Simultaneous Detection of Sulfite and Nitrite on Graphene Oxide Nanoribbons‐gold Nanoparticles Composite Modified Electrode

Abstract

AbstractGraphene oxide nanoribbons (GONRs) have abundant oxygen‐containing functional groups and exhibit the improved dispersibility and biocompatibility. Unzipping of multi‐walled carbon nanotubes (MWCNTs) was used for the fabrication of GONRs in this work. A glassy carbon electrode modified with GONRs and gold nanoparticles, GCE/GONRs−AuNPs, was prepared via a two‐step approach and it exerted a high catalytic activity for the electrochemical oxidation of SO32− and NO2−. Under the optimum experimental conditions, the sensitive electrochemical detection of SO32− and NO2− was realized. The developed sensor exhibited a good selectivity, excellent reproducibility, satisfactory stability and high accuracy.