Analytical chemistry council

METHODS AND OBJECTS OF CHEMICAL ANALYSIS

ISSN title: "Metody i obʺekty himičeskogo analiza"

An international journal devoted to all aspects of Analytical chemistry

ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)

Kiev University
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Planar Electrodes, Modified with Gold and Carbon Nanomaterials, as Sensitive Elements of Н2O2 Voltammetric Sensors

A.V. Huseinov, D.M. Korytko, S.A. Alekseev*, O.Y. Tananaiko**

*,** Corresponding authors
Taras Shevchenko National University of Kyiv, Volodymyrska str., 64, Kyiv, Ukraine, 01601
E-mail: alekseev@univ.kiev.ua*; nadzhafova@univ.kiev.ua**

Methods Objects Chem. Anal., 2016, 11(2), p. 88-99

https://doi.org/10.17721/moca.2016.82-93

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Abstract

Sensitive element of hydrogen peroxide amperometric sensor based on planar carbon electrodes (PCE), modified with gold particles and composite film silica-carbon nanomaterials has been developed. The combination of gold particles and composite film SiO2-multi-wall carbon nanotubes (MWCNTs) as a PCE modifiers allows to detect H2O2 by its oxidation current in the concentration range of 10-5-10-3 M with the detection limit of 7.010-6 M, which is one order lower than for PCE. A tenfold excess of ascorbic acid and other strong reductants interfere H2O2 determination. Using of PCE, modified with SiO2-CFO film, where CFO–nanoparticles of carbon fluorooxide, allows to detect hydrogen peroxide by its reduction current, that significantly improves a selectivity. The highest sensitivity and linear range of calibration graph for H2O2 determination were obtained for PCE-SiO2-CFO.

Keywords: planar electrodes, silicon oxide, sol-gel, voltammetry, carbon nanoparticles, gold particles

Article language: Rus

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Publisher:Taras Shevchenko National University, Kiev Ukraine

(Analytical chemistry department at Taras Shevchenko National University, 64 Vladimirskaya STR., Kiev, 01601 UKRAINE)
analysis@univ.kiev.ua, www.achem.univ.kiev.ua, +380-44-2393266

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The journal website: www.moca.net.ua

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