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Bachiller Baeza, B.
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Publications (2/2 displayed)
- 2017PMo11V@N-CNT electrochemical properties and its application as electrochemical sensor for determination of acetaminophencitations
- 2014Novel electrochemical sensor based on N-doped carbon nanotubes and Fe3O4 nanoparticles: Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acidcitations
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article
PMo11V@N-CNT electrochemical properties and its application as electrochemical sensor for determination of acetaminophen
Abstract
A polyoxometalate-nanocarbon composite, PMo11V@N-CNT, was prepared by a simple procedure which consisted of the immobilization of phosphovanadomolybdate (PMo11V) onto N-doped carbon nanotubes (N-CNT). The FTIR and XPS characterizations confirmed its successful synthesis. The cyclic voltammograms of glassy carbon electrode (GCE) modified with PMo11V and PMo11V@N-CNT showed four Mo-centred redox processes (Mo-VI/V) and a vanadium redox process (V-V/IV). All were surface-confined redox processes. Additionally, PMo11V@N-CNT/GCE showed good stability and well-resolved redox peaks with high current intensities. The electrocatalytic sensing properties of PMo11V@N-CNT/GCE towards acetaminophen (AC) in the presence of tryptophan (TRP) were evaluated by square wave voltammetry. Under the conditions used, the peak current increased linearly with AC concentration in the presence of TRP, with a linear range from 1.5 x 10(-6) to 3.9 x 10(-4) mol dm(-3) and a detection limit of 1.0 x 10(-6) mol dm(-3).