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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

Šarić, Ankica ; Musić, Svetozar ; Nomura, Kiyoshi ; Popović, Stanko FT-IR and 57Fe Moessbauer spectroscopic investigation of oxide phases precipitated from Fe(NO3)3 solutions // Journal of molecular structure, 480-481 (1999), 633-636. doi: 10.1016/S0022-2860(98)00829-1

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

Povezanost rada

Kemija

Poveznice
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