Electrocatalytic response of nitrogen-doped hollow carbon spheres modified glassy carbon electrode for sulphite detection in water

In this work, the glassy carbon electrode (GCE) surface was modified with nitrogen-doped hollow carbon spheres (N-HCSs) to achieve a new electrochemical sulphite sensor (N-HCSs/GCE) in water samples. The N-HCSs were explored for electrocatalytic behavior through voltammetric approaches using a routine three-electrode system. The findings revealed an admirable efficiency for modified electrodes towards sulphite oxidation, highlighting the effectiveness of our as-produced sulphite sensor. The differential pulse voltammetry was utilized under obtained optimal circumstances to study the as-developed sensor, the results of which underlined linear electrochemical current in relation to sulphite concentration, with dynamic range as wide as 1.0-100.0 j.1M and limit of detection as narrow as 0.35 j.1M. Moreover, N-HCSs/GCE had commendable practical applicability for sensing sulphite present in real specimens with voltammetric techniques.

Automated summary

In this study, a new electrochemical sulphite sensor was developed by modifying the glassy carbon electrode (GCE) surface with nitrogen-doped hollow carbon spheres (N-HCSs). The modified electrodes showed excellent efficiency for sulphite oxidation and were found to have a wide dynamic range and low detection limit. The practical applicability of the sensor for sensing sulphite in real specimens was also demonstrated.