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/ D. V. Lebedev [et al.] // Pet. Chem. - 2018. - Vol. 58, Is. 6. - P474-481, DOI 10.1134/S0965544118060075. - Cited References:32. - This work was supported by the Russian Science Foundation, project no. 15-19-10017. The instrumental analysis of the materials was conducted at the Center for collective use of the Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 0965-5441. - ISSN 1555-6239РУБ Chemistry, Organic + Chemistry, Physical + Energy & Fuels + Engineering,

Аннотация: The effect of an external electric field on the ionic conductivity and selective properties of ceramic membranes based on alumina nanofibers coated with a conductive carbon layer has been studied. It has been shown that the membranes are ideally polarizable in the polarizing voltage range of -500 to +500 mV and, therefore, can be used for implementing switchable ionic selectivity. Experiments have revealed that the membrane resistance decreases with a change in the applied potential from 0 to +/- 500 mV. It has been shown that the membrane selectivity can be switched from anion to cation by varying the external potential. The surface charge density of the membranes has been determined in terms of the Teorell-Meyer-Sievers model according to the experimental measurements of the membrane potential.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Inst Computat Modeling, Krasnoyarsk 660036, Russia.
St Petersburg State Univ, Inst Chem, St Petersburg 198504, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Lebedev, D. V.; Solodovnichenko, V. S.; Simunin, M. M.; Ryzhkov, I. I.; Russian Science Foundation [15-19-10017]

/ I. I. Ryzhkov, A. S. Vyatkin, M. I. Medvedeva // J. Sib. Fed. Univ.-Math. Phys. - 2019. - Vol. 12, Is. 5. - P579-589, DOI 10.17516/1997-1397-2019-12-5-579-589. - Cited References:32. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project 18-48-242011 "Mathematical modelling of synthesis and ionic transport properties of conductive nanoporous membranes". . - ISSN 1997-1397. - ISSN 2313-6022РУБ Mathematics

Аннотация: The impact of potential applied to the conductive surface of nanoporous membrane on the membrane potential at zero current is investigated theoretically on the basis of two-dimensional Space-charge model. The membrane separates two reservoirs with different salt concentrations. It is shown that the variation of applied potential from negative to positive values results in the continuous change of membrane selectivity from cation to anion. For equal ion diffusion coefficients, the dependence of membrane potential on the applied potential is an odd function, while for different ion diffusion coefficients it is shifted along the applied potential axis due to contribution of diffusion potential enhanced by the induced charge effect. The decrease of pore radius results in the increase of ionic selectivity and steep transition between cation- selective and anion-selective states when the applied potential is changing.

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Держатели документа:
Inst Computat Modelling SB RAS, Akademgorodok 50-44, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny 79, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Ryzhkov, Ilya I.; Vyatkin, Anton S.; Medvedeva, Maria, I; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-48-242011]