▎ 摘　　要

In this work, reduced graphene oxide coated zinc oxide flower (ZnO-RGO) nanocomposite has been prepared via a simple one-pot hydrothermal synthesis method. The morphology and properties of the proposed ZnO-RGO were characterized using SEM, Raman and UV-VIS spectroscopy. Then, an ascorbic acid (AA) electrochemical sensor was prepared based on a glassy carbon electrode (GCE) modified with the ZnO-RGO nanocomposite. An advanced performance was recorded on the ZnO-RGO/GCE compared with that of the bare GCE, ZnO/GCE, and RGO/GCE. The proposed electrochemical sensor exhibited a wide linear detection from 5M to 2mM with a low detection limit of 1.2M. Further, the proposed AA electrochemical sensor showed a good repeatability, reproducibility and stability.