▎ 摘　　要

The decoration of reduced graphene oxide with copper selenide (CuSe@rGO) was carried out under supercritical carbon dioxide (sc-CO2). Sc-CO2 has gas-like diffusivity, extremely low viscosity, and excellent penetration ability, allowing it to reduce graphene oxide (GO) and debundle reduced graphene oxide (rGO) sheets to disperse CuSe nanoparticles in between. The synthesized nanomaterials, GO, rGO, CuSe@GO and CuSe@rGO were characterized and utilized to modify glassy carbon electrode (GCE) to improve electrochemical detection of eugenol. Using CuSe@rGO/GCE, a linear range between 1 mu g/kg to 82 mu g/kg, limit of detection of 0.41 mu g/kg, and recoveries between 88.50% and 94.86% were obtained. These parameters represented a minimal 2-fold increase in sensitivity in comparison with the use of GCE, CuSe/GCE, GO/GCE, and rGO/GCE. The present work is meaningful to expand decorated graphene composites to sensor fields and promote the development of eugenol sensors in various samples. (C) 2019 Elsevier B.V. All rights reserved.