Specifics Of The Temperature Dependence Of The Diffusion Coefficient For A Cocl2 Aqueous Solution In Porous-Glass Membranes
Russian Journal of Physical Chemistry A
The diffusion transport of a 0.1 M CoCl2 aqueous solution in a number of porous-glass membranes with a prevailing pore radius of rp = 4.5-70 nm was studied over a temperature range of 25-70°C. In all cases, the diffusion coefficients were found to obey the D = D0exp(K s/rp) functional dependence, where D0 is the diffusion coefficient for the bulk solution and Ks is the characteristic-dimension parameter reflecting the degree of structurizing of the liquid layer near a silica surface. At 70°C, Ks is vanishing small, leading to D - D0, in agreement with the concept that temperature rise suppresses the effect of structurization of water near a silica surface. Copyright © 2005 by Pleiades Publishing, Inc.
Department of Chemistry
Original Publication Date
Pak, V. N.; Nepomnyashchii, A. B.; Burkat, T. M.; and Coon, Sh R., "Specifics Of The Temperature Dependence Of The Diffusion Coefficient For A Cocl2 Aqueous Solution In Porous-Glass Membranes" (2005). Faculty Publications. 2918.