Monodisperse Magnetite Nanoparticles Synthesis and Their Thermal-stability
Monodisperse magnetite (Fe3O4) nanoparticles (MNPs)of 25±5 nm were prepared by modified chemical co-precipitation,and they were characterized by X-ray powder diffraction (XRD),scanning electron microscopy (SEM) with the energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM),thermogravimetry analysis (TGA), X-ray photoelectron spectroscopy (XPS) and magnetic property measurement system (MPMS). The MNPs properties and structure were investigated thoroughly, particularly for their thermal-stability after different drying treatments. The results revealed that the nanoparticles after vacuum drying tended to agglomerate more easily than others when the grain average diameter was decreased because of the evaporation of the surface and inter-particles adsorptive water, but the structure and morphology were maintained better than others after ambient air drying. Among all samples, the magnetic property was maintained best at T=70℃. The results provide some physicochemical perspective between nanoparticles structure and property under thermal treatments.
magnetite nanoparticles synthesis drying agglomeration thermal-stability adsorptive water
Quanguo He Shengwen Guo Wei Wu Rong Hu Jingke Huang Quanguo He
Institute of Optoelectronic Materials and Devices South China University of Technology Guangzhou, P. Green Packaging & Biological Nanotechnology Laboratory Hunan University of Technology Zhuzhou, P.R.C
国际会议
武汉
英文
1133-1136
2007-07-06（万方平台首次上网日期，不代表论文的发表时间）