A Non-Enzyme Hydrogen Peroxide Biosensor Based on Fe_3O_4/RGO Nanocomposite Material

摘要

A sensitive non-enzyme hydrogen peroxide (H_2O_2) sensor has been prepared based on Fe_3O_4/reduced grapheme nanocomposite material. The sensitivity of Fe_3O_4/RGO modified electrode toward the electrochemical reduction of H_2O_2 is higher than that of Fe_3O_4 or Fe_3O_4/GO modified electrodes. A linear range of H_2O_2 concentration is obtained from 5.0×10~(-7) to 3.0 ×10~(-3) M with a detection limit of 1.8 x 10"7 M (S/N=3). The Fe_3O_4/RGO modified electrode also exhibits high selectivity and stability in the detection of H_2O_2, which suggests that Fe_3O_4/RGO nanocomposite material provides a promising platform for the non-enzyme electrochemical sensor.