A non-enzymatic electrochemical hydrogen peroxide sensor based on Ag decorated boehmite nanotubes/reduced graphene oxide nanocomposites

The Ag/boehmite nanotubes/reduced graphene oxide nanocomposites (Ag/boehmite nanotubes/rGO) have been synthesized for enhanced electrochemical sensing of hydrogen peroxide (H2O2). Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction spectroscopy (XRD) were applied to characterize the composition and morphology of the nanocomposites. TEM and FESEM images revealed that a great deal of Ag nanoparticles with spherical morphologies were fixed on the surface of boehmite nanotubes/rGO. The sensor based on Ag/boehmite nanotubes/rGO nandcomposites possessed remarkable performance for the electrical reduction of H2O2. and showed a linear response for the detection of H2O2 in the range of 0.5 mu M-10.0 mM with a low detection limit of 0.17 mu M (S/N = 3) and a sensitivity of 80.1 mu A mM(-1) cm(-2). Besides, the as-prepared sensor exhibited outstanding anti-interference capability. Therefore, the excellent experimental results indicated that Ag/boehmite nanotubes/rGO nanocomposites is a promising type of support material for electrochemical detection of H2O2. (C) 2016 Elsevier B.V. All rights reserved.