Sulphur-Doped Carbon Nanospheres Based Sensor for the Electrochemical Detection of Cadmium

Cadmium (Cd), popularly used in electroplating, batteries, and paints, is a well-recognized carcinogen and a toxic non-essential element for the human body. Hence, developing an effective sensor for detecting Cd (II) from water is a critical requirement. In this work, an electrochemical sensor based on green synthesized sulphur-doped carbon nanospheres (S-CNs) modified carbon paste electrode (S-CNs/CPE) has been developed that demonstrates a limit of detection (LOD) of ~14.4 μM towards Cd (II) in water using differential pulse voltammetry (DPV) technique. Interference studies and real sample analysis reveal the effectiveness of the developed S-CNs/CPE.