Design and Fabrication of Silver Nanoparticles Doped Β-Cyclodextrin-chitosan Functionalized Graphene Nanocomposite Modified Electrode for Determination of Cu(II)

Introduction In this study, a nanocomposite film was prepared by doping silver nanoparticles onto beta-cyclodextrin-chitosan functionalized Reduced Graphene Oxide (RGO), denoted as Ag/ beta-CD/CS/G nanocomposite. The average diameter of the Ag NPs was found to be 62 +/- 17 nm. Methods The fabricated composite was applied to monitor trace levels of copper ions in different industrial and environmental water samples. The morphology and microstructure of the fabricated sensor were extensively investigated using different techniques, including XRD, TGA, HR-TEM, FTIR, SEM, XPS, and EDX physicochemical techniques. For the electrochemical monitoring of Cu(II), the Ag/beta-CD/CS/G nanocomposite electrode showed remarkable performance in terms of high sensitivity and a low limit of detection that was found to be 0.24 nmol L-1. Results The developed sensors showed a linear dynamic range from 10(-3) to 10(-8) mol L-1 with an R-2 of 0.99. The impacts of different electrochemical parameters, including medium pH, scanning rate, and interfering ions, were investigated. Conclusion Furthermore, the fabricated modified electrode showed high efficiency for Cu(II) detection in groundwater samples.