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 x 10(-8) to 2.0 x 10(-5) mol/L and detection limit of honokiol as low as 8 x 10(-9) mol/L were obtained. This analysis method has a high recovery ratio of honokiol up to 103%. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.