Electrochemical detection of dopamine using green and chemical synthesized CuO/PANI nanocomposite modified electrode
Seleke J. Mokole, Ahmed Aliyu, Omolola E. Fayemi
Abstract
Abstract Copper oxide (CuO) nanoparticles were synthesized using the chemical and green method routes and doped with polyaniline (PANI) to form PANI/CuO ch and PANI/CuO gr nanocomposite. The microstructural properties of the nanocomposites were characterized by UV–Vis spectroscopy (UV), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy (EDS) detector. The electrochemical behavior of the CuO ch , CuO gr , PANI/CuO ch , and PANI/CuO gr electrodes was investigated using cyclic voltammetry (CV), and square wave voltammetry (SWV), and the results showed an enhanced electrochemical catalytic activity toward dopamine (DA) on PANI/CuO gr electrodes. SWV was conducted for the determination of DA with a linear range from 26 to 95 μM and a low limit of detection (LOD) of 8.22 μM. A comparison between the PANI/CuO ch and PANI/CuO gr electrodes and other modified electrodes toward detection of DA are comparable with the reported literature results.