Formation Mechanism of Monodispersed α-Fe2O3Particles in Dilute FeCl3Solutions

摘要: Some ambiguity is still involved in the interpretation of growth mechanism monodispersed hematite (alpha-Fe2O3) particles dilute FeCl3 solutions. Namely, there are two entirely different proposals on this issue, viz. aggregation preformed primary alpha-Fe2O3 itself and reprecipitation ionic species through dissolution beta-FeOOH particles. In order to resolve problem, formation process was followed detail TEM, Electron Diffraction, XRD, FT-IR, ICP spectrometry along with quantitative analyses seed effects. As a result, it has been concluded that nuclei initially generated they grown by deposition solute originally present solution phase indirectly furnished from dissolution. concentration lowered particles, continue grow provided mainly steady-state alpha-Fe2O3. The basic common ellipsoidal presence phosphate ions spherical their absence.