Simple Synthesis and Characterization of BaFe12O19/Fe3O4 and Investigation of Electrochemical Properties

A novel and facile approach for preparing BaFe12O19/Fe3O4 nanostructures was developed utilizing the ultrasonic assisted method. The BaFe12O19/Fe3O4 nanostructures were studied by FT-IR spectroscopy, Transmission electron microscopy (TEM), and X-ray diffraction (XRD). XRD results showed that the BaFe12O19/Fe3O4 nanostructures are in good crystalline with average size of 18 nm. The carbon paste electrode modified with iron oxide nanoparticles were used as an electrochemical sensor for determination of sildenafil in an aqueous medium. The electrochemical properties of the prepared sensor was evaluated by the cyclic voltammetric and electrochemical impedance spectrometry techniques. The relationship between the current and concentration of sildenafil obtained using differential pulse voltammetry was linear in the 1-100 μM region and limit of detection was 0.1 μM.