Preparation of nanostructured hydrated antimony oxide using a sol-gel process. Characterization and applications for sorption of La3+ and Sm3+ from aqueous solutions

Preparation of nanostructured hydrated antimony oxide using a sol-gel process. Characterization... The study focused mainly on the synthesis of nanosized hydrated antimony oxide as an ion exchange material via sol-gel process using water as a reagent to control the pH and to obtain a pure and dense hydrated antimony oxide. The obtained antimony oxide was characterized using X-ray diffractometer, scanning electron microscope, TG-DTA, and fourier transform infrared spectroscopy. The result showed the formation of stibiconite with a cubic crystal structure in nanometric range (9.54 nm). FTIR study confirmed the formation of antimony oxide with characteristic bands at about 766 and 552 cm–1 attributed to Sb–O streatching modes of Sb–O–Sb and Sb–OH, respectively. The synthesized hydrated antimony oxide demonstrated monofunctional ion-exchange characteristic and reasonably good chemical stability in acidic and basic media. The synthesized ion exchanger was then used for the removal of lanthanum(III) and samarium(III) from aqueous solutions. As can be seen from distribution studies the distribution coefficient K d increased with increasing the reaction temperatures of the solution. Adsorption experiments were carried out using both batch and column systems. The Langmuir, Freundlich, and Dubinin–Radushkevich (D–R) equilibrium models were used and a value q max was 41.10 and 48.42 mg g–1 for La(III) and Sm(III), respectively. Thermodynamic parameters, ΔH°, ΔG°, and ΔS° were calculated and indicated an endothermic and spontaneous process. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Preparation of nanostructured hydrated antimony oxide using a sol-gel process. Characterization and applications for sorption of La3+ and Sm3+ from aqueous solutions

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427215080200
Publisher site
See Article on Publisher Site

Abstract

The study focused mainly on the synthesis of nanosized hydrated antimony oxide as an ion exchange material via sol-gel process using water as a reagent to control the pH and to obtain a pure and dense hydrated antimony oxide. The obtained antimony oxide was characterized using X-ray diffractometer, scanning electron microscope, TG-DTA, and fourier transform infrared spectroscopy. The result showed the formation of stibiconite with a cubic crystal structure in nanometric range (9.54 nm). FTIR study confirmed the formation of antimony oxide with characteristic bands at about 766 and 552 cm–1 attributed to Sb–O streatching modes of Sb–O–Sb and Sb–OH, respectively. The synthesized hydrated antimony oxide demonstrated monofunctional ion-exchange characteristic and reasonably good chemical stability in acidic and basic media. The synthesized ion exchanger was then used for the removal of lanthanum(III) and samarium(III) from aqueous solutions. As can be seen from distribution studies the distribution coefficient K d increased with increasing the reaction temperatures of the solution. Adsorption experiments were carried out using both batch and column systems. The Langmuir, Freundlich, and Dubinin–Radushkevich (D–R) equilibrium models were used and a value q max was 41.10 and 48.42 mg g–1 for La(III) and Sm(III), respectively. Thermodynamic parameters, ΔH°, ΔG°, and ΔS° were calculated and indicated an endothermic and spontaneous process.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Nov 21, 2015

References

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