Carbon-black-doped Polyimide-modified Glassy Carbon Electrode for Sensitive Nonenzymatic Amperometric Determination of Hydrogen Peroxide

Abstract

In this study, a novel nonenzymatic sensor for the determination of hydrogen peroxide (H 2 O 2) was developed. The direct electrocatalytic oxidation of H 2 O 2 in an aqueous medium at a carbon-black (CB)-doped self-made polyimide (PI)-modified glassy carbon electrode (GCE) was investigated. The fabrication of this electrode is simple and reproducible. The filmlike surface was prepared by directly mixing the CB and PI solution. Under optimized conditions, the linear range of H 2 O 2 is from 6 to 10000 µM with the detection limit of 1 µM. The electrode exhibited high stability, excellent sensitivity, stable reproducibility, and fast response time (less than 5 s). The results show that PI can be used as a reliable and long-life sensor for hydrogen peroxide detection, exhibiting a new application for the PI.

A Carbon‐Black‐Doped Molybdenite‐Based Electrochemical Sensor for Simultaneous Determination of Uric Acid, Dopamine, and Ascorbic Acid

“…The combination of CB and graphene oxide (GO) modified electrode offers excellent conductivity and magnificent electrochemical activity for determination of UA [33] . CB‐doped polyimide (PI)‐modified glassy carbon electrode provides good electrocatalytic activity and stability for the determination of hydrogen peroxide, [34] However, there is no report on the use of CB‐MLN modified electrode for the simultaneous determination of UA, DA, and AA.…”