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Electric Field Mediated Ion Transport Through Charged Mesoporous Membranes

Published online by Cambridge University Press:  11 February 2011

Riaan Schmuhl ,
W. B. Samuel de Lint ,
Klaas Keizer ,
Albert van den Berg  and
Johan E. ten Elshof
Riaan Schmuhl
Affiliation:
MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
W. B. Samuel de Lint
Affiliation:
MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
Klaas Keizer
Affiliation:
MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
Albert van den Berg
Affiliation:
MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
Johan E. ten Elshof
Affiliation:
MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
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Abstract

The transport of ions from aqueous solutions through a stacked Au/α-Al2O3/γ-Al2O3/Au membrane under the influence of a dc potential difference is reported. The membrane shows high cation permselectivity at ionic strengths of ∼10-3 M at pH 4.3–6.5, which is associated with a combination of anion adsorption and double-layer overlap inside the pores of the γ-alumina layer. The cation flux can be controlled by ionic strength, dc potential difference and pH.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 752: Symposium AA – Membranes–Preparation, Properties and Applications , 2002 , AA9.3
Copyright
Copyright © Materials Research Society 2003

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References

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