Hexagonal mesoporous silica nanoparticles with large pores and a hierarchical porosity tested for HPLC

Journal article (2005)

Authors

MU Martines External organisation
E Yeong External organisation
M Persin External organisation
A Larbot External organisation
WF Voorhout External organisation
CKU Kubel External organisation
E Prouzet External organisation
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Published Date

2005

Language

Undefined/Unknown

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Abstract

We report the preparation of a novel type of mesoporous silica of the MSU-type family. This material was prepared with Pluronic P123 copolymer in mild acidity according to a two-step process. Its structure was explored by X-ray diffraction, N2 isotherms, SEM and TEM. The TEM study was completed by a 3D tomography analysis that allowed us to obtain information on the morphology of the pore-and-void system. The powder is homogeneous and made of nanoparticles (200 nm in size) built by the folding of ribbons with hexagonally-packed pores (pore diameter of 8.6 nm). This folding creates microvoids in the particles that give rise to an additional porosity. The properties of adsorption/separation of this new type of silica were tested for HPLC. Although the powder was not optimized for this application, the first results on ungrafted silica appear equivalent to those obtained with a commercial HPLC silica powder.