Chemical reactions on the surface of dispersed silica during gas-phase modification with MoCl{sub 5} vapors
Journal Article
·
· Colloid Journal of the Russian Academy of Sciences
OSTI ID:75690
- Institute of Surface Chemistry, Kiev (Ukraine)
The characteristic features of the gas-phase modification of silica by molybdenum pentachloride vapors were investigated. The grafted molybdenum chloride groups {triple_bond}SiOMoCl{sub 4} formed as a result of the reaction of MoCl{sub 5} with the silanol groups and siloxane bridges of the SiO{sub 2} surface undergo a rearrangement as a result of their instability, forming chlorosilyl groups and molybdenum oxychloride, which is removed from the silica surface. In the presence of an excess of the modifier MoCl{sub 5}, the reaction with siloxane bridges of the surface layer leads to the formation of silicon tetrachloride and is accompanied by etching of the surface of the dispersed silica globules.
- OSTI ID:
- 75690
- Journal Information:
- Colloid Journal of the Russian Academy of Sciences, Journal Name: Colloid Journal of the Russian Academy of Sciences Journal Issue: 6 Vol. 55; ISSN 1061-933X; ISSN CJRSEQ
- Country of Publication:
- United States
- Language:
- English
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