The Influence of KCl on Electrocrystallized Iron Oxide Nanoparticles

Magnetite nanoparticles were synthesized by electrocrystallization in the presence of KCl as an inorganicadditive. The synthesis was performed in an electrochemical cell containing two iron electrodes with an aqueoussolution of sodium butanoate and sodium sulfate as electrolyte. The effects of KCl concentration on particle size,morphology, structure and magnetic properties were investigated. The magnetite nanoparticles were characterized byX-ray diffraction, electron microscopy, and magnetometry. When the synthesis is performed in the absence of KCl, aparamagnetic ferric salt is obtained as a second phase; it is possible to avoid formation of this phase, increase thespecific magnetization and improve the structure of the oxide particles by adding KCl in the electrolyte. SEM imagesshow the mean particle size increases from 36 nm to 70 nm by increasing the KCl concentration from 0 to 0.03 M.Room-temperature magnetization range from 45 to 84 Am2kg−1, depending on KCl concentration and particle size.

کلیدواژه ها:

Magnetite nanoparticles ، Electrocrystallization ، KCl ، Magnetization ، Structural properties