Efficient detection of ascorbic acid utilizing molybdenum Oxide@Prussian Blue/Graphite felt composite electrodes - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Electrochimica Acta Year : 2019

Efficient detection of ascorbic acid utilizing molybdenum Oxide@Prussian Blue/Graphite felt composite electrodes

Laxian Yu
  • Function : Author
Jihua Zhao
Jian Fang
  • Function : Author

Abstract

A low cost, sensitive and efficient ascorbic acid (AA) sensor was developed using a molybdenum oxide (MoOx) and Prussian Blue (PB) nanocomposite, anchored on a graphite felt (GF) substrate (MoOx@PB/GF). MoO2 nanorods, which were fabricated by annealing of Mo-precursor, play a key role in promoting the synthesis of PB from Fe3+ and [Fe(CN)6]3-. The as-prepared electrode was characterized by scanning electronmicroscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and electrochemical methods. The modified electrode exhibited outstanding performances for the electrocatalytic oxidation of AA, with a sensitivity as high as 0.37 A/M, a good linear response in a concentration range from 0.0125 μM to 293 μM, an ultra-low detection limit of 0.0119 μM (S/N = 3), as well as a notable reproducibility and an excellent selectivity. Finally, the composite electrode gave satisfactory results for practical sample analyses, e.g. standard AA added in drinking water.
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Dates and versions

hal-02403300 , version 1 (10-12-2019)

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Laxian Yu, Jihua Zhao, Simon Tricard, Qiangming Wang, Jian Fang. Efficient detection of ascorbic acid utilizing molybdenum Oxide@Prussian Blue/Graphite felt composite electrodes. Electrochimica Acta, 2019, 322, pp.134712. ⟨10.1016/j.electacta.2019.134712⟩. ⟨hal-02403300⟩
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