▎ 摘　　要

In this paper, we present a novel, reliable and sensitive electrochemical sensor for the determination of paracetamol based on hollow carbon Co3O4 nanosheets/reduced graphene oxide composite (Co3O4/r-GO). The Co3O4/r-GO was prepared via a rapid one-step microwave solvothermal process. Some series of techniques that included scanning electron microscopy, X-ray diffraction and Raman were carried out to characterize the morphology and structure of as-prepared materials. Most importantly, the developed electrochemical sensor exhibited a wide linear range of 0.05 to 900.0 mu M and a low detection limit of 14.0 nM (S/N = 3) by using differential pulse voltammetry. Furthermore, the selectivity, repeatability, stability and practical applicability were further studied with satisfactory results.