Abstract:

Supercritical fluid has been proved to have wide prospects in many fields because of its unique characteristics such as low viscosity，high density and excellent performance of mass transfer. Magnetic iron oxide nanoparticles have remarkably potential applications in many fields such as magnetic fluids，biomedicine，catalysis，electronics and so on. In this paper，the research progresses，research focuses and main problems of preparation of magnetic iron oxide nanoparticles by supercritical fluid technology，including rapid expansion of supercritical solutions（RESS），supercritical anti-solvent processes（SAS），sol-gel supercritical fluid drying and supercritical hydrothermal synthesis are reviewed. The future direction is also suggested.