Performance Optimization of Electrochemical Sensor based on Iron Oxide-reduced Graphene Oxide Nanocomposite: Application for Environmental Monitoring
Abstract
In this work, an electrochemical sensor based on iron oxide-reduced graphene oxide nanococmposite modified screen printed graphite electrode (Fe<sub>3</sub>O<sub>4</sub>-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<sup>-3</sup> M L<sup>-1</sup> NO<sub>2</sub>. 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<sup>-5</sup> M L<sup>-1</sup> with good selectivity in the concentration range 10<sup>-4</sup> - 10<sup>-3</sup> 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.
Event details
- Event
- tc19-2019