Determination of heavy metals in water using an FTO electrode modified with CeO/rGO nanoribbons prepared by an electrochemical method.

The rGO/CeO/FTO nanocomposite modified electrode was prepared by an electrochemical method. A simple and highly sensitive electrochemical sensing platform for electrochemical rGO and modified CeO nanoribbons directly on FTO electrodes was developed. Simultaneous determination of Pb and Cd used the differential pulse anodic stripping voltammetry (DPASV) method. The method was simple to operate, and CeO nanobelts could be obtained simultaneously by electrodeposition and reduction of GO without further processing. This is an environmentally friendly electrochemical method to obtain modified electrodes under mild conditions. The experimental results showed that the linear calibration curves of Pb and Cd are 1-300 and 0.2-500 μg L, respectively. At the same time, no interference from other coexisting metal ions was found during the detection process, which proved that the modified electrode had good stability and repeatability.