Ferrihydrite gels derived in the Fe(NO3)39H2O C2H5OH-CH3CHCH2O ternary system

A study of gel formation in iron(III) nitrate nonahydrate (Fe(NO3)3*9H2O)--ethanol (C2H5OH)--1,2--epoxypropane (propylene oxide (CH3CHCH2O)) ternary system has been performed. The phase boundaries for existing ferrihydrite gels were determined. It was shown that this ternary system has two different...

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Veröffentlicht in:	Journal of non-crystalline solids 2005-06, Vol.351 (16-17), p.1426-1432
Hauptverfasser:	TALANTSEV, Evgueni F, PANTOYA, Michelle L, CAMAGONG, Cristina, LAHLOUH, Bashar, NICOLICH, Steven M, GANGOPADHYAY, Shubhra
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Colloidal state and disperse state Exact sciences and technology General and physical chemistry General, apparatus, technics of preparation
Online-Zugang:	Volltext
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Zusammenfassung:	A study of gel formation in iron(III) nitrate nonahydrate (Fe(NO3)3*9H2O)--ethanol (C2H5OH)--1,2--epoxypropane (propylene oxide (CH3CHCH2O)) ternary system has been performed. The phase boundaries for existing ferrihydrite gels were determined. It was shown that this ternary system has two different types of ferrihydrite gel phases. The dominant chemical bonds of these phases were investigated by Fourier transform infrared spectroscopy (FTIR). Both ferrihydrite phases transform to amorphous alpha--FeOOH phase after 6h annealing at T=300 deg C. The temperatures of crystallization from these amorphous alpha--FeOOH phases to alpha--Fe2O3 phases were found.
ISSN:	0022-3093 1873-4812
DOI:	10.1016/j.jnoncrysol.2005.03.038