▎ 摘　　要

We report the synthesis and characterization of polyaniline microtubes /Pt reduced N-graphene oxide (PAn MTs Pt N-rGO) nanocomposites in the presence of L-glutamine as a green reducing agent for the detection of mercury ions. Field emission scanning electron microscopy (FESEM) confirmed the presence of N-rGO, Pt NPs and PAn MTs while X-ray diffraction (XRD) results indicated that the Pt cations were completely reduced to metallic Pt. The electrochemical impedance spectroscopy (EIS) show that the conductivity and surface area were enhanced with the presence of PAn MTs and N-rGO. This increases the available surface area and enhances the dispersion of Pt NPs to prevent the agglomeration of Pt NPs. From the differential pulse voltammetry (DPV), a linear working range between 5 to 500 nM with a LOD of 0.758 nM (S/N = 3) was obtained. The sensitivity of this linear segment is 0.108 mu A nM(-1) cm(-2). [GRAPHICS]