Simultaneous Determination of Hydroquinone, and Catechol Using a Multi-Walled Carbon Nanotube/GC Electrode Modified by Electrodeposition of Carbon Nanodots

Herein, in order to detect hydroquinone (HQ) and catechol (CC) simultaneously, an electrochemical sensor with good selectivity and sensitivity was developed. It is constructed by electrodeposition of carbon nanodots (CDs) on the surface of multi-walled carbon nanotubes (MWNTs) doped glassy carbon electrode. First, the experimental parameter was optimized. The electrochemical behavior was then evaluated by electrochemical impedance spectroscopy and cyclic voltammetry. The linear range for HQ and CC was 0.1-200 mu M, and the detection limit was 0.03 mu M. Incorporated the large surface area and fast charge transfer of MWNTs and CDs with electrodeposition technology's stability, high excellent selectivity, sensitivity, stability and good reproducibility was exhibited by the fabricated sensor. Furthermore, the electrode was successfully used to determine the concentration of HQ and CC in tap water, and thus exhibited potential applications environment monitoring.