TY - JOUR

T1 - Electrokinetic Properties of Vitreous Mesoporous Membranes Doped with Silver Iodide

AU - Ермакова, Людмила Эдуардовна

AU - Кузнецова, Анастасия Сергеевна

AU - Гирсова, Марина Андреевна

AU - Куриленко, Людмила Николаевна

AU - Антропова, Татьяна Викторовна

N1 - Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/8

Y1 - 2022/8

N2 - Abstract: High-silica mesoporous (pore radii 1.5–1.6 nm, MIP and pore radii 18.4–25.2 nm, MAP) vitreous AgI-doped membranes of the Vycor type have been manufactured. Characterization of the mesoporous glass morphology carried out by scanning electron microscopy (SEM). Successful synthesis of AgI-doped mesoporous glasses was confirmed by X-ray fluorescence (XRF) spectroscopy and energy-dispersive X-ray (EDX) spectroscopy. For the first time a comprehensive study of structural characteristics and electrokinetic properties (surface conductivity, streaming potential) of the AgI-doped MIP and MAP glasses in NaNO 3, KNO 3 and AgNO 3 solutions in the concentration range 0.1–0.0001 M have been performed. The electrokinetic potential (ζ-potential) was found by the streaming potential method taking into account the surface conductivity and the electric double layers (EDL) overlap. The results were compared with the ζ-potential calculated from the electrophoretic mobility of the particles (laser Doppler velocimetry). It has been established that the structure of EDL in membrane nanopores and on the open surface of the AgI-doped porous particle differ significantly—different signs of the streaming potentials (negative) and electrophoretic mobility (positive) were observed for the AgI-doped glasses in AgNO 3 solution.

AB - Abstract: High-silica mesoporous (pore radii 1.5–1.6 nm, MIP and pore radii 18.4–25.2 nm, MAP) vitreous AgI-doped membranes of the Vycor type have been manufactured. Characterization of the mesoporous glass morphology carried out by scanning electron microscopy (SEM). Successful synthesis of AgI-doped mesoporous glasses was confirmed by X-ray fluorescence (XRF) spectroscopy and energy-dispersive X-ray (EDX) spectroscopy. For the first time a comprehensive study of structural characteristics and electrokinetic properties (surface conductivity, streaming potential) of the AgI-doped MIP and MAP glasses in NaNO 3, KNO 3 and AgNO 3 solutions in the concentration range 0.1–0.0001 M have been performed. The electrokinetic potential (ζ-potential) was found by the streaming potential method taking into account the surface conductivity and the electric double layers (EDL) overlap. The results were compared with the ζ-potential calculated from the electrophoretic mobility of the particles (laser Doppler velocimetry). It has been established that the structure of EDL in membrane nanopores and on the open surface of the AgI-doped porous particle differ significantly—different signs of the streaming potentials (negative) and electrophoretic mobility (positive) were observed for the AgI-doped glasses in AgNO 3 solution.

KW - electrical double layer

KW - nanoporous glass

KW - silver iodide

KW - surface conductivity

KW - zeta potential

UR - http://www.scopus.com/inward/record.url?scp=85135441481&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a6e1fde5-eb88-3398-b00c-22e43d3fd50f/

U2 - 10.1134/s1087659622040071

DO - 10.1134/s1087659622040071

M3 - Article

VL - 48

SP - 248

EP - 265

JO - Glass Physics and Chemistry

JF - Glass Physics and Chemistry

SN - 1087-6596

IS - 4

ER -