Aero-sol-gel synthesis of nanostructured silica powders

被引:24
作者
HyeonLee, J
Beaucage, G
Pratsinis, SE
机构
[1] UNIV CINCINNATI, DEPT MAT SCI & ENGN, CINCINNATI, OH 45221 USA
[2] UNIV CINCINNATI, DEPT CHEM ENGN, CINCINNATI, OH 45221 USA
关键词
D O I
10.1021/cm9703482
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nanostructured silica powders are synthesized by a nonpyrolytic, room-temperature aerosol-gel process. Hydrolysis and condensation of tetraethoxysilane (TEOS) and tetramethoxysilane (TMOS) precursors produce nanosized silica powders that have specific surface areas greater than 400 m(2)/g. This paper reports on a novel synthetic approach and characterization of the morphology, particle growth process, surface area, and chemical composition using small-angle X-ray scattering (SAXS), N-2 adsorption, and elemental analysis. Structural models for the morphology and growth process of the silica particles are suggested. The effects of reactant-temperature and powder sintering on the specific surface area of silica are discussed.
引用
收藏
页码:2400 / 2403
页数:4
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