Simple sonochemical synthesis of SrCuO2 assisted GCN nanocomposite for the sensitive electrochemical detection of 4-AAP

Abstract

The present study demonstrates the development of an electrochemical sensor to detect and quantify 4- Aminoantipyrene (4-AAP), using strontium copper oxide (SrCuO2) microspheres and graphitic carbon nitride (GCN) as a composite in the modified graphite electrode. The SrCuO2 is synthesized by sonochemical method and GCN was prepared using pyrolysis method. Field emission scanning electron microscopy (FESEM), X-ray diffraction spectroscopy (XRD) techniques are used in the characterization of the synthesized materials. Subsequently, the well characterized GCN and SrCuO2 are deposited onto a graphite (Gr) surface and used as transducer material in the fabrication of the electrode. Electrochemical characterization of the as fabricated electrode was carried out with the help of electrochemical impedance spectroscopy (EIS). The results validated the conducting nature of SrCuO2 and GCN. In Comparison with the unmodified electrode, the proposed Gr/SrCuO2/GCN electrochemical sensor, displayed enhanced electrocatalytic behavior towards 4-AAP. The sensor's analytical performance is calibrated and evaluated by cyclic voltammetry (CV) and Differential pulse voltammetry (DPV). The sensor exhibited exceptional characteristics like wide linear range, low detection limit. In addition, the proposed sensor also showed an excellent repeatability, good reproducibility and superior stability. Finally, the real sample analysis results indicated an acceptable recovery range that endeavored the use of the proposed sensor to monitor 4-AAP.