Electrochemical Performance of Polyaniline‐Polyvanadate‐Copper Nanomaterials for the Detection of Benzoic Acid

Abstract

AbstractThe introduction of nanomaterials as modified electrode materials into the field of electrochemical sensing is expected to improve the reliability, sensitivity, selectivity and repeatability of electrochemical sensors in detecting pollutants in the water environment. In this study, copper vanadate nanomaterials (Cu3V2O7(OH)2·2H2O, referred to as CVO) and Cu3V2O7(OH)2·2H2O/polyyaniline (PANI) composite nanomaterials (referred to as CVO/PANI) were successfully prepared and characterized by Fourier transform infrared spectrum (FTIR), X‐ray traveling‐action (XRD), scanning electron microscopy (SEM) and high‐resolution transmission electron microscopy (HR‐TEM).The modified glassy carbon electrodes (GCE) with these two materials were used for the detection of benzoic acid (BA) and exhibited excellent electrochemical sensing performance. The results show that two pairs of semi‐reversible redox peaks exist in both CVO and CVO/PANI modified glassy carbon electrode (GCE) in BA solution. The linear range of CVO and CVO/PANI nanomaterials‐modified GCE was 0.01‐2 mM and 0.001‐2 mM, and the limits of detection were 2.16 µM and 0.41 µM, respectively. Polyaniline plays important role in the electrochemical responses of BA at CVO/PANI modified GCE. PANI enhancedthe intensities of CV peaks and electrochemical determination ability for BA.This article is protected by copyright. All rights reserved