Hydrolysis catalyst effect on sol–gel silica structure

Silica samples were prepared by the sol–gel process varying the hydrolysis catalyst. The samples were characterized by X-ray diffraction and the radial distribution function was determined (R.D.F.). Fourier transform infrared spectroscopy and thermal analysis were also used. It was found that OH-ret...

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Bibliographic Details
Published in:Materials letters 1998, Vol.36 (5), p.249-253
Main Authors: Asomoza, M, Domı́nguez, M.P, Solı́s, S, Lara, V.H, Bosch, P, López, T
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
DSC
Exact sciences and technology
FTIR
Glasses
Hydrolysis catalyst
Manufacture
RDF
SiO 2
Sol–gel
Structure
TGA
X-ray diffraction
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Summary:Silica samples were prepared by the sol–gel process varying the hydrolysis catalyst. The samples were characterized by X-ray diffraction and the radial distribution function was determined (R.D.F.). Fourier transform infrared spectroscopy and thermal analysis were also used. It was found that OH-retention capacity as well as order in the material may be modified with hydrolysis catalysts. When the hydrolysis catalyst was NH 4OH the sample did not dehydroxylate even at 1000°C.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(98)00043-3