Hydrolysis of Fe(III) in the presence of mixed anions and promoters (CROSBI ID 290979)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ristić, Mira ; Kuzmann, Erno ; Homonnay, Zoltan ; Mitar, Ivana ; Musić, Svetozar
engleski
Hydrolysis of Fe(III) in the presence of mixed anions and promoters
Forced hydrolyses in the precipitation systems (a) Fe(NO3)(3)/Fe-2(SO4)(3) and FeCl3/Fe-2(SO4) (3) and (b) FeCl3/N-guanylurea sulphate were investigated using Fe-57 Mossbauer and FT-IR spectroscopies and scanning electron microscopy (FE SEM). Forced hydrolyses of Fe(NO3)(3)/Fe- 2(SO4)(3) solutions at 90 degrees C yielded superparamagnetic goethite nanorods, whereas in the case of FeCl3/Fe-2(SO4)(3) solutions the clusters of akaganeite nanoneedles were formed. With a prolonged heating time at 90 degrees C the conversion of these akaganeite nanoneedles into goethite nanorods was observed. Forced hydrolysis in the system FeCl3/N- guanylurea sulphate at 160 degrees C generated only hematite and goethite phases and their fractions depended on the concentration of FeCl3 and the amount of N-guanylurea sulphate in the solution. Different shapes of iron(III) oxyhydroxides and hematite in dependence on the experimental conditions were monitored with FE SEM. Specifically adsorbed sulphates on these particles, as shown by FT-IR spectroscopy, served as directing agents in the particle/crystal growth.
iron oxides ; forced hydrolysis ; sulphates ; Mossbauer spectroscopy
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Podaci o izdanju
324 (3)
2020.
1293-1302
objavljeno
0236-5731
1588-2780
10.1007/s10967-020-07158-w