Abstract
In this work, a new nanocomposite of nickel-doped copper hydroxide nanoparticles/graphitic carbon nitride was prepared and used to modify the surface of glassy carbon electrode (Ni:Cu(OH)2/g-C3N4/GCE) without any binder. The modified electrode was employed to determine Ponceau 4 R food colorant in aqueous solution by square wave voltammetry. The newly prepared nanocomposite was characterized by Fourier transform infrared spectroscopy, ultraviolet-visible absorption spectrophotometry, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Under optimal experimental conditions, Ni:Cu(OH)2/g-C3N4/GCE presented a linear response to Ponceau 4 R oxidation in the concentration range from 0.1 to 10 μM with a detection limit of 56 nM and sensitivity of 2.273 μA μM−1. Besides, acceptable selectivity against interfering species, good stability and high reproducibility of the electro-oxidation response for 400 successive measurements of Ponceau 4 R on a modified electrode after regeneration in 0.1 M NaOH solution are other advantages of the fabricated electrode. The developed sensor was successfully for the analysis of Ponceau 4 R in complex matrices such as fruit juice and jelly samples with acceptable recoveries.
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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