Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization

Introduction of nanoparticles in membranes allows a significant enhancement of their performance in energy production, water treatment and other applications. However, the effect of nanoparticles’ surface functionalization and the mechanism of their impact on membrane properties remain poorly studie...

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Principais autores:	Dotsenko, V. V., Доценко, В. В.
Formato:	Статья
Idioma:	English
Publicado em:	Elsevier Ltd 2021
Assuntos:	Electrochemical properties Ion-exchange membrane Microheterogeneous Silica nanoparticles Water treatment Contact angle
Acesso em linha:	https://dspace.ncfu.ru/handle/20.500.12258/14930
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spelling	ir-20.500.12258-149302021-03-26T12:29:01Z Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization Dotsenko, V. V. Доценко, В. В. Electrochemical properties Ion-exchange membrane Microheterogeneous Silica nanoparticles Water treatment Contact angle Introduction of nanoparticles in membranes allows a significant enhancement of their performance in energy production, water treatment and other applications. However, the effect of nanoparticles’ surface functionalization and the mechanism of their impact on membrane properties remain poorly studied. In this paper, we examine a Nafion-based membrane and its modifications, each containing 3 wt% SiO2. The effect of functionalization by propyl, 3-aminopropyl and 3,3,3-trifluoropropyl is investigated. The water uptake, contact angle, conductivity, diffusion permeability to NaCl, current-voltage curves (CVC), chronopotentiograms (ChP), and the difference between the pH of the desalination compartment output and input solutions (characterizing the water splitting rate) are reported. It is found that the doping of the membranes with nanoparticles leads to increasing their conductivity in all cases except 3-aminopropyl, which imparts a positive charge to the nanoparticles; the diffusion permeability decreases and permselectivity increases in all cases. The latter is explained by transformation of the mesoporous membrane structure to the microporous one. The impact of nanoparticles on the membrane conductivity, CVC and ChP is mainly caused by an additional (positive) space charge introduced into the pore solution and at the membrane surface by the electric double layer surrounding the nanoparticles. The greater the surface charge density of the nanoparticles and the smaller their size, the stronger the impact. Accordingly, the highest conductivity, current density at a low fixed voltage and chronopotentiometric transition time are shown by the sample doped with SiO2 and 3,3,3-trifluoropropyl. The interplay between electroconvection and water splitting phenomena is discussed 2021-02-08T12:13:48Z 2021-02-08T12:13:48Z 2021 Статья Porozhnyy, M.V., Shkirskaya, S.A., Butylskii, D.Y., Dotsenko, V.V., Safronova, E.Y., Yaroslavtsev, A.B., Deabate, S., Huguet, P., Nikonenko, V.V. Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization // Electrochimica Acta. - 2021. - Volume 370. - Номер статьи 137689 http://hdl.handle.net/20.500.12258/14930 en Electrochimica Acta application/pdf application/pdf Elsevier Ltd
institution	СКФУ
collection	Репозиторий
language	English
topic	Electrochemical properties Ion-exchange membrane Microheterogeneous Silica nanoparticles Water treatment Contact angle
spellingShingle	Electrochemical properties Ion-exchange membrane Microheterogeneous Silica nanoparticles Water treatment Contact angle Dotsenko, V. V. Доценко, В. В. Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
description	Introduction of nanoparticles in membranes allows a significant enhancement of their performance in energy production, water treatment and other applications. However, the effect of nanoparticles’ surface functionalization and the mechanism of their impact on membrane properties remain poorly studied. In this paper, we examine a Nafion-based membrane and its modifications, each containing 3 wt% SiO2. The effect of functionalization by propyl, 3-aminopropyl and 3,3,3-trifluoropropyl is investigated. The water uptake, contact angle, conductivity, diffusion permeability to NaCl, current-voltage curves (CVC), chronopotentiograms (ChP), and the difference between the pH of the desalination compartment output and input solutions (characterizing the water splitting rate) are reported. It is found that the doping of the membranes with nanoparticles leads to increasing their conductivity in all cases except 3-aminopropyl, which imparts a positive charge to the nanoparticles; the diffusion permeability decreases and permselectivity increases in all cases. The latter is explained by transformation of the mesoporous membrane structure to the microporous one. The impact of nanoparticles on the membrane conductivity, CVC and ChP is mainly caused by an additional (positive) space charge introduced into the pore solution and at the membrane surface by the electric double layer surrounding the nanoparticles. The greater the surface charge density of the nanoparticles and the smaller their size, the stronger the impact. Accordingly, the highest conductivity, current density at a low fixed voltage and chronopotentiometric transition time are shown by the sample doped with SiO2 and 3,3,3-trifluoropropyl. The interplay between electroconvection and water splitting phenomena is discussed
format	Статья
author	Dotsenko, V. V. Доценко, В. В.
author_facet	Dotsenko, V. V. Доценко, В. В.
author_sort	Dotsenko, V. V.
title	Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
title_short	Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
title_full	Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
title_fullStr	Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
title_full_unstemmed	Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization
title_sort	physicochemical and electrochemical characterization of nafion-type membranes with embedded silica nanoparticles: effect of functionalization
publisher	Elsevier Ltd
publishDate	2021
url	https://dspace.ncfu.ru/handle/20.500.12258/14930
work_keys_str_mv	AT dotsenkovv physicochemicalandelectrochemicalcharacterizationofnafiontypemembraneswithembeddedsilicananoparticleseffectoffunctionalization AT docenkovv physicochemicalandelectrochemicalcharacterizationofnafiontypemembraneswithembeddedsilicananoparticleseffectoffunctionalization
_version_	1760602068412792832

Physicochemical and electrochemical characterization of Nafion-type membranes with embedded silica nanoparticles: Effect of functionalization

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