RHBr/RGO composite material as an enhanced sensing platform can detect Cu2+ with high selectivity

This work reports a simple and efficient electrochemical detection method, using RHBr / RGO nanocomposite electrode material modified GCE to detect trace Cu2+. A simple and effective assembly method is used to prepare RHBr/RGO composite materials. After characterization by DPV and EIS, we discussed and optimized some factors that affect the detection of chemical sensors. Then DPV was used to evaluate the analytical performance of RHBr/RGO/GCE in the detection of Cu2+. Using optimal experimental factors, the linear response range of the sensor to Cu2+ concentration is 4×10−7~1×10−5 M, and the detection limit is 3.9 nM (S/N = 3).