Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 64, Issue 1, Pages 67-77Publisher
SPRINGER
DOI: 10.1007/s10971-012-2828-1
Keywords
Iron(III) ethoxide; Sol-gel; Microstructures; Silica
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Funding
- European Union [POIG.01.01.02-00-069/09]
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Spherical silica particles doped with iron oxide have been synthesized via base-catalyzed one-pot sol-gel process using tetraethoxysilane (TEOS) and iron(III) ethoxide (ITE) as co-precursors. In the modified Stober process adopted, depending on the concentration of ITE in the starting composition, materials of various morphologies were observed under a scanning electron microscope and an atomic force microscope. The presence of ITE significantly affected the formation process of particulate silica; the spherical particles were formed accompanied by the co-presence of irregular-shaped finer aggregates. The fraction of the aggregates with rough surfaces increased with an increase of the ITE content in the reaction mixture. Both the spherical particles and irregular-shaped aggregates contained iron hydroxide and they exhibited paramagnetic behavior. The chemical composition and physicochemical properties of the materials were determined using various complementary spectroscopic methods.
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