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Citation: Chen Sheng-Li, Dong Peng, Yang Guang-Hua, Yang Jiu-Jin. Chemical State of Carbon in Monodisperse Silica Spheres Prepared from Alkoxysilanes[J]. Acta Physico-Chimica Sinica, ;1995, 11(07): 646-649. doi: 10.3866/PKU.WHXB19950716 shu

Chemical State of Carbon in Monodisperse Silica Spheres Prepared from Alkoxysilanes

1.
National Heavy Oil Research Laboratory,Petroleum University,China 102200

Received Date: 16 April 1994
Available Online: 15 July 1995

Monodisperse silica spheres were prepared by hydrolysis and condensation of tetraethoxysilane (TEOS) in a mixture of water, ammonia and ethanol or acetone at 25℃. The spheres were studied with 13C CP-MAS NMR and their carbon contents were determined. It was found that TEOS was hydrolyzed completely during the sythesis process of monodisperse silica particles and that the carbon inside the silica is in the form of free solvent sheilded in the silica, this is, in accord with the mechanism of aggregation growth.
- Alkoxysilanes,
- Monodisperse silica,
- Microstructure
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