▎ 摘 要
An electrochemical nitrite sensor based on electrochemically reduced holey graphene (ERHG) was fabricated in this study. An abundant of nanopores were observed on the basal plane of the ERHG, and, with the aid of in-plane pores, many more exposed edge plane and a high density of defects were found. Both these phenomena can significantly improve the electron transfer and mass transport of electrodes. The ERHG-modified electrode showed superior electrocatalytic activity toward nitrites with a wide linear range, high sensitivity, and a low detection limit. Furthermore, the ERHG nitrite sensor showed excellent anti-interference ability and reproducibility, long-term stability, and fulfilled requirements for application to real samples. (C) 2018 Elsevier B.V. All rights reserved.