Synthesis and properties of mesoporous maghemite

Abstract

Mesoporous maghemite (γ-Fe2O3), obtained by thermal decomposition of iron citrate xerogel hydrate, was investigated by X-ray di raction, scanning electron microscopy, the M ssbauer and impedance spectroscopies and low temperature nitrogen adsorption. The influence of precursor molar concentration on the material morphology, crystalline and magnetic microstructures and electric conductivity was studied. Obtained results open up the possibility for synthesis of ultrafine γ-Fe2O3 with controlled structural and morphological characteristics.