Direct sono electrochemical method for synthesizing Fe3O4 nanoparticles

Abstract

The direct sonoelectrochemical method is a new combination of electrochemical and ultrasonic synthesis, in which an iron rod is used as both an ultrasound probe and a sacrificial anode. In the specified pulse of time, the iron oxide nanoparticles are synthesized during the electrolysis process, and in the subsequent time pulse, ultrasound radiation dissociates the Fe3O4 magnetic nanoparticles from the surface. In this paper, iron oxide nanoparticles have been synthesized and characterized by conventional electrochemical and direct sonoelectrochemical methods under low and high current density. The results showed that the use of the direct sonoelectrochemical method could increase the synthesis rate up to 15-fold without altering the purity and phase of the nanoparticles. In the direct sonoelectrochemical method, smaller nanoparticles have been produced. The saturation magnetization in the sonoelectrochemical method is 24.9% and 7.9% more than the conventional electrochemical method at high and low current densities, respectively. Also, the coercivity value in the sonoelectrochemical method is 40.27% and 64.54% lower than the conventional electrochemical method at high and low current densities, respectively.