物理化学学报 >> 1995, Vol. 11 >> Issue (07): 646-649.doi: 10.3866/PKU.WHXB19950716

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由硅酸酯合成单分散二氧化硅中碳的化学形态

陈胜利,董鹏,杨光华,杨九金   

  1. 石油大学重质油加工国家重点实验室|北京 昌平 102200
  • 收稿日期:1994-04-16 修回日期:1994-08-30 发布日期:1995-07-15
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Chemical State of Carbon in Monodisperse Silica Spheres Prepared from Alkoxysilanes

Chen Sheng-Li,Dong Peng,Yang Guang-Hua,Yang Jiu-Jin   

  1. National Heavy Oil Research Laboratory,Petroleum University,China 102200
  • Received:1994-04-16 Revised:1994-08-30 Published:1995-07-15
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关键词: 硅酸有机能, 单分散二氧化硅, 化学结构

Abstract:

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.

Key words: Alkoxysilanes, Monodisperse silica, Microstructure