INFLUENCE OF MAGNETITE STOICHIOMETRY ON Fe(II) UPTAKE AND NITROAROMATIC REDUCTION

摘要

Magnetite (Fe3O4) is an iron oxide that contains both Fe(II) and Fe(III), with Fe(II)/Fe(III) = 0.5. It is a common constituent of soils, an important industrial ore and a product of iron-respiring bacteria. Magnetite has an inverse spinel structure, which provides unique electronic and magnetic properties. Maghemite (γ-Fe2O3) is an oxidation product of magnetite and contains only Fe(III). Maghemite is isostructural with magnetite, which makes distinguishing between the two phases challenging. Magnetite and maghemite phases can coexist as a solid solution, with this phase referred to hereafter as 'partially oxidized magnetite,' where 0 < Fe(II)/Fe(III) < 0.5.