The influence of CTAB and gum arabic on the precipitation of a-FeOOH in a highly alkaline medium (CROSBI ID 213741)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ristić, Mira ; Opačak, Ivana ; Štajdohar, Jasenka ; Musić, Svetozar
engleski
The influence of CTAB and gum arabic on the precipitation of a-FeOOH in a highly alkaline medium
The influence of cetyltrimethylammonium bromide (CTAB) and gum arabic (GA) on the precipitation of α-FeOOH in a highly alkaline medium was investigated using XRD, 57Fe Mössbauer, FT-IR and FE-SEM. In absence of CTAB and GA long α-FeOOH rods of nanosize width were obtained. For predetermined concentrations of CTAB added to the precipitation system the formation of a small fraction of α-Fe2O3 was noticed, whereas the length of the α-FeOOH rods significantly decreased and α-FeOOH dendrites were also found. The effect was specifically pronounced when GA was added to the precipitation system. The formation of ferrihydrite-like phase was detected, which suppressed the crystal growth of α-FeOOH on one side and forced the nucleation and growth of α-Fe2O3 on the other. Microstructural changes in the precipitates were also monitored. The phase transformation and changes in the nano/microstructure of the precipitates found can be explained taking into account the surface interactions between CTAB or GA with nuclei and crystallites (particles) during the kinetics investigated.
αlfa-FeOOH; XRD; 57^Fe Mossbauer; FT-IR; FE-SEM
Rad je prezentiran na skupu the XXXIInd European Congress on Molecular Spectroscopy, održanom od 24.-29.08.2014.g., Düsseldorf, Njemačka.
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Podaci o izdanju
1090
2015.
129-137
objavljeno
0022-2860
10.1016/j.molstruc.2014.11.040