Electrochemical sensor based on glassy carbon electrode modified with copper vanadate nanobelts for detection of benzoic acid

Abstract

The copper vanadate nanobelts have been used as the materials modifying glassy carbon electrode (GCE) for the electrochemical detection of benzoic acid (BA). Two pairs of electrochemical cyclic voltammogram (CV) peaks are observed with anodic peak potentials at 0.13 and −0.06 V. The intensities of the electrochemical CV peaks have a positive linear correlation with the BA concentration and scan rate. The linear range is 0.001–2 mM and the detection limit is 0.61 μM, 1.21 μM at a signal-to-noise ratio of 3 for cvp1 and cvp2, respectively. The intensities of the CV peaks of BA at the GCE modified with copper vanadate nanobelts increase with the decrease of the pH value in acidic solution. The GCE modified with copper vanadate nanobelts exhibits good stability and reproducibility.