Govindasamy Mani¹, Sea-Fue Mani¹; ¹National Taipei University of Technology

Bimetal-telluride nanorods decorated reduced graphene oxide nanocomposite has been developed for the detection of toxic drug (roxarsone). The electrochemical behavior of roxarsone on the FeBiTe3/rGO film modified electrode was investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Moreover, the obtained results confirmed its efficiency for sensing of roxarsone. In addition, the synthesized FeBiTe3/rGO nanocomposite was characterized by XRD, XPS, FESEM, HRTEM, EDS and EIS. Then, the optimization of some effective parameters on the electrochemical method efficiency including effect of scan rate, various pH and effect of concentrations. Furthermore, benefiting from their FeBiTe3/rGO uniqueness, a selective roxarsone sensor based on FeBiTe3/rGO/SPCE was developed. The nanocomposite modified SPCE presents higher electrochemical performance towards the electrocatalysis of roxarsone, such as wider linear range, lower detection limit and high sensitivity. Finally, the FeBiTe3/rGO modified SPCEs were successfully applied to detect roxarsone in various food samples with high accuracy.