Electrochemical behaviors of benzoic acid at polyaniline/CuGeO3 nanowire modified glassy carbon electrode

20 wt.% polyaniline/CuGeO3 nanowires have been used as glassy carbon electrode (GCE) modified materials for electrochemical determination of benzoic acid (BA) in neutral solution. The intensities of the anodic cyclic voltammogram (CV) peaks increase linearly with the increase of BA concentration and scan rate. The linear range is 0.001-2 mM and detection limit is 0.96 μM and 0.47 μM for cvp1 and cvp2, respectively at a signal-to-noise ratio of 3. 20 wt.% polyaniline/CuGeO3 nanowire modified GCE exhibits good stability and reproducibility. Polyaniline plays an important role in the electrochemical responses of BA at polyaniline/CuGeO3 nanowire modified GCE. The detection limit decreases to 0.64 μM and 0.28 μM for cvp1 and cvp2, respectively with the polyaniline content increasing to 40 wt.%. Polyaniline/CuGeO3 nanowire modified GCE exhibit better electrochemical performance than traditional methods.