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. 2023 Apr 21;8(17):15450-15457.
doi: 10.1021/acsomega.3c00715. eCollection 2023 May 2.

Synthesis and Characterization of Ferric Vanadate Nanorods for Efficient Electrochemical Detection of Ascorbic Acid

Nadia Anwar  1 , Muhammad Munir Sajid  2 , Muhammad Aamir Iqbal  3 , Haifa Zhai  2   4 , Muqarrab Ahmed  5 , Bushra Anwar  6 , Kareem Morsy  7 , Rey Y Capangpangan  8 , Arnold C Alguno  9 , Jeong Ryeol Choi  10
Affiliations

Synthesis and Characterization of Ferric Vanadate Nanorods for Efficient Electrochemical Detection of Ascorbic Acid

Nadia Anwar et al. ACS Omega. .

Abstract

This study reports the synthesis of ferric vanadate (FeVO4) via a facile hydrothermal method, focusing on demonstrating its exceptional electrochemical (EC) properties on detecting low-density ascorbic acid (AA). The phase purity, crystallinity, structure, morphology, and chemical compositional properties were characterized by employing X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy techniques. EC impedance spectroscopy and cyclic voltammetry techniques were also adopted in order to assess the EC response of a FeVO4-modified glassy carbon electrode for sensing AA at room temperature. The AA concentration range adopted in this experiment is 0.1-0.3 mM at a working electric potential of -0.13 V. The result showed functional excellence of this material for the EC determination of AA with good stability and reproducibility, promising its potentiality in connection with relevant sensing applications.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Schematic illustration for the preparation of FeVO4 nanorods.
Figure 2
Figure 2
SEM images of hydrothermally prepared FeVO4 nanorods prepared at 180 °C at different magnifications: (a) 1 μm and (b) 200 nm.
Figure 3
Figure 3
EDX image of FeVO4 confirming the elemental composition in the sample.
Figure 4
Figure 4
XRD patterns of as-synthesized FeVO4 nanorods.
Figure 5
Figure 5
Raman spectra of the prepared FeVO4 nanorods.
Figure 6
Figure 6
XPS spectra of FeVO4: (a) outline of the overall main peaks, (b) Fe 2p, (c) V 2p, and (d) O 1s.
Figure 7
Figure 7
The main graphics (the inset) is the variation of the surface area depending on the relative pressure (the pore diameter) for the FeVO4 nanorods, where the data are measured with the BET technique.
Figure 8
Figure 8
EIS spectra of bare GCE and GCE-modified FeVO4 nanorods. The inset image clarifies the portion of the semicircle and straight line explained in the text.
Figure 9
Figure 9
(a) CV peaks of AA at various scan rates, (b) CV peaks of AA at different concentrations, and (c) recycling for 1st and 15th cycle in Li2SO4 and AA (0.1 mM) solution at a scan rate of 50 mV s–1.
Figure 10
Figure 10
Schematic illustration for the detection of AA using the FeVO4 nanorod-modified GCE.
See this image and copyright information in PMC

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