El-Safty, S.A. and Evans, J.
Formation of highly ordered mesoporous silica materials adopting lyotropic liquid crystal mesophases
Journal of Materials Chemistry, 12, (1), . (doi:10.1039/b106077p).
Full text not available from this repository.
Mesoporous silica materials have been synthesised in strongly acidic media at pH = 1.3 using high concentrations of a non- ionic surfactant (Brij 76) as a structure- directing agent. Well- defined ordered mesoporous silicas with hexagonal (H-I), lamellar (L-infinity) and solid phase (S) structure have been prepared at room temperature according to the lyotropic liquid crystalline mesophases of Brij 76. At high temperature (60°C), highly ordered cubic (Ia3d), cubic (Im3m) and 3-d hexagonal (p6(3)/mmc) nanostructured materials have been produced. The synthesised materials were studied by powder X- ray diffraction (XRD), the Brunauer- Emmett-Teller (BET) method for nitrogen adsorption/ desorption isotherms and surface area measurements. Transmission electron microscopy (TEM), XRD and TEM patterns for all materials show well- defined long- range porous architectures. It was found that BET surface area values of the nanostructured materials are reduced upon increasing the temperature of synthesis.
|Digital Object Identifier (DOI):
||molecular-sieve mcm-41, pore-size, phases, surfactants, aluminosilicate, templates, films, manganosilicates, transformation, adsorbent
||17 Feb 2006
||16 Apr 2017 23:01
|Further Information:||Google Scholar|
Actions (login required)