A Non-Enzyme Hydrogen Peroxide Biosensor Based on Fe3O4/RGO Nanocomposite Material

Abstract

A sensitive non-enzyme hydrogen peroxide (H2O2) sensor has been prepared based on Fe3O4/reduced graphene oxide (Fe3O4/RGO) nanocomposite material. The sensitivity of Fe3O4/RGO modified electrode toward the electrochemical reduction of H2O2 is higher than that of Fe3O4 or Fe3O4/GO modified electrodes. A linear range of H2O2 concentration is obtained from 5.0 × 10−7 to 3.0 × 10−3 M with a detection limit of 1.8 × 10−7 M (S/N=3). The Fe3O4/RGO modified electrode also exhibits high selectivity and stability in the detection of H2O2, which suggests that Fe3O4/RGO nanocomposite material provides a promising platform for the non-enzyme electrochemical sensor.