Structure and Electrosurface Properties of Porous Glasses with Different Compositions in KCl and NaCl Solutions

• DOI: 10.1007/s10595-005-0097-1
• Publication Date: 2005-06-20T15:51:24Z
• Authors: L. E. Ermakova; S. V. Medvedeva; A. V. Volkova; M. P. Sidorova; T. V. Antropova
• Keywords: 0103 physical sciences; 01 natural sciences

For porous glasses with and without small amounts of fluorine and phosphorus, structural (specific surface area, structure resistance coefficient, and mean pore radius) and electrosurface characteristics (adsorption of potential-determining ions, conductivity, counterion transport numbers, and electrokinetic potential) in sodium and potassium chloride solutions are compared. Results of measuring the equilibrium and transport characteristics of membranes are used to calculate the constants of surface reactions and adsorption potentials of ions within the framework of the 2-pK model of oxide surface charging. Within the framework of the homogeneous model, electrochemical characteristics of porous glasses, namely, concentrations of co- and counterions in a pore-confined liquid, Donnan potentials, convective component of the conductivity of a pore-confined solution, and mobility of counterions in the membranes, are calculated.