화학공학소재연구정보센터
Journal of Electroanalytical Chemistry, Vol.845, 111-118, 2019
Chemical synthesis of nanosilver on chitosan and electroanalysis activity against the p-nitroaniline reduction
In this study, a material comprised of chitosan stabilized silver nanoparticles on the carbon paste electrode (CS-SNPs/CPE) is used as an electrochemically active material for the determination of p-nitroaniline (p-NA) in neutral medium by differential pulse voltammetry (DPV). A chemical process is used to synthesize silver nanoparticles using chitosan and sodium borohydride as stabilizer and reducing agent respectively at room temperature. Characterization of the end product using UV-Vis spectroscopy verified the presence of silver nano particles. The silver nanoparticles were shown to have an average size of 50 nm by X-ray diffraction analysis. The electrochemical characterization showed that the CS-SNPs/CPE exhibits high electroanalytic activity that can be harnessed for sensor construction and related applications. The as developed sensor exhibited a lower detection limit of 5 nM towards the p-NA reduction in the linear range of 7 nM to 1 mu M (R-2 = 0.986). The CS-SNPs/CPE was then extended for the determination of p-NA in real samples such as wastewater. All these studies confirmed that the chitosan stabilized silver nanoparticles on the carbon paste electrode are a potential candidate in the field of electrochemical sensing.