Performance Optimization of Electrochemical Sensor based on Iron Oxide-reduced Graphene Oxide Nanocomposite: Application for Environmental Monitoring |
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| Amira Ghezal, Ammar Al-Hamry, Leonardo G. Paterno, Mounir Ben Ali, Olfa Kanoun |
- Abstract:
- In this work, an electrochemical sensor based on iron oxide-reduced graphene oxide nanococmposite modified screen printed graphite electrode (Fe3O4-rGO/SPGE) has been developed for selective detection of nitrite ions in drinking water using differential pulse voltammetry (DPV). The proposed nitrite electrochemical sensor exhibited a relative standard deviation of 4.37% for three replicate analysis of 10-3 M L-1 NO2. In addition, it displays high electrochemical stability for nitrite oxidation over the pH 6.5, high sensitivity and low limit of detection of 1.2 x 10-5 M L-1 with good selectivity in the concentration range 10-4 - 10-3 which is the range where the rate of nitrite is maximum. These results prove that the metal oxide-rGO nanocomposite modified SPGE has good applications for the determination of nitrite in water.
- Keywords:
- Iron Oxide-reduced graphene oxide nanocomposites, Electrochemical detection, Nitrite sensor
- Download:
- IMEKO-TC19-2019-02.pdf
- DOI:
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