Abstract
Modified Fe2O3 nanoparticles were obtained by a conventional solid-phase method with different additions of sodium lignosulfonate (SLS) and calcining temperatures. The microstructures and morphologies of the synthesized Fe2O3 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric/differential scanning calorimetry (TG/DSC) analysis, Fourier transform infrared spectroscopy (FT-IR) and surface area and porosity analyzer (BET). The results indicate that the fine Fe2O3 particles with uniform morphology were gained (1.0 g SLS, calcined 400 °C). Then, the as-prepared Fe2O3 nanoparticle, along with graphene (G), was immobilized on the surface of glassy carbon electrode (GCE) by a bridge constituted of chitosan (CS) for further electrochemical measurement of cyclic voltammetry and chronoamperometry. The prepared G-Fe2O3-CS/GCE with the above-mentioned fine Fe2O3 particles (1.0 g SLS, calcined 400 °C) displayed high sensitivity (84.32 μA mM–1 cm–2), wide detecti...
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