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Abstract
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A glassy carbon electrode (GCE) modified with an ordered mesoporous carbon/Ag nanoparticle
nanocomposite, namely an OMC/Ag-NP-modified GCE, was prepared by casting an OMC/Ag NP
nanocomposite on a GCE. The morphological properties of the OMC/Ag NP nanocomposite was
characterized by applying various techniques such as X-ray diffraction (XRD), field emission scanning
electron microscopy (FESEM), and transmission electron microscopy (TEM), and the electrochemical
properties of the modified electrode were investigated using cyclic voltammetry. The electrocatalytic
reduction of iodate on the modified electrode was also studied using cyclic voltammetry as well as by
using amperometric methods. The prepared modified electrode showed good electrocatalytic
properties, fast response time, good stability and reproducibility. The performance of the sensor
exhibited a linear range from 15.0 106 to 4.43 103 M with a limit of detection of 3.01 106 M
(S/N ¼ 3), and the sensitivity of the sensor was found to be 1.92 mA mM1 cm2. The modified electrode
was applied successfully to the determination of iodate concentration in salt samples using the
amperometric method, which demonstrated the applicability of the modified electrode.
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