Journal of Solid State Electrochemistry

, Volume 18, Issue 4, pp 1015–1023

Iron nanoparticles decorated graphene-multiwalled carbon nanotubes nanocomposite-modified glassy carbon electrode for the sensitive determination of nitrite

Original Paper

DOI: 10.1007/s10008-013-2349-z

Cite this article as:
Mani, V., Wu, TY. & Chen, SM. J Solid State Electrochem (2014) 18: 1015. doi:10.1007/s10008-013-2349-z

Abstract

In the present work, we described the preparation of iron nanoparticles decorated graphene-multiwalled carbon nanotubes nanocomposite (GR-MWCNTs/FeNPs) modified glassy carbon electrode (GCE) and its application for the sensitive determination of nitrite. First, GR-MWCNTs/FeNPs nanocomposite has been prepared by a simple solution-based approach via chemical reduction and then it was characterized. Afterwards, GR-MWCNTs/FeNPs/GCE was prepared and employed for the electrocatalysis of nitrite. Electrocatalytic oxidation of nitrite at the GR-MWCNTs/FeNPs/GCE has been significantly improved in terms of both reduction in overpotential and increase in peak current. Therefore, the modified electrode was employed for amperometric determination of nitrite which exhibited excellent analytical parameters with wide linear range of 1 × 10−7 M to 1.68 × 10−3 M and very low detection limit of 75.6 (±1.3) nM. The proposed sensor selectively detects nitrite even in the presence of high concentration of common ions and biological interferrants. Good recoveries achieved for the determination of nitrite in various water samples reveal the promising practicality of the sensor. In addition, the sensor displays an acceptable repeatability and reproducibility along with appreciable storage and excellent operational stabilities.

Figure

Schematic representation for the preparation of GR-MWCNTs/FeNPs nanocomposite and its electrocatalysis towards nitrite

Keywords

Graphene Carbon nanotube Iron nanoparticles Nitrite Electrocatalysis Amperometry 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and BiotechnologyNational Taipei University of TechnologyTaipeiPeople’s Republic of China

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