磁性四氧化三铁纳米微粒的研究进展

Research Progress of Magnetic Fe3O4 Nanoparticles

磁性四氧化三铁(Fe3O4)纳米微粒体积小、比表面积大,具有表面效应和超顺磁性,人们可以通过对其表面的修饰,使其拥有特定的功能,在室温下通过外加磁场达到吸附分离的目的,其在生物医药、污水处理和催化剂载体等领域有着良好的应用前景。磁性Fe3O4纳米微粒的制备方法很多,以化学共沉淀法、水热法、微乳法、溶胶-凝胶法最为普遍。本文综述了磁性Fe3O4纳米微粒常用的制备方法和应用发展前景。

Magnetic Fe3O4 nanoparticles are small in size,large in specific surface area,with surface effect and super paramagnetism,people can modify their surface to make them have specific functions,which can be achieved by an external magnetic field at room temperature for the purpose of adsorption and separation,and they have good applica⁃tion prospects in the fields of biomedicine,sewage treatment and catalyst carrier.There are many methods for prepar⁃ing magnetic Fe3O4 nanoparticles,with chemical co-precipitation,hydrothermal,microemulsion,and sol-gel methods being the most common.This paper reviewed the commonly used preparation methods and application development prospects of magnetic Fe3O4 nanoparticles.