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Pure Appl. Chem., 2009, Vol. 81, No. 8, pp. 1449-1457

Published online 2009-07-24

Aerosol-generated mesoporous silicon oxycarbide particles

Alberto Pauletti*, Guillaume Moskowitz, Thomas Millan, Cristina Fernández-Martín, Cédric Boissière, Christel Gervais and Florence Babonneau

Laboratoire de Chimie de la Matière Condensée de Paris, Université Pierre et Marie Curie-Paris 6 and CNRS UMR 7574, Collège de France, 11 Place M. Berthelot, 75231 Paris Cedex 05, France

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), N2 adsorption/desorption, and multinuclear solid-state magic-angle spinning (MAS) NMR. These particles were then pyrolyzed at 1000 °C and transformed into a SiCO phase as evidenced by 29Si MAS NMR, while TEM shows preserved mesoporosity, unfortunately difficult to access owing to the presence of an outer layer of dense silica.