TY - JOUR

T1 - Structural and electrosurface properties of iron-containing nanoporous glasses in KNO3 solutions

AU - Ermakova, Lyudmila E.

AU - Kuznetsova, Anastasiia S.

AU - Volkova, Anna V.

AU - Antropova, Tatyana V.

PY - 2019/9/5

Y1 - 2019/9/5

N2 - The paper is devoted to study and comparison of the structural (volume porosity W, structural resistance coefficient β, tortuosity coefficient K, average pore radius r, specific surface area S0) and electrosurface (efficiency coefficient α, counter-ion transport number n+, electrokinetic potential ζ) properties of micro - and macroporous sodium borosilicate glasses containing (Fe 4–6) and not containing (8 V-NT) magnetite phase in 10−4 – 10−1 M KNO3 solutions. It has been found that the incorporation of an iron (III) oxide into basic sodium-borosilicate glass results in changes in the structure of the pore space of both microporous and macroporous glasses. Moreover, it is shown that the presence of magnetite in the structure of porous glasses does not have a noticeable effect on the values of the efficiency coefficients and potassium counter-ion transport number in the neutral pH region. It has also been established that the absolute values of the electrokinetic potential for microporous membranes of both compositions in the neutral pH region are close to each other. For macroporous membranes obtained under the same conditions, the absolute values of the electrokinetic potential for the iron-containing membrane are higher than these for basic membrane 8 V-NT.

AB - The paper is devoted to study and comparison of the structural (volume porosity W, structural resistance coefficient β, tortuosity coefficient K, average pore radius r, specific surface area S0) and electrosurface (efficiency coefficient α, counter-ion transport number n+, electrokinetic potential ζ) properties of micro - and macroporous sodium borosilicate glasses containing (Fe 4–6) and not containing (8 V-NT) magnetite phase in 10−4 – 10−1 M KNO3 solutions. It has been found that the incorporation of an iron (III) oxide into basic sodium-borosilicate glass results in changes in the structure of the pore space of both microporous and macroporous glasses. Moreover, it is shown that the presence of magnetite in the structure of porous glasses does not have a noticeable effect on the values of the efficiency coefficients and potassium counter-ion transport number in the neutral pH region. It has also been established that the absolute values of the electrokinetic potential for microporous membranes of both compositions in the neutral pH region are close to each other. For macroporous membranes obtained under the same conditions, the absolute values of the electrokinetic potential for the iron-containing membrane are higher than these for basic membrane 8 V-NT.

KW - Electric double layer

KW - Electrokinetic potential

KW - Ion transport number

KW - Magnetic porous glass

KW - Structural resistance coefficient

KW - Surface conductivity

KW - CONTAINING POROUS GLASSES

KW - MEMBRANES

KW - NANOPARTICLES

KW - TRANSPORT CHARACTERISTICS

KW - REMOVAL

KW - RESONANCE

KW - COLLOIDO-CHEMICAL CHARACTERISTICS

KW - MAGNETIC-PROPERTIES

KW - ELECTROKINETIC CHARACTERISTICS

KW - ELECTROCHEMICAL CHARACTERISTICS

UR - http://www.scopus.com/inward/record.url?scp=85066338829&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/structural-electrosurface-properties-ironcontaining-nanoporous-glasses-kno3-solutions

U2 - 10.1016/j.colsurfa.2019.05.037

DO - 10.1016/j.colsurfa.2019.05.037

M3 - Article

AN - SCOPUS:85066338829

VL - 576

SP - 91

EP - 102

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

ER -