Synthesis of diamine functionalized mesoporous organosilicas with large pores

Hybrid mesoporous silicas functionalized with ethylenediamine groups have been synthesized via sol–gel process under different conditions. The best textural properties, with pore diameters up to 170 Å, have been obtained using carboxylic acids as catalysts in propanol as solvent without the need for...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2009-12, Vol.52 (3), p.388-397
Main Authors: Fakhfakh, F., Baraket, L., Fraile, J. M., Mayoral, J. A., Ghorbel, A.
Format: Article
Language:English
Subjects:
Adsorption
Carboxylic acids
Catalysis
Ceramics
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Copper
Ethylenediamine
Exact sciences and technology
General and physical chemistry
Glass
Inorganic Chemistry
Materials Science
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper
Porous materials
Silicon dioxide
Sol-gel processes
Surface chemistry
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Hybrid mesoporous silicas functionalized with ethylenediamine groups have been synthesized via sol–gel process under different conditions. The best textural properties, with pore diameters up to 170 Å, have been obtained using carboxylic acids as catalysts in propanol as solvent without the need for any surfactant. The presence of the diamine moiety has been demonstrated by different characterization techniques, and the materials have been used in the adsorption of copper cations. The adsorption capacity of all the solids is high (up to 1.87 mmol/g and up to 2.47 Cu atoms/nm 2 ), with important variations in the properties of the silica surface, besides the role of the immobilized diamine moieties as ligand for copper. In general the surface area seems to be the most important feature controlling the adsorption.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-009-2039-6