| Autor: |
Pawar, Sarla K., Wadodkar, Nikita A., Salunke, Rahul S., Patil, Amardip M., Umar, Ahmad, Ibrahim, Ahmed A., Akbar, Sheikh, Baskoutas, Sotirios, Shirale, Dhammanand J. |
| Zdroj: |
Journal of the Electrochemical Society; December 2024, Vol. 171 Issue: 12 p127517-127517, 1p |
| Abstrakt: |
This study presents a novel approach to electrochemical detection of orthophosphate in potable water using hydrothermally synthesized nickel foam electrodes, modified with cobalt oxide (CoOx), zinc oxide (ZnOx), and zinc-cobalt oxide (ZnCoOx) nanocomposites. The incorporation of zinc-cobalt oxide into the electrode significantly enhances its stability and detection capability. In-situ phosphate detection was performed using voltammetric techniques in a highly alkaline environment (pH 14) facilitated by sodium hydroxide (NaOH). Comprehensive electrode characterization, including cyclic voltammetry (0 to 0.6 V at a scan rate of 50 mV s−1), electrochemical impedance spectroscopy (105to 10–2 Hz), scanning electron microscopy, and energy-dispersive X-ray spectroscopy, confirmed the superior performance of the synthesized electrodes. Among the tested configurations, the zinc-cobalt oxide nanocomposite on nickel foam exhibited outstanding sensitivity, with a sensitivity of 0.4 μA/μM across a concentration range of 0 to 40 μM, and an elevated sensitivity of 4.26 μA/μM within the 50 to 100 μM range. The electrode achieved a remarkably low detection limit of 0.171 μM L−1(0 to 40 μM detection range) and 0.324 μM L−1(50 to 100 μM, detection range), underscoring its potential for highly accurate phosphate detection. These findings highlight the sensor’s applicability for diverse practical uses in water quality monitoring. |
| Databáze: |
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