▎ 摘　　要

Herein CoO-Co-N-doped carbon nanoparticles decorated on reduced graphene oxide (CoO-Co-NC-rGO) has been successfully synthesized by using zeolitic imidazolate framework-67 loaded on graphene oxide (ZIF-67-GO) as precursor. The ZIF-67 could be in-situ prepared on GO through a simple wet-chemical method. Subsequently, an annealing treatment towards ZIF-67-GO has been utilized to obtain CoO-Co-NC-rGO. On the one hand, ZIF-67 could be pyrolyzed to form CoO-Co-N-doped carbon nanoparticles. On the other hand, GO could be reduced to form rGO in the annealing treatment. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) measurements showed CoO-Co-NC-rGO with two-dimensional nanosheets. Owing to the structural and compositional advantages of NC and rGO, the CoO-Co-NC-rGO exhibited excellent electro-catalytic activity for the oxidation of glucose. The established non-enzymatic glucose sensor based on CoO-Co-NC-rGO showed the linear detection range from 0.5 to 10.0 mu M, the detection limit of 0.34 mu M at a signal-to-noise ratio of 3, and the sensitivity of 3172 mu A mM(-1) cm(-2). (C) 2018 Elsevier B.V. All rights reserved.