| 초록 |
Processes for synthesizing magnetite (Fe3O4) nanoparticles have been extensively studied over the three decades due to the biomedical applicability. The coprecipitation method is the most convenient and eco-friendly way to synthesize magnetite nanoparticles from an aqueous iron salt (Fe2+ + Fe3+) solution. Many research groups described various phase transformations between iron oxide (hydroxide)s. However, all these studies covered only a small part of the entire transformation involving the coprecipitation reaction of magnetite. In the present study, we show the phase transformation of various intermediates of goethite, akaganeite and lepidocrocite. We propose a reaction scheme in which Fe2+ and Fe3+ have separate but interrelated pathways toward magnetite nanoparticles. |
