Anion transport through ceramic electrodialysis membranes made with hydrated cerium dioxide
Ver/ Abrir
Impacto
Scholar |
Otros documentos de la autoría: Mora Gómez, Julia; García Gabaldón, Montserrat; Martí Calatayud, Manuel César; Mestre Beltrán, Sergio; Pérez-Herranz, Valentín
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
comunitat-uji-handle4:
INVESTIGACIONMetadatos
Título
Anion transport through ceramic electrodialysis membranes made with hydrated cerium dioxideAutoría
Fecha de publicación
2017-05Editor
WileyCita bibliográfica
Mora-Gómez J, García-Gabaldón M, Martí-Calatayud MC, Mestre S, Pérez-Herranz V. Anion transport through ceramic electrodialysis membranes made with hydrated cerium dioxide. J Am Ceram Soc. 2017;100:4180–4189. https://doi.org/10.1111/jace.14978Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://onlinelibrary.wiley.com/doi/10.1111/jace.14978/fullVersión
info:eu-repo/semantics/draftPalabras clave / Materias
Resumen
In this research, low-cost ceramic anion-exchange membranes have been developed from porous supports manufactured, using a chamotte as a pore former. An inorganic anion-exchanger (hydrated cerium dioxide) has been ... [+]
In this research, low-cost ceramic anion-exchange membranes have been developed from porous supports manufactured, using a chamotte as a pore former. An inorganic anion-exchanger (hydrated cerium dioxide) has been deposited into the support and fixed by thermal treatment. The effects of some process variables (such as the temperature of the thermal treatment or the pH of the electrolyte) on the properties of the anion-exchange membranes have been investigated. The electrochemical performance of the resulting membranes has been compared to that exhibited by ceramic anion-exchange membranes based on another anion exchanger (hydrated zirconium dioxide) deposited into alumina-kaolin supports. The temperature of the thermal treatment applied to fix the hydrated cerium dioxide (HCeD) does not affect the structure nor the electrochemical properties of the membranes. The porosity of the supports obtained, using a chamotte as the pore former was lower than that of the alumina-kaolin ones, which led to a lower deposition of hydrated cerium dioxide than that obtained for hydrated zirconium dioxide (HZrD) in alumina-kaolin supports. The higher porosity registered for the HZrD-based membrane also implies higher membrane conductivities. The selective transport of anions through the membranes was enhanced by increasing the number of infiltrating steps, as confirmed from current to voltage curves. However, this behavior was only apparent at acidic or neutral pH, thus confirming the amphoteric character of the anion-exchanger. Comparing the γ parameter (equivalents of ion exchanger per gram of deposited oxide), it is concluded that the porosity of the ceramic supports, consequence of their distinct microstructure, is the main parameter responsible for the difference in the ion-exchange capacity obtained for HZrD and HCeD membranes. Consequently, the CeO2 particles used in this work are also good candidates to impart ion-exchange properties to microporous ceramic supports. [-]
Proyecto de investigación
Ministerio de Economía y Competitividad (Spain) (project number CTQ2012-3750-C02-01/PPQ and CTQ2012-3750-C02- 02/PPQ)Derechos de acceso
Copyright © 1999 - 2017 John Wiley & Sons, Inc. All Rights Reserved
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
Aparece en las colecciones
- QUI_Articles [300]