Preparation of Mg/Fe spinel ferrite nanoparticles from Mg/Fe-LDH microcrystallites under mild conditions

Mg/Fe spinel ferrite nanoparticles were prepared by aging Mg2+/Fe2+/Fe3+-LDH (layered double hydroxides) suspension at temperature below 100 °C. The yield of Mg/Fe spinel ferrite nanoparticles was dependent on the aging temperature and the molar ratio of ferrous ions in the LDH precursors. It was found that the majority of iron atoms was assembled into the lattice of spinel ferrite when the LDH precursors were aged at 95 °C for 18 h, and the formation of Mg/Fe spinel ferrite was favored with a higher molar ratio of ferrous ion in the LDH precursors. To the best knowledge of us, it is the first report on preparation of spinel ferrite under such a mild condition of below 100 °C from Mg2+/Fe2+/Fe3+-LDH microcrystallites.

Graphical abstractMg/Fe spinel ferrite nanoparticle was synthesized from LDH microcrystallites under 100 °C in open air. Results indicated that Mg/Fe spinel ferrite was formed with the aged temperature going up and the content of spinel ferrite in the product was increased with the Fe2+ increase in the original reactive mixtures.Figure optionsDownload full-size imageDownload as PowerPoint slide