▎ 摘　　要

A facile synthesis strategy of reduced graphene oxide (RGO)-octahedral Mn3O4 (oct-Mn3O4) nanocomposites using in situ one-pot hydrothermal reaction was reported. The RGO-oct-Mn3O4 nanocomposites were drop-casted onto the surface of glassy carbon electrode (GCE) to obtain RGO-oct-Mn3O4/GCE. DPV results revealed that the performance of RGO-oct-Mn3O4/GCE towards metronidazole displayed a linear ranging from 0.1 to 9.5 mu M with a detection limit of 0.037 mu M. For sulfamonomethoxine, it exhibited a linear ranging from 1 to 95 mu M with a detection limit of 0.27 mu M. Moreover, the proposed sensor had good anti-interference capability, high stability, satisfactory reproducibility, and was successfully applied in real samples.