▎ 摘　　要

In the present work, graphene oxide nanoribbons (GONRs) were synthesized via the longitudinal unzipping of multi-walled carbon nanotubes (MWCNTs) nanoparticles with the aid of strong oxidants. The MnO2/reduced graphene oxide Nanoribbons (MnO2/rGONRs) composites were successfully fabricated by means of a reproducible and single-step hydrothermal co-reduction of KMnO4 and GONRs. The morphology and composition of as-prepared materials were studied by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). The as-prepared MnO2/rGONRs were employed in fabricating a nonenzymatic electrochemical sensor for the sensitive detection of hydrogen peroxide (H2O2). The electrochemical properties of the MnO2/rGONRs modified glassy carbon electrode (MnO2/rGONRs/GCE) were studied by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The developed nonenzymatic electrochemical sensor exhibited well-defined amperometric response towards H2O2 in a wide linear range of 0.25-2245 mu M, and a detection limit of 0.071 mu M (S/N = 3) could be obtained. And the proposed sensor also displayed excellent electrochemical analytical performance, acceptable reproducibility, high accuracy, and great anti-interference ability. The proposed sensor was applied for the determination of H2O2 in real sample of fetal bovine serum (FBS), and acceptable accuracy and recovery could be obtained. (C) 2016 Elsevier B.V. All rights reserved.