A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode
In this study, an efficient H<sub>2</sub>O<sub>2</sub> sensor was developed based on electrochemical Prussian blue (PB) synthesized from the acid suspension of δ-FeOOH and K<sub>3</sub>[Fe(CN)<sub>6</sub>] using cyclic voltammetry (CV) and anchored on...
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2024-09-01
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| author | Karoline S. Nantes Ana L. H. K. Ferreira Marcio C. Pereira Francisco G. E. Nogueira André S. Afonso |
| author_facet | Karoline S. Nantes Ana L. H. K. Ferreira Marcio C. Pereira Francisco G. E. Nogueira André S. Afonso |
| author_sort | Karoline S. Nantes |
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| description | In this study, an efficient H<sub>2</sub>O<sub>2</sub> sensor was developed based on electrochemical Prussian blue (PB) synthesized from the acid suspension of δ-FeOOH and K<sub>3</sub>[Fe(CN)<sub>6</sub>] using cyclic voltammetry (CV) and anchored on carbon felt (CF), yielding an enhanced CF/PB-FeOOH electrode for sensing of H<sub>2</sub>O<sub>2</sub> in pH-neutral solution. CF/PB-FeOOH electrode construction was proved by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), and electrochemical properties were verified by impedance electrochemical and CV. The synergy of δ-FeOOH and PB coupled to CF increases electrocatalytic activity toward H<sub>2</sub>O<sub>2,</sub> with the sensor showing a linear range of 1.2 to 300 μM and a limit of detection of 0.36 μM. Notably, the CF/PB-FeOOH electrode exhibited excellent selectivity for H<sub>2</sub>O<sub>2</sub> detection in the presence of dopamine (DA), uric acid (UA), and ascorbic acid (AA). The calculated H<sub>2</sub>O<sub>2</sub> recovery rates varied between 93% and 101% in fetal bovine serum diluted in PBS. This work underscores the potential of CF/PB-FeOOH electrodes in progressing electrochemical sensing technologies for various biological and environmental applications. |
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| publishDate | 2024-09-01 |
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| spelling | doaj-art-5d8693a6de2540b5b9aaae4c0835c5dd2025-08-20T01:55:21ZengMDPI AGC2311-56292024-09-011038210.3390/c10030082A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt ElectrodeKaroline S. Nantes0Ana L. H. K. Ferreira1Marcio C. Pereira2Francisco G. E. Nogueira3André S. Afonso4Institute of Science, Engineering, and Technology, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM), Teófilo Otoni 39803-371, BrazilInstitute of Science, Engineering, and Technology, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM), Teófilo Otoni 39803-371, BrazilInstitute of Science, Engineering, and Technology, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM), Teófilo Otoni 39803-371, BrazilDepartment of Chemical Engineering, Federal University of São Carlos (UFSCar), São Carlos 13565-905, BrazilInstitute of Science, Engineering, and Technology, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM), Teófilo Otoni 39803-371, BrazilIn this study, an efficient H<sub>2</sub>O<sub>2</sub> sensor was developed based on electrochemical Prussian blue (PB) synthesized from the acid suspension of δ-FeOOH and K<sub>3</sub>[Fe(CN)<sub>6</sub>] using cyclic voltammetry (CV) and anchored on carbon felt (CF), yielding an enhanced CF/PB-FeOOH electrode for sensing of H<sub>2</sub>O<sub>2</sub> in pH-neutral solution. CF/PB-FeOOH electrode construction was proved by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), and electrochemical properties were verified by impedance electrochemical and CV. The synergy of δ-FeOOH and PB coupled to CF increases electrocatalytic activity toward H<sub>2</sub>O<sub>2,</sub> with the sensor showing a linear range of 1.2 to 300 μM and a limit of detection of 0.36 μM. Notably, the CF/PB-FeOOH electrode exhibited excellent selectivity for H<sub>2</sub>O<sub>2</sub> detection in the presence of dopamine (DA), uric acid (UA), and ascorbic acid (AA). The calculated H<sub>2</sub>O<sub>2</sub> recovery rates varied between 93% and 101% in fetal bovine serum diluted in PBS. This work underscores the potential of CF/PB-FeOOH electrodes in progressing electrochemical sensing technologies for various biological and environmental applications.https://www.mdpi.com/2311-5629/10/3/82carbon felthydrogen peroxideδ-FeOOHPrussian bluenon-enzymatic sensor |
| spellingShingle | Karoline S. Nantes Ana L. H. K. Ferreira Marcio C. Pereira Francisco G. E. Nogueira André S. Afonso A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode C carbon felt hydrogen peroxide δ-FeOOH Prussian blue non-enzymatic sensor |
| title | A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode |
| title_full | A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode |
| title_fullStr | A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode |
| title_full_unstemmed | A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode |
| title_short | A Novel Non-Enzymatic Efficient H<sub>2</sub>O<sub>2</sub> Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode |
| title_sort | novel non enzymatic efficient h sub 2 sub o sub 2 sub sensor utilizing δ feooh and prussian blue anchoring on carbon felt electrode |
| topic | carbon felt hydrogen peroxide δ-FeOOH Prussian blue non-enzymatic sensor |
| url | https://www.mdpi.com/2311-5629/10/3/82 |
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