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de Meira, Flávio H. A.; Resende, Sayton F.; Monteiro, Douglas S.; Pereira, Márcio C.; Mattoso, Luiz H. C.; Faria, Ronaldo C.; Afonso, André S.

A Non‐enzymatic Ag/δ‐FeOOH Sensor for Hydrogen Peroxide Determination using Disposable Carbon‐based Electrochemical Cells

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  • Medientyp: E-Artikel
  • Titel: A Non‐enzymatic Ag/δ‐FeOOH Sensor for Hydrogen Peroxide Determination using Disposable Carbon‐based Electrochemical Cells
  • Beteiligte: de Meira, Flávio H. A.; Resende, Sayton F.; Monteiro, Douglas S.; Pereira, Márcio C.; Mattoso, Luiz H. C.; Faria, Ronaldo C.; Afonso, André S.
  • Erschienen: Wiley, 2020
  • Erschienen in: Electroanalysis, 32 (2020) 10, Seite 2231-2236
  • Sprache: Englisch
  • DOI: 10.1002/elan.202060171
  • ISSN: 1040-0397; 1521-4109
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: AbstractA non‐enzymatic sensor for hydrogen peroxide (H2O2) determination based on Ag/δ‐FeOOH nanocomposite immobilized on an all‐plastic disposable carbon‐based electrochemical cell (DCell) is constructed by a rapid prototyping technique. Ag/δ‐FeOOH is synthesized by a simple and reproducible method and its structural and morphological properties characterized by X‐ray diffraction (XRD), Fourier transform‐infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The Ag/δ‐FeOOH is successfully immobilized on the DCell, as revealed by SEM images. The electrochemical investigation indicates that the Ag/δ‐FeOOH/DCell has a good electrocatalytic response for the H2O2 reduction, showing detection limit of 71 μmol L−1 H2O2 at a signal‐to‐noise ratio of 3 and analytical sensitivity of 215.4 μA mM−1 cm−2. Moreover, Ag/δ‐FeOOH/DCell can be used to selectively detect H2O2 in the presence of dopamine (DA), uric acid (UA), and ascorbic acid (AA). Finally, Ag/δ‐FeOOH/DCell can be used to determine H2O2 in fetal bovine serum. The achieved results indicate that the non‐enzymatic Ag/δ‐FeOOH/DCell is a cost‐effective alternative for the determination of H2O2.