THE RELATIONSHIP BETWEEN SYNTHESIS TEMPERATURE OF SILICA GEL AND ITS STRUCTURAL PARAMETERS
Abstract
The relationship between the temperature of silicic acid gel deposition and the structure of silica formed, has been studied. It has been shown that, with increasing deposition temperature of silicic acid gel, structural parameters of silica samples obtained change greatly. The mechanism of structure formation has been considered and the main causes responsible for this process have been identified. It has been found that with increasing concentration of sodium silicate solution at constant precipitation temperature, the sorption capacity of samples increases while the specific surface area decreases. It has been shown that treatment of washed silica gel in boiling water improves its adsorption capacity and reduces its specific surface.
About the Authors
V. S. Komarov
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Academician, D. Sc. (Chemistry), Professor, Leading Researcher
Belarus
Academician, D. Sc. (Chemistry), Professor, Leading Researcher
S. V. Besarab
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Master of chemical sciences, Senior Researcher
Belarus
Master of chemical sciences, Senior Researcher
References
1. Smoluchowski M. V., “Drei Vortrage uber Diffusion, Brownsche Bewegung und Koagulation von Kolloidteilchen”, Zeitschrift für Physik, 1916, vol. 17, pp. 557–585.
2. Bernal, J. D., Fowler R. H., “A theory of water and ionic solution, with particular reference by hydrogen and hydroxyl ions”, Journal of Chemical Physics, 1933, vol 1, pp. 513–548.
3. Siniukov V. V., Struktura odnoatomnykh zhidkostei, vody i vodnykh rastvorov elektrolitov [The structure of momoatomic liquids, water and electrolyte water solutions], Nauka, Moscow, RU, 1976.
4. Kiselev A. V., Muttik G. G., “Adsorption of water vapour with silica and hydration of its surface”, Kolloidnyi zhurnal [Colloidal Journal], 1957, vol. 19, no. 5, pp. 564–571.
5. Kiselev A. V., Luk’ianovich V. M., Nikitin Iu. S., Oganesian E. B., Sarakhov A. I., “The effect of hydrothermal treatment temperature on structural changes of pores and framework of the model silica gel”, Kolloidnyi zhurnal [Colloidal Journal], 1969, vol. 31, no. 3, pp. 388–393.
6. Kiselev A. V., Nikitin Iu. S., Oganesian E. B., “The effect of hydrothermal treatment duration on structural changes of pores and framework of the industrial silica gel”, Kolloidnyi zhurnal [Colloidal Journal], 1969, vol. 31, no. 4, pp. 525–531.
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