Dynamics of growth of silica particles from ammonia-catalyzed hydrolysis of tetra-ethyl-orthosilicate

T. Matsoukas; Erdogan Gulari

doi:10.1016/0021-9797(88)90346-3

Dynamics of growth of silica particles from ammonia-catalyzed hydrolysis of tetra-ethyl-orthosilicate

T. Matsoukas, Erdogan Gulari

Chemical Engineering

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297 Scopus citations

Abstract

The NH₃-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized by an incubation period after which no significant nucleation takes place. The particles have uniform, non-fractal structure and show low polydispersity. In the presence of excess water, the rate-limiting step is the hydrolysis, which is a first-order process in the orthosilicate concentration.

Original language	English (US)
Pages (from-to)	252-261
Number of pages	10
Journal	Journal of Colloid And Interface Science
Volume	124
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(88)90346-3
State	Published - Jul 1988

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/0021-9797(88)90346-3

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title = "Dynamics of growth of silica particles from ammonia-catalyzed hydrolysis of tetra-ethyl-orthosilicate",

abstract = "The NH3-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized by an incubation period after which no significant nucleation takes place. The particles have uniform, non-fractal structure and show low polydispersity. In the presence of excess water, the rate-limiting step is the hydrolysis, which is a first-order process in the orthosilicate concentration.",

author = "T. Matsoukas and Erdogan Gulari",

note = "Funding Information: Financial support of this research by the TTP program of the NSF under Grants CBT830350 and 8701718 is gratefully acknowledged.",

year = "1988",

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AU - Matsoukas, T.

AU - Gulari, Erdogan

N1 - Funding Information: Financial support of this research by the TTP program of the NSF under Grants CBT830350 and 8701718 is gratefully acknowledged.

PY - 1988/7

Y1 - 1988/7

N2 - The NH3-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized by an incubation period after which no significant nucleation takes place. The particles have uniform, non-fractal structure and show low polydispersity. In the presence of excess water, the rate-limiting step is the hydrolysis, which is a first-order process in the orthosilicate concentration.

AB - The NH3-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized by an incubation period after which no significant nucleation takes place. The particles have uniform, non-fractal structure and show low polydispersity. In the presence of excess water, the rate-limiting step is the hydrolysis, which is a first-order process in the orthosilicate concentration.

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Dynamics of growth of silica particles from ammonia-catalyzed hydrolysis of tetra-ethyl-orthosilicate

Abstract

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