摘要
In the present work, Fe 3 O 4 /Polythiophene (Fe 3 O 4 /PT) hybrid nanocomposite was prepared by oxidative polymerization of thiophene over oleic acid-capped Fe 3 O 4 nanoparticles. The morphology, structure, and composition of the nanocomposite were characterized by transmission electronic microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TGA), X-ray powder diffraction (XRD), and superconducting quantum interference device (SQUID) magnetometry. The zero coercivity and reversible hysteresis behavior indicated the superparamagnetic nature of Fe 3 O 4 /PT nanocomposite at room temperature. The cyclic voltammetry and amperometry results showed that Fe 3 O 4 /PT nanocomposites have potential application in amperometic sensing of hydrogen peroxide. The sensitivity of the Fe 3 O 4 /PT NPs modified electrode towards hydrogen peroxide sensing was 3.1 μA mM −1 and the limit of detection was 5 μM.