Naslov
Structural properties of precipitates formed by hydrolysis of Fe3+ ions in aqueous solutions containing NO3- and Cl- ions

Autori
Gotić, Marijan ; Popović, Stanko ; Ljubešić, Nikola ; Musić, Svetozar

Izvornik
Journal of materials science (0022-2461) 29 (1994), 9; 2474-2480

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
α-FeOOH ; α-Fe2O3 ; β-FeOOH ; Iron oxides precipitates ; Aqueous solutions ; Chloride ions ; Nitrate ions ; Hydrolysis ;

Sažetak
The structural properties of precipitates formed by hydrolysis of Fe3+ ions in aqueous solutions, containing N03-and Cl- ions, were investigated. The reactions of hydrolysis were performed in glass autoclaves at 120 °C. X-ray diffraction showed that α-FeOOH and α-Fe2O3 were present in hydrolytical products formed in solutions containing N03-ions, while β-FeOOH and α-Fe2O3 were typical hydrolytical products in solutions containing Cl- ions. In the mixed Fe(N03)3+FeCl3 solutions, the phase composition of the hydrolytical products was determined by the concentration of the dominant Fe(III)-salt. Fourier transform infrared spectroscopy and Mössbauer spectroscopy were also used for the structural characterizations of the hydrolytical products. Transmission electron microscopy showed a diversity of shapes of the particles, which depended strongly on the experimental conditions. All types of particle, observed by transmission electron microscopy, were interpreted.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA