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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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-09-01
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| Series: | C |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5629/10/3/82 |
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| Summary: | 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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| ISSN: | 2311-5629 |