TY - JOUR

T1 - Structural Characteristics and Electrical Conductivity of Porous Glasses with Different Compositions in Solutions of Sodium, Lanthanum and Iron(III) Chlorides

AU - Ermakova, L. E.

AU - Kuznetsova, A. S.

AU - Antropova, T. V.

AU - Volkova, A. V.

AU - Anfimova, I. N.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Abstract: The structural characteristics (structural resistance coefficient, volume porosity, tortuosity coefficient, average pore radius, specific surface area) and specific electrical conductivity of high-silica micro- and macroporous glasses with different compositions (basic magnetite-free and magnetite-containing glasses) have been studied in solutions of sodium, lanthanum, and iron(III) chlorides at a constant ionic strength. It has been found that the differences in the morphology of the pore space and characteristics of secondary silica are the reasons for different intensities of variations in the structural parameters of microporous glasses upon their long-term contact with electrolyte solutions, with the most pronounced time variations occurring in lanthanum chloride solutions. In indifferent electrolyte solutions, glass composition has no effect on the value of the efficiency coefficient. For microporous glasses in solutions containing specifically adsorbabable ions, the value of the efficiency coefficient is mainly affected by the structure of secondary silica in pore space, other conditions being equal. It has been revealed that, in iron chloride solutions, the specificity of the counterions is more pronounced for the basic porous glasses.

AB - Abstract: The structural characteristics (structural resistance coefficient, volume porosity, tortuosity coefficient, average pore radius, specific surface area) and specific electrical conductivity of high-silica micro- and macroporous glasses with different compositions (basic magnetite-free and magnetite-containing glasses) have been studied in solutions of sodium, lanthanum, and iron(III) chlorides at a constant ionic strength. It has been found that the differences in the morphology of the pore space and characteristics of secondary silica are the reasons for different intensities of variations in the structural parameters of microporous glasses upon their long-term contact with electrolyte solutions, with the most pronounced time variations occurring in lanthanum chloride solutions. In indifferent electrolyte solutions, glass composition has no effect on the value of the efficiency coefficient. For microporous glasses in solutions containing specifically adsorbabable ions, the value of the efficiency coefficient is mainly affected by the structure of secondary silica in pore space, other conditions being equal. It has been revealed that, in iron chloride solutions, the specificity of the counterions is more pronounced for the basic porous glasses.

KW - COLLOIDO-CHEMICAL CHARACTERISTICS

KW - ELECTROSURFACE PROPERTIES

KW - ELECTROKINETIC CHARACTERISTICS

KW - TRANSPORT CHARACTERISTICS

KW - MAGNETIC-PROPERTIES

KW - NANOPOROUS GLASSES

KW - MEMBRANES

KW - FABRICATION

KW - PARAMETERS

KW - ADSORPTION

UR - http://www.scopus.com/inward/record.url?scp=85085276338&partnerID=8YFLogxK

U2 - 10.1134/S1061933X20030035

DO - 10.1134/S1061933X20030035

M3 - Article

AN - SCOPUS:85085276338

VL - 82

SP - 262

EP - 274

JO - Colloid Journal

JF - Colloid Journal

SN - 1061-933X

IS - 3

ER -