Glassy carbon electrodes modified by multiwalled carbon nanotubes and poly(neutral red): a comparative study of different brands and application to electrocatalytic ascorbate determination

Analytical and Bioanalytical Chemistry
Ricardo C CarvalhoChristopher M A Brett

Abstract

The electrochemical behaviour of glassy carbon electrodes coated with multiwalled carbon nanotubes (MWCNT) from three different sources and with different loadings has been compared, with a view to sensor applications. Additionally, poly(neutral red) (PNR) was electrosynthesised by potential cycling on bare glassy carbon and on MWCNT-modified glassy carbon electrodes, and characterised by cyclic voltammetry and scanning electron microscopy. Well-defined voltammetric responses were observed for hexacyanoferrate (II) oxidation with differences between the MWCNT types as well as from loading. The MWCNT and PNR/MWCNT-modified electrodes were applied to the oxidative determination of ascorbate, the electrocatalytic effects observed varying according to the type of nanotubes. Comparison was made with electrodes surface-modified by graphite powder. All modified electrode configurations with and without PNR were successfully employed for ascorbate oxidation at +0.05 V vs saturated calomel electrode with detection limits down to 4 μM; good operational stability and storage stability were also obtained.

References

Oct 2, 1998·Science·J ChenR C Haddon
Oct 25, 2001·Journal of the American Chemical Society·A KuznetsovaJ G Chen
Mar 29, 2002·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Hideshi KimotoHajime Kayanne
Sep 17, 2004·Journal of the American Chemical Society·J Justin GoodingD Brynn Hibbert
Jan 24, 2006·The Analyst·Craig E Banks, Richard G Compton
Oct 4, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Jennifer L Lyon, Keith J Stevenson
Dec 1, 2007·Chemical Communications : Chem Comm·Lidong ShaoMalcolm L H Green
Apr 8, 2009·Bioelectrochemistry·Madalina M Barsan, Christopher M A Brett
Nov 12, 2009·Chemical Communications : Chem Comm·Ioana DumitrescuJulie V Macpherson
Feb 23, 2010·Analytica Chimica Acta·Christopher B JacobsB Jill Venton

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Citations

Dec 25, 2012·Analytical and Bioanalytical Chemistry·A Carolina TorresChristopher M A Brett
Jan 24, 2013·Analytical and Bioanalytical Chemistry·Csaba Janáky, Csaba Visy
Feb 26, 2011·Physical Chemistry Chemical Physics : PCCP·Madalina M BarsanChristopher M A Brett
Jun 5, 2015·Analytica Chimica Acta·Madalina M BarsanChristopher M A Brett
Oct 20, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Lorena Athie GoulartLucia Helena Mascaro

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