Silver tungstate nanostructures: electrochemical synthesis and its statistical optimization

Abstract

Silver tungstate (Ag2WO4) nanoparticles were synthesized by a simple electrochemical method with the aid of silver electrode and sodium tungstate as starting reagents. In this study, synthesis conditions of silver tungstate nanoparticles were optimized by Taguchi robust design. Besides, the effects of several synthesis conditions such as tungstate ion concentration, applied voltage, stirring rate, and reaction temperature on the particle size of product were investigated by SEM images. Furthermore, the significance of these factors on the diameter of silver tungstate nanoparticles was evaluated by the analysis of variance and the optimum conditions for the preparation of silver tungstate nanoparticles by electrochemical method was investigated. The resulted nanoparticles were characterized by different routes, i.e., XRD, FTIR, SEM, and PL analysis. Also, the optical band gap corresponding to the resulted Ag2WO4 nanoparticles was predicted to be 2.75 eV.