Improvement of Selectivity of RALEX-CM Membranes via Modification by Ceria with a Functionalized Surface
Ion exchange membranes are widely used for water treatment and ion separation by electrodialysis. One of the ways to increase the efficiency of industrial membranes is their modification with various dopants. To improve the membrane permselectivity, a simple strategy of the membrane surface modifica...
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| Veröffentlicht in: | Polymers 2023-01, Vol.15 (3), p.647 |
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| creator | Stenina, Irina Yurova, Polina Achoh, Aslan Zabolotsky, Victor Wu, Liang Yaroslavtsev, Andrey |
| description | Ion exchange membranes are widely used for water treatment and ion separation by electrodialysis. One of the ways to increase the efficiency of industrial membranes is their modification with various dopants. To improve the membrane permselectivity, a simple strategy of the membrane surface modification was proposed. Heterogeneous RALEX-CM membranes were surface-modified by ceria with a phosphate-functionalized surface. Despite a decrease in ionic conductivity of the prepared composite membranes, their cation transport numbers slightly increase. Moreover, the modified membranes show a threefold increase in Ca
/Na
permselectivity (from 2.1 to 6.1) at low current densities. |
| doi_str_mv | 10.3390/polym15030647 |
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/Na
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/Na
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One of the ways to increase the efficiency of industrial membranes is their modification with various dopants. To improve the membrane permselectivity, a simple strategy of the membrane surface modification was proposed. Heterogeneous RALEX-CM membranes were surface-modified by ceria with a phosphate-functionalized surface. Despite a decrease in ionic conductivity of the prepared composite membranes, their cation transport numbers slightly increase. Moreover, the modified membranes show a threefold increase in Ca
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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; PubMed Central Open Access |
| subjects | Analysis Calcium ions Cerium Cerium oxides Chemical processes Composite materials Electric properties Electrodialysis Identification and classification Ion currents Ion exchange Ions Low currents Mechanical properties Membranes Membranes (Technology) Methods Selectivity Sodium Spectrum analysis Water treatment |
| title | Improvement of Selectivity of RALEX-CM Membranes via Modification by Ceria with a Functionalized Surface |
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