| Autor: |
Hampsey, J. Eric, De Castro, Claudio L., McCaughey, Byron, Donghai Wang, Mitchell, Brian S., Yunfeng Lu, Kurkjian, C. |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society; Jul2004, Vol. 87 Issue 7, p1280-1286, 7p |
| Abstrakt: |
Nanostructured porous silica particles with sizes in the micrometer to sub-micrometer range are of great interest due to their potential applications as catalyst supports and nanocomposite materials. However, if these particles are to be used in industry, a process must be developed to affordably produce them on a large scale. This paper reports on a high-energy ball-milling process that has been used to create micrometerto sub-micrometer-sized mesoporous silica particles starting from a silica xerogel prepared by a surfactant self-assembly sol—gel process. We have studied various milling conditions such as milling media (zirconia, stainless steel, or steel-centered nylon balls), milling time, and the presence of surfactants during milling and the resulting effect on particle size and pore structure. Results from transmission electron microscopy, scanning electron microscopy, X-ray diffraction, light scattering, and nitrogen adsorption demonstrate the feasibility of producing large quantities of nanostructured particles by this simple milling process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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