Solid State Synthesis of Spinel-Type Metal Oxide Mg1.5Fe0.5MnO4 and Study of Its Exchange Capability for Li+

Abstract

The spinel-type composite metal oxide, magnesium-manganese-titanium oxide (Mg_1.5Fe_0.5MnO₄), was prepared by the method of solid state crystallization. As a spinel-type structure, it is versatile in chemical composition and its stoichiometric number. It could keep crystal structure stability by changing stoichiometric number method to insert or extract some substitutable ions. This characteristic can be special studied to meet some requirements. This spinel-type composite metal oxide was detected by XRD and SEM for the valuating partition coefficient of saturated exchange capacity and the other parameters to confirm certain characteristics. The dissolution rate of Fe²⁺ and Mn⁴⁺ from Mg_1.5Fe_0.5MnO₄ which was treated by acid were less than 9.3%, meanwhile the extraction rate of Mg²⁺ was more than 75%. The experimental data showed that the acidifying of MgFeMn-620 (H) can reach 12.1 mmol g^–1 ion exchange capacity for Li⁺ in solution.