effect of porosity and concentration polarization on electrolyte diffusive transport parameters through ceramic membranes with similar nanopore size
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ID: 136183
2014
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Abstract
Diffusive transport through nanoporous alumina membranes (NPAMs) produced by the two-step anodization method, with similar pore size but different porosity, is studied by analyzing membrane potential measured with NaCl solutions at different concentrations. Donnan exclusion of co-ions at the solution/membrane interface seem to exert a certain control on the diffusive transport of ions through NPAMs with low porosity, which might be reduced by coating the membrane surface with appropriated materials, as it is the case of SiO2. Our results also show the effect of concentration polarization at the membrane surface on ionic transport numbers (or diffusion coefficients) for low-porosity and high electrolyte affinity membranes, which could mask values of those characteristic electrochemical parameters.
| Reference Key |
romero2014nanomaterialseffect
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|---|---|
| Authors | ;Virginia Romero;Victor Vega;Javier García;Victor M. Prida;Blanca Hernando;Juana Benavente |
| Journal | progress in neuro-psychopharmacology & biological psychiatry |
| Year | 2014 |
| DOI |
10.3390/nano4030700
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| URL | |
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