A facile synthesis of reduced graphene oxide-wrapped WO3 nanowire composite and its enhanced electrochemical catalysis properties

Uniform reduced graphene oxide-wrapped WO3 nanowire nanocomposite (RGO–WO3 nanowire) was prepared by a one-step solvothermal method. The resulting RGO–WO3 nanowire was first characterized by using FT-IR, XRD, AFM and SEM, and then was used to modify the glassy carbon electrode (GCE). The electrochemical behavior of honokiol on the unmodified GCE, WO3 nanowire modified GCE and RGO–WO3 nanowire modified GCE was compared. The RGO–WO3 nanowire composite has remarkably enhanced the electrochemical character of honokiol, with a significantly improved current value of oxidation peak in the composite modified GCE. After 2-min under open circuit, a linear range from 1.0×10−8 to 2.0×10−5 mol/L and detection limit of honokiol as low as 8×10−9 mol/L were obtained. This analysis method has a high recovery ratio of honokiol up to 103%.