Saeed, Mohsin and Marwani, Hadi M. and Shalauddin, Md. and Alfaifi, Sulaiman Y. and Akhter, Shamima and Alzahrani, Khalid A. and Basirun, Wan Jefrey and Rahman, Mohammed M. (2025) Sensitive detection of unsafe nitrite chemical based on GO@Fe2O3/Y2O3 nanocomposite by electrochemical approach for environmental assessment. Journal of Industrial and Engineering Chemistry, 144. pp. 552-564. ISSN 1226-086X, DOI https://doi.org/10.1016/j.jiec.2024.09.054.
Full text not available from this repository.Abstract
In this study, we quantified nitrite in phosphate buffer solution (PBS) at a pH of 8.00 using linear sweep voltammetry (LSV) under room conditions. The working electrodes (WE) were flat glassy carbon electrodes (GCEs) modified with a nanocomposite of graphene oxide, iron oxide, and yttrium oxide (GO@Fe2O3/Y2O3 NCs), fabricated using a 5 % Nafion conducting coating binder. The GO@Fe2O3/Y2O3 NCs were prepared by a solidstate chemical process and thoroughly analyzed using various techniques, including XRD, FTIR, FESEM, EDS, BET, HRTEM, EIS, and XPS, to examine their binding energy, surface area, crystallinity, structural integrity, functionality, and morphology. Electrochemical characteristics and detection capabilities of the modified electrodes were examined using cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). The linear dynamic range (LDR) for nitrite detection, determined using LSV, was from 0.74 to 1.09 M. The sensor exhibited a sensitivity of 73.83966 mu AmM- 1cm- 2, calculated from the slope of the calibration curve considering the electrode's surface area. The lower limit of detection (LOD) was found to be 2.25 mM, and the limit of quantification (LOQ) was 7.50 mM. Additionally, we thoroughly investigated pH optimization, sensor-probe characteristics, stability, and reliability of the sensor under the same conditions. Validity tests conducted on the GO@Fe2O3/Y2O3 NCs/Nafion/GCE sensor probe demonstrated reliable and accurate performance in spike samples. This novel electrochemical sensor method shows promise for large-scale environmental chemical monitoring, aiming to enhance safety in environmental and healthcare sectors.
| Item Type: | Article |
|---|---|
| Funders: | King Abdulaziz University (GPIP: 1221-961-2024) |
| Uncontrolled Keywords: | Nitrite detection; Cyclic voltammetry; Linear sweep voltammetry; Safety |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 29 Apr 2025 08:00 |
| Last Modified: | 29 Apr 2025 08:00 |
| URI: | http://eprints.um.edu.my/id/eprint/47900 |
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