Issue 4, 2014

Electrostatic fabrication of oleylamine capped nickel oxide nanoparticles anchored multiwall carbon nanotube nanocomposite: A robust electrochemical determination of riboflavin at nanomolar levels

Abstract

A simple and strong electrostatic adsorption of oleylamine (OLA) capped nickel oxide (NiO) nanoparticles (oleylamine–amine group) onto the acid functionalized multiwalled carbon nanotubes (MWCNTs) (–COOH group) through coulombic interaction, leads to the construction of OLA–NiO/MWCNTs nanocomposite. The optimum loading of OLA–NiO nanoparticles on to the acid functionalized MWCNTs is investigated by Fourier transform infrared spectroscopy. Moreover, the optimum amount of loading and stability of the modified electrodes were studied by using linear sweep voltammetry and conductivity of optimum loadings are also studied by electrochemical impedance spectroscopy. OLA–NiO/MWCNTs nanocomposite was fabricated on glassy carbon electrode for the electrochemical determination of riboflavin (RF) at nanomolar levels. The results show a dynamic linear range of 0.009–55.9 μM with excellent sensitivity of 0.489 μA μM−1 and the limit of detection was found to be 1 nM (S/N = 3). The developed OLA–NiO/MWCNTs composite decorated GC exhibited good sensitivity, stability, and reproducibility for the determination of RF in differential pulse voltammetry. The OLA–NiO/MWCNTs/GC modified electrode was applied for the determination of RF in pharmaceutical formulation tablet and syrup samples.

Graphical abstract: Electrostatic fabrication of oleylamine capped nickel oxide nanoparticles anchored multiwall carbon nanotube nanocomposite: A robust electrochemical determination of riboflavin at nanomolar levels

Supplementary files

Article information

Article type
Paper
Submitted
16 Oct 2013
Accepted
28 Nov 2013
First published
28 Nov 2013

Anal. Methods, 2014,6, 1011-1020

Electrostatic fabrication of oleylamine capped nickel oxide nanoparticles anchored multiwall carbon nanotube nanocomposite: A robust electrochemical determination of riboflavin at nanomolar levels

D. R. Kumar, D. Manoj and J. Santhanalakshmi, Anal. Methods, 2014, 6, 1011 DOI: 10.1039/C3AY41810C

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