Ferricoxychloride and hematite nanoparticles: Synthesis and phase transformation
Milonjić, Slobodan K.
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A synthetic procedure based on thermal hydrolysis of iron(III) chloride solutions for the preparation of hematite (alpha-Fe2O3) and ferricoxychloride (FeOCl) colloids consisting of nanoparticles (NPs) is described. Transmission electron microscopy indicated that both colloids consisted of particles smaller than 10 rim. X-ray diffraction measurements revealed transformation of FeOCl NPs into alpha-Fe2O3 NPs after a few months. The phase transformation was explained in terms of redissolution - recrystallization process. UV-vis spectroscopy was used for precise determination of the band gap of alpha-Fe2O3.
Keywords:ferricoxychloride / hematite / nanoparticles / phase transformation
Source:Materials Science Forum, 2006, 518, 63-66
- Recent Developments in Advanced Materials and Processes, 7th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS), Sep 12-16, 2005, Herceg Novi, Montenegro