrocatalytic effect with good stability and reproductibility.

Item Type: Article
Journal or Publication Title: Proceedings of the International Symposium on Analytical and Environmental Problems
Date: 2017
Volume: 23
ISBN: 978-963-306-563-1
Page Range: pp. 334-337
Uncontrolled Keywords: Elektrokémia, Kémia
Additional Information: Bibliogr.: 337. p. ; összefoglalás angol nyelven
Date Deposited: 2019. Jan. 02. 17:36
Last Modified: 2019. Jan. 02. 17:36
URI: http://acta.bibl.u-szeged.hu/id/eprint/56220

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