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Micron to Sub-Micron Sized Highly Ordered Mesoporous Silica Particles Prepared Using a High Energy Ball Milling Process

Published online by Cambridge University Press:  10 February 2011

J. Eric Hampsey ,
Claudio L. De Castro ,
Byron F. McCaughey ,
Donghai Wang ,
Brian S. Mitchell  and
Yunfeng Lu
J. Eric Hampsey
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
Claudio L. De Castro
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
Byron F. McCaughey
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
Donghai Wang
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
Brian S. Mitchell
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
Yunfeng Lu
Affiliation:
Tulane University, Department of Chemical Engineering, New Orleans, LA 70118
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Abstract

Highly ordered mesoporous silica particles with sizes in the micron to sub-micron range are of great interest due to their applications as catalysts and filler materials. Currently, mesoporous silica particles are synthesized using large amounts of solvent, which is impractical for large scale-up in industry. This paper reports on a high-energy ball milling process that has been employed to create micron to sub-micron sized mesoporous silica particles starting from a silica xerogel prepared by a surfactant self-assembly sol-gel process. We have studied the effect of parameters such as milling media (e.g., zirconia, stainless steel, and steel centered nylon balls), milling time, the presence of surfactants during milling, particle size, and pore structure. Results from transmission electron microscopy (TEM), scanning electron microscopy (SEM), Xray diffraction (XRD), and nitrogen adsorption demonstrate the feasibility of producing large quantities of mesostructured particles by a simple milling process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 775: Symposium P – Self-Assembled Nanostructured Materials , 2003 , P3.29
Copyright
Copyright © Materials Research Society 2003

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