FT-IR and 57Fe Moessbauer spectroscopic investigation of oxide phases precipitated from Fe(NO3)3 solutions (CROSBI ID 85862)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Šarić, Ankica ; Musić, Svetozar ; Nomura, Kiyoshi ; Popović, Stanko
engleski
FT-IR and 57Fe Moessbauer spectroscopic investigation of oxide phases precipitated from Fe(NO3)3 solutions
Iron oxides (group name) were precipitated by the hydrolysis of Fe(NO3)3 solutions in the presence of urotropin (hexamethylenetetramine). In an acidic medium at elevated temperature, urotropin undergoes hydrolysis with a gradual release of OH ions. The precipitation time varied between 5 hours and 21 days. The typical IR bands of the iron oxide phases were identified and used, together with XRD, to monitor phase changes in the precipitates. At the beginning of the precipitation process an amorphous phase was dominant and with prolonged time of Fe hydrolysis a-FeOOH was formed. a-FeOOH transformed to a-Fe2O3 by the dissolution/reprecipitation mechanism. The concentration effect of urotropin on the phase composition of the precipitates after 7 days of aging was observed with XRD, FT-IR and 57Fe Mössbauer spectroscopies.
Fe3+ hydrolysis ; urotropin ; α-FeOOH ; α-Fe2O3 ; FT-IR ; 57Fe Mössbauer ; XRD
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Podaci o izdanju
480-481
1999.
633-636
objavljeno
0022-2860
1872-8014
10.1016/S0022-2860(98)00829-1