A Simple One-Pot Self-Assembly Route to Nanoporous and Monodispersed Fe₃O₄ Particles with Oriented Attachment Structure and Magnetic Property

Nanoporous and monodispersed Fe 3 O 4 aggregated spheres with high surface area and oriented attachment structure have been successfully prepared by a polyol reduction process. The structure and morphology of the Fe 3 O 4 particles were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and N 2 adsorption−desorption technique. The spherical aggregates are formed by the assembling among the Fe 3 O 4 primary nanoparticles (5 nm), and the average size of the spherical particles is around 100 nm. The nanopores are less than 3 nm in the aggregated spheres. Besides, the magnetic properties of these nanoporous particles are also investigated and the magnetization saturation value is about 42.8 emu/g.