“…Magnetite may be synthetically prepared by several experimental techniques, such as precipitation from mixtures of ferric and ferrous ions in an alkaline medium, oxidation of ferrous ion from ferrous hydroxide solutions, interaction of ferrous ions with hydrated iron oxide solutions or decomposition of organic precursors. Although chemical coprecipitation methods are widely used to the synthesis of ferrites nanoparticles [2,3,[6][7][8][9][10], others important experimental techniques also deserve attention, such as hydrothermal [11,12], sonochemical [13,14], sol-gel [15,16], solvothermal [17][18][19], flow injection in tubular nanoreactors and electrochemical [20], aerosol [21] and precipitation from water-in-oil microemulsions [22].…”