| Autor: |
Nahdi, Amira, Bibani, Malek, Touati, Fathi, Dhaouadi, Hassouna |
| Zdroj: |
Iranian Journal of Science; February 2024, Vol. 48 Issue: 1 p87-98, 12p |
| Abstrakt: |
Abstract: A novel NiWO4/CuWO4/g-C3N4(NCWG) nanocomposite with excellent electrocatalytic activity was prepared and deposited on Indium-Tin Oxide (ITO) electrode for the electrochemical detection of ascorbic acid (AA). The two-dimensional dispersion of NiWO4and CuWO4on the g-C3N4surface gave a more electroactive surface, subsequently influencing the current intensity of the electro-oxidation of AA. A significant increase of the oxidation current peak of AA at NCWG/ITO was observed and compared to the one obtained at other modified or unmodified ITO electrodes. The analytical parameters of the working electrode NiWO4/CuWO4/g-C3N4vs. Ag/AgCl at an applied potential of − 0.05 V were reported utilizing the amperometric technique. A linear correlation between peak current and AA concentration in the range of 0.1 to 100 μM was obtained with a detection and quantification limits of 0.1 μM/L and 0.35 μM/L, respectively, and a sensitivity of 1.22 µAµM−1cm−2. The novel sensor reveals sensitivity, reliability, and stability, allowing the sensitive determination of AA in tap water samples with satisfactory recoveries. Graphic Abstract: ![]() |
| Databáze: |
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