The study of the conversion of intercalated compounds synthesized from a sol-gel procedure

Intercalated materials containing iron and carbonate species were synthesized in this work to study their hydrolysis and condensation from sol to gel transition. The former material was designated as PV (perovskite) and the latter HT (hydrotalcite). Another sample containing neither of the indicated...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2008-09, Vol.47 (3), p.274-282
Main Authors: Othman, M. R., Kim, J.
Format: Article
Language:English
Subjects:
Aluminum
Ceramics
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Computer simulation
Condensates
Conversion
Endothermic reactions
Exact sciences and technology
General and physical chemistry
Glass
Hydrolysis
Inorganic Chemistry
Magnesium hydroxide
Materials Science
Molecular dynamics
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper
Perovskites
Sol-gel processes
Swelling ratio
Synthesis
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Summary:Intercalated materials containing iron and carbonate species were synthesized in this work to study their hydrolysis and condensation from sol to gel transition. The former material was designated as PV (perovskite) and the latter HT (hydrotalcite). Another sample containing neither of the indicated ions was designated as AlMg(OH) 5 (aluminum magnesium hydroxide). The conversion energy of these materials for the hydrolysis and condensation reaction during the transition was estimated to be ≈14 cal/mol, much lower than the hydration energy of 10–14 kcal/mol computed using molecular dynamic simulation from the previous work. The energy consumed was interpreted as equivalent to the drop of temperature due to the endothermic reaction. PV material exhibited the highest swelling ratio, amounting to 76% from its dried weight, demonstrating its ability to intercalate water readily. HT sample, on the other hand, was completely saturated and did not dilate.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-008-1791-3