Preparation of nano-Fe_xO_y by thermal decomposition method and morphology research

摘要

Nano-Fe_xO_y (including γ-Fe_2O_3, α-Fe_2O_3 and Fe_3O_4) particles were prepared by acetylacetonate iron [Fe(C_5H_7O_2)_3] thermal decomposition under air condition at low temperature. X-ray diffusion (XRD), transmission electron microscopy (TEM), electron diffraction pattern (EDP), and specific surface area were carried out to characterized these nanoparticles. The influencing factors of experiment were discussed and studied, and the results show that γ-Fe_2O_3, α-Fe_2O_3 and Fe_3O_4 in different morphology can be obtained respectively by controlling the experiment conditions. The primary particle of Fe_3O_4 is about 16 nm; the primary particle of γ- Fe_2O_3 is about 20 nm and arranges compact. The second nanoparticle of γ- Fe_2O_3 presents catenarian and has the tendency to form an close space.