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Forced hydrolysis of FeCl3 solutions in the presence of sodium dextran sulphate

  • Mira Ristić
  • Ivana Mitar
  • Svetozar Musić
Short Communication
  • 24 Downloads

Abstract

The effect of sodium dextran sulphate (Mw = 500,000) on the forced hydrolysis of FeCl3 solutions was investigated using a microwave-assisted method. Reference samples obtained upon 10 to 120 min of forced hydrolysis of the FeCl3 solution showed the presence of an α-Fe2O3 phase alone. After 10 min of the forced hydrolysis of FeCl3 in the solution containing sodium dextran sulphate, α-Fe2O3 and additionally β-FeOOH precipitated. The Mössbauer spectra of α-Fe2O3 precipitated in the presence of sodium dextran sulphate showed a significant broadening of spectral lines accompanied by decreased values of the hyperfine magnetic field. This was explained by lower α-Fe2O3 crystallinity. The FESEM of reference α-Fe2O3 samples showed cube-like particles of good uniformity in the submicrometer range. In the presence of dextran sulphate polymer, the α-Fe2O3 particles of varying sizes and close to egg-like shape were obtained as a result of the specific adsorption of sulphates on the oxide surface and steric conditions created by dextran branches.

Graphical abstract

Right side: Effect of sodium dextran sulphate on the size and shape of α-Fe2O3 particles produced by the forced hydrolysis of FeCl3 solutions in the presence of microwave irradiation; Left side: reference α-Fe2O3 particles.

Keywords

Forced hydrolysis Fe3+ ions α-Fe2O3 β-FeOOH Sodium dextran sulphate 

Notes

Funding

This research was funded by the Croatian Science Foundation and European Regional Development Fund—the Competitiveness and Cohesion Operational Programme: Project Nos: IP-2016- 06-8254 and KK.01.1.1.01.0001.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Division of Materials ChemistryRuđer Bošković InstituteZagrebCroatia
  2. 2.Faculty of ScienceUniversity of SplitSplitCroatia
  3. 3.Croatian Academy of Sciences and ArtsZagrebCroatia

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