Naslov
Precipitation of α-Fe2O3 by forced hydrolysis of FeCl3 solutions in the presence of SDS

Autori
Ristić, Mira ; Štajdohar, Jasenka ; Musić, Svetozar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
ICAME 2015 Conference Programme, The 33rd International Conference on the Applications of the Moessbauer Effect / Ralf Roehlsberger - Hamburg : University of Hamburg, DESY, 2015, T03-31

Skup
ICAME 2015, The 33rd International Conference on the Applications of the Moessbauer Effect

Mjesto i datum
Hamburg, Njemačka, 13.09.2015. - 18.09.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
α-Fe2O3; hydrolysis of FeCl3 solution; sodium dodecyl sulfate; XRD; 57Fe Moessbauer spectroscopy; FT-IR spectroscopy

Sažetak
Hematite (alfa -Fe2O3) is an important material owing to its colloid and surface properties. It is important in the fundamental studies of colloid stability and adsorption phenomena, because alfa-Fe2O3 shows excellent acid/base surface properties and can also be prepared in different morphologies from nano to micro size. Forced hydrolysis of FeCl3 solutions via recrystallization of beta-FeOOH at low pH values is a simple way to produce alfa-Fe2O3 particles. In the present work the effect of SDS (sodium dodecyl sulfate) surfactant on the forced hydrolysis of FeCl3 solutions at 160^(o)C was investigated. The solid hydrolytical products were characterized using XRD, 57FeMössbauer and FT-IR spectroscopies. The morphology of the particles produced was inspected by FE SEM. In reference preparation systems only the phase transformation beta-FeOOH → alfa-Fe2O3 was noticed, whereas in the presence of SDS alfa-FeOOH as intermediate phase was also formed. The specific adsorption of sulfate groups on the nuclei/particles was responsible for the changes in the solid hydrolytical products as well as in the morphology and substructure of alfa-Fe2O3 particles.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA