Nanodisperse oxide compounds of iron formed in the FeSO4 – KOH – H2O – H2O2 system (4.0 ≤ pH ≤ 13.0)

Abstract

The regularities of phase formation during oxidation of aqueous solutions of FeSO 4 and (or) suspensions of Fe(OH) 2 at quasi-constant temperature and pH values have been studied for wide intervals of temperature (20 -85• C) and (4.0 -13.0) of the reaction medium. The produced nanodisperse materials have been examined by X-ray phase analysis, IR spectroscopy, scanning electron microscopy and X-ray fluorescence analysis, as well as by thermogravimetric analysis combined with thermal analysis and mass spectrometric analysis of released gases. The dependences of the phase, chemical and disperse compositions of the formed precipitates on the synthesis parameters have been revealed.

Successive ionic layer deposition of Fe3O4HxMoO4nH2O composite nanolayers and their superparamagnetic properties

“…Iron oxides particles are prepared with solid-state reactions [1], coprecipitation from solutions [2], hydrothermal treatment [3][4][5], oxidation of solutions of iron (II) salt [6], combustion method [7] and etc. Iron oxides in nano-scale have a great potential for their applications as ion exchangers, adsorbents, catalytic materials, magnetic data storage devices, superparamagnetic materials and etc.…”