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.

摘要：

超临界流体以其低黏度、高密度、优异的传递性质等在许多领域具有广阔的应用前景。纳米磁性氧化铁微粒在磁性液体、生物医学、催化、电子等许多领域极具应用价值。本文主要综述了超临界流体技术包括超临界溶液快速膨胀法、超临界反溶剂法、超临界干燥法和超临界水热合成法等用于纳米磁性氧化铁制备的国内外研究概况、研究重点以及存在的主要问题，并提出了今后的研究方向。