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 (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:

  _unreg_tc19-2019.02

Event details:

• IMEKO TC:
• Event name:
• Title:
• Place:
• Time: