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Article Dans Une Revue Journal of Materials Chemistry Année : 2008

Synthesis and characterisation of carboxylate-terminated silica nanohybrid powders and thin films

Résumé

Novel organic–inorganic hybrid materials, in the form of bulk materials (powders) and thin films, exhibiting carboxylate functionality have been prepared by sol–gel co-condensation of 11-(triethoxysilyl)methylundecanoate with tetraethoxysilane (TEOS), followed by chemical treatment with AlI3 to convert the ester moieties into terminal carboxylic acid sites. Uniform nanostructured thin films were prepared by spin-coating on silicon wafers. Both powders and thin films were used to study the uptake behaviour of lanthanide cations, such as Eu3+ or La3+ from aqueous solutions. It has been shown that the uptake capacity (mg g-1) of the films is 3–4 times higher than that of bulk (powder) materials. This has been attributed to the larger number of accessible COO- groups in the thin film form compared with the bulk material.

Domaines

Matériaux

Dates et versions

hal-00319689 , version 1 (09-09-2008)

Identifiants

Citer

Guilhem Arrachart, David Cassidy, Inna Karartchevtseva, John R. Bartlett, G. Triani, et al.. Synthesis and characterisation of carboxylate-terminated silica nanohybrid powders and thin films. Journal of Materials Chemistry, 2008, 18, pp.3643-3649. ⟨10.1039/b803100b⟩. ⟨hal-00319689⟩
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