Ionic liquids (ILs) are kinds of important solvents with unique properties of good ionic conductivity, high viscosity, low toxicity, negligible vapor pressure, high chemical and thermal stability [1]. Hence, it has been widely applied in electrochemistry. On the other hand, carbon nanotubes (CNTs) have been receiving considerable attention in various areas due to their unique mechanical, electrical and chemical properties [2]. Due to non-covalent (π-π) interactions between the loop of imidazole IL and the π electron of CNTs, combination of IL and CNTs could provide an outstanding synergistic increase presentation like good electronic and ionic conductivity, high electro chemical stability, and good biocompatibility [3]. Herein, Mn-MWCNTs nanohybrid was prepared by mixing a suspension of MWCNTs and Mn(OAc)2 followed by reduction with hydrazine monohydrate in alkaline solution. Then, a homogenous mixture of the hybrid, paraffin oil, graphite powder and IL was used for construction of a novel electrochemical sensor for determination of paracetamol at phosphate buffer solution (pH=7.0). The obtained results showed that on the Mn- MWCNT/IL/CPE, the oxidation peak potential shifted to more negative directions with a higher oxidation peak current than that the CPE attributing to the presence of IL as the binder/modifier due to higher conductivity, fast electron transfer rate, good anti-fouling properties, intrinsic catalytic ability and adsorptive behavior.
