Novel silica membrane material for molecular sieve applications

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Title: Novel silica membrane material for molecular sieve applications
Authors: El-Feky, Hany Hassan | Briceño, Kelly | Oliveira Jardim, Erika de | Silvestre-Albero, Joaquín | Gumí, Tània
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Unsupported silica membrane | Surface modification | Molecular sieve | Hybrid silica | Cobalt-doping
Knowledge Area: Química Inorgánica
Issue Date: 15-Sep-2013
Publisher: Elsevier
Citation: Microporous and Mesoporous Materials. 2013, 179: 22-29. doi:10.1016/j.micromeso.2013.04.029
Abstract: Development of new silica membranes properties, e.g., molecular sieving properties, has been increasingly gaining importance in the last few years. A novel unsupported silica membrane, referred to as hydrophobic metal-doped silica, was developed by cobalt-doping within the organic templated silica matrix. The novel material was prepared by the acid-catalyzed hydrolysis and condensation process of tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES), which is the precursor for methyl ligand covalently bounded to the silica matrix. The synthesis and surface properties of the novel unsupported silica membrane as well as the unsupported blank silica and modified silica membranes were revealed by surface and microstructural techniques, such as water contact angle measurement, FTIR, X-ray, Solid-state 29Si MAS NMR, TGA and N2 and CO2 adsorption measurements. The results showed that the thermal stability of the organic templated silica matrix was enhanced by cobalt-doping process. A hydrophobic microporous silica membrane material with high thermal stability up to ∼560 °C in oxidizing atmosphere and a narrow pore size distribution centered at 1.1 nm was obtained. Therefore, a novel precursor material for molecular sieve silica membranes applications has been achieved and developed.
Sponsor: H. Hassan El-Feky acknowledges “Departament d’Economia I Coneixement” de la “Generalitat de Catalunya” in its department of Support to Universities and Research (SUR del DEC), together with Fons Social Europeu (FSE) for funding.
URI: http://hdl.handle.net/10045/39540
ISSN: 1387-1811 (Print) | 1873-3093 (Online)
DOI: 10.1016/j.micromeso.2013.04.029
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.micromeso.2013.04.029
Appears in Collections:INV - LMA - Artículos de Revistas

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