1. Aerosol-generated mesoporous silicon oxycarbide particles.
- Author
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Pauletti, Alberto, Moskowitz, Guillaume, Millan, Thomas, Fernández-Martín, Cristina, Boissière, Cédric, Gervais, Christel, and Babonneau, Florence
- Subjects
AEROSOLS ,MESOPOROUS materials ,ORGANOSILICON compounds ,PYROLYSIS ,NUCLEAR magnetic resonance - Abstract
Aerosol-generated mesoporous organosilica submicronic spheres have been converted into porous silicon oxycarbide (SiCO) glasses by pyrolysis at 1000 °C in an inert atmosphere. Spherical mesoporous particles obtained from acidic solutions of 1,2-bis(triethoxysilyl) ethane and Pluronic® F127 structuring agent were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N
2 adsorption/desorption, and multi nuclear solid-state magic-angle spinning (MAS) NMR. These particles were then pyrolyzed at 1000 °C and transformed into a SiCO phase as evidenced by29 Si MAS NMR, while TEM shows preserved mesoporosity, unfortunately difficult to access owing to the presence of an outer layer of dense silica. [ABSTRACT FROM AUTHOR]- Published
- 2009
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