A Sensitive Electrochemical Sensor Based on Co3O4‐CeO2 Composites Modified Glassy Carbon Electrode for the Determination of Bisphenol A. Issue 11 (18th March 2022)

• Record Type: Journal Article
• Authors: Yang, Qin; Chen, Ninghua; Zhang, Xuefeng; Ye, Zhixiang; Yang, Yingchun
• Is Part Of: ChemistrySelect. Volume 7:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-18
• Subjects: Co3O4-CeO2 composites -- modified glass carbon electrode -- electrochemical sensor -- bisphenol A; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202104513
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A novel electrochemical bisphenol A (BPA) sensor based on Co3 O4 ‐CeO2 composites modified glassy carbon electrode (Co3 O4 ‐CeO2 /GCE) was prepared in this study. Co3 O4 ‐CeO2 composites were easily prepared by sol‐gel combustion method, and their morphology and structure were characterized by scanning electron microscope (SEM), X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). The electrochemical behavior of BPA on the modified electrode was investigated by cyclic voltammetry (CV), and an irreversible oxidation peak appeared at 0.598 V (pH=6). Also the effects of scan rate and pH on electron transfer efficiency of electrode were investigated by CV method. In order to reduce background interference and improve sensitivity, the limit of detection (LOD) and BPA of samples were detected by differential pulse voltammetry (DPV). The results showed there is a wide linear range of 0.033 μM∼30.3 μM with LOD of 0.0048 μM (S/N=3) for the constructed electrochemical sensor. It was successful used for the determination of BPA in real samples with satisfied results (the recoveries were between 99.2 % and 101.2 %). The fabricated Co3 O4 ‐CeO2 /GCE‐based sensors exhibited excellent electrochemical performance of BPA, so it could provide an alternative platform for the determination of BPA in the environment. Abstract : Co3 O4 ‐CeO2 modified glassy carbon electrode (Co3 O4 ‐CeO2 /GCE) as an electrochemical sensor for determination of bisphenol A with superb sensitivity. Under optimal test conditions, the sensor exhibits a broad linear range (0.033∼30.3 μM), a low detection limit (0.0048 μM) and excellent reproducibility and stability.