▎ 摘　　要

By using dopamine (DA) as a functionalized and linked agent, a novel nanohybrid nitrogen-doped carbon black/reduced graphene oxide (NCB/rGO) was prepared successfully via a green three-step process in this work, and then, NCB/rGO was applied in the field of electrochemical sensing through introducing the case of simultaneous determination of two pollutants, hydroquinone (HQ) and paracetamol (PCM). The produced NCB/rGO was characterized by various technologies including transmission electron microscopy, X-ray diffraction, Raman spectroscopy and electrochemical method. Owing to the synergetic advantages from each component in nanohybrids, the results showed that the NCB/rGO nanohybrids can exhibit excellent electrochemical sensing performances and the responsive peak current of HQ and PCM at NCB/rGO electrode are similar to 3.2 and 23.0 times as high as those at single CB and rGO electrode, respectively. After optimizing the detection conditions, the analytical responses of NCB/rGO modified electrode has a linear range between 0.05 and 20.0 mu M for both targets with low detection limit (16.5 nM for HQ and 26.2 nM for PCM). It's believed that the developed NCB/rGO novel nanohybrids will have important applications in electrochemical sensing of HQ and PCM as well as many other analytes. (C) 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.