Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides

Autores
Rojas Delgado, Ricardo; de Pauli, Carlos Primo; Barriga Carrasco, C; Avena, Marcelo Javier
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Zn-Al layered double hydroxides with different MII/MIII ratios were synthesized by the coprecipitation method and the obtained solids were characterized by powder X-ray diffraction, infrared spectroscopy, acid-base potentiometric titrations, electrophoretic mobility and modeling of the electrical double layer. As general behavior, increasing hydroxyl adsorption with increasing pH and decreasing supporting electrolyte concentration takes place between pH 7 and 12. The electrophoretic mobility of the samples are in all cases positive and it decreases when the pH becomes higher than 9. A net positive charge of the particles, with a point of zero charge (PZC) around 11.8, is deduced from electrophoretic data. A modified MUSIC model, where OH-/Cl- exchange at structural sites and proton desorption from surface hydroxyl groups are taken into account, is used to estimate the deprotonation constants, the number of surface groups, the number of sites with structural charges an the affinity constants for Cl- and OH- of the samples with different MII/MIII ratios. The modeling of potentiometric titrations and electrophoresis data indicates that anions between the layers and negatively charged groups in the particle surface balance most of the structural charge at the particles surface. It shows an important variation of the number of structural sites with the MII/MIII ratio and an important role of surface protonation-deprotonation sites to the electrical behavior and exchange properties of LDHs. © 2007 Elsevier B.V. All rights reserved.
Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: de Pauli, Carlos Primo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Barriga Carrasco, C. Universidad de Córdoba; España
Fil: Avena, Marcelo Javier. Universidad Nacional del Sur. Departamento de Química; Argentina
Materia
Acid-Base Potentiometric Titrations
Electric Double Layer
Electrophoretic Mobilities
Layered Double Hydroxides
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/66053
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/66053
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxidesRojas Delgado, Ricardode Pauli, Carlos PrimoBarriga Carrasco, CAvena, Marcelo JavierAcid-Base Potentiometric TitrationsElectric Double LayerElectrophoretic MobilitiesLayered Double Hydroxideshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Zn-Al layered double hydroxides with different MII/MIII ratios were synthesized by the coprecipitation method and the obtained solids were characterized by powder X-ray diffraction, infrared spectroscopy, acid-base potentiometric titrations, electrophoretic mobility and modeling of the electrical double layer. As general behavior, increasing hydroxyl adsorption with increasing pH and decreasing supporting electrolyte concentration takes place between pH 7 and 12. The electrophoretic mobility of the samples are in all cases positive and it decreases when the pH becomes higher than 9. A net positive charge of the particles, with a point of zero charge (PZC) around 11.8, is deduced from electrophoretic data. A modified MUSIC model, where OH-/Cl- exchange at structural sites and proton desorption from surface hydroxyl groups are taken into account, is used to estimate the deprotonation constants, the number of surface groups, the number of sites with structural charges an the affinity constants for Cl- and OH- of the samples with different MII/MIII ratios. The modeling of potentiometric titrations and electrophoresis data indicates that anions between the layers and negatively charged groups in the particle surface balance most of the structural charge at the particles surface. It shows an important variation of the number of structural sites with the MII/MIII ratio and an important role of surface protonation-deprotonation sites to the electrical behavior and exchange properties of LDHs. © 2007 Elsevier B.V. All rights reserved.Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: de Pauli, Carlos Primo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Barriga Carrasco, C. Universidad de Córdoba; EspañaFil: Avena, Marcelo Javier. Universidad Nacional del Sur. Departamento de Química; ArgentinaElsevier Science2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/66053Rojas Delgado, Ricardo; de Pauli, Carlos Primo; Barriga Carrasco, C; Avena, Marcelo Javier; Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides; Elsevier Science; Applied Clay Science; 40; 1-4; 12-2008; 27-370169-1317CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169131707001342info:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2007.06.010info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:16:09Zoai:ri.conicet.gov.ar:11336/66053instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:16:09.322CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
title Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
spellingShingle Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
Rojas Delgado, Ricardo
Acid-Base Potentiometric Titrations
Electric Double Layer
Electrophoretic Mobilities
Layered Double Hydroxides
title_short Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
title_full Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
title_fullStr Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
title_full_unstemmed Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
title_sort Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides
dc.creator.none.fl_str_mv Rojas Delgado, Ricardo
de Pauli, Carlos Primo
Barriga Carrasco, C
Avena, Marcelo Javier
author Rojas Delgado, Ricardo
author_facet Rojas Delgado, Ricardo
de Pauli, Carlos Primo
Barriga Carrasco, C
Avena, Marcelo Javier
author_role author
author2 de Pauli, Carlos Primo
Barriga Carrasco, C
Avena, Marcelo Javier
author2_role author
author
author
dc.subject.none.fl_str_mv Acid-Base Potentiometric Titrations
Electric Double Layer
Electrophoretic Mobilities
Layered Double Hydroxides
topic Acid-Base Potentiometric Titrations
Electric Double Layer
Electrophoretic Mobilities
Layered Double Hydroxides
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Zn-Al layered double hydroxides with different MII/MIII ratios were synthesized by the coprecipitation method and the obtained solids were characterized by powder X-ray diffraction, infrared spectroscopy, acid-base potentiometric titrations, electrophoretic mobility and modeling of the electrical double layer. As general behavior, increasing hydroxyl adsorption with increasing pH and decreasing supporting electrolyte concentration takes place between pH 7 and 12. The electrophoretic mobility of the samples are in all cases positive and it decreases when the pH becomes higher than 9. A net positive charge of the particles, with a point of zero charge (PZC) around 11.8, is deduced from electrophoretic data. A modified MUSIC model, where OH-/Cl- exchange at structural sites and proton desorption from surface hydroxyl groups are taken into account, is used to estimate the deprotonation constants, the number of surface groups, the number of sites with structural charges an the affinity constants for Cl- and OH- of the samples with different MII/MIII ratios. The modeling of potentiometric titrations and electrophoresis data indicates that anions between the layers and negatively charged groups in the particle surface balance most of the structural charge at the particles surface. It shows an important variation of the number of structural sites with the MII/MIII ratio and an important role of surface protonation-deprotonation sites to the electrical behavior and exchange properties of LDHs. © 2007 Elsevier B.V. All rights reserved.
Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: de Pauli, Carlos Primo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Barriga Carrasco, C. Universidad de Córdoba; España
Fil: Avena, Marcelo Javier. Universidad Nacional del Sur. Departamento de Química; Argentina
description Zn-Al layered double hydroxides with different MII/MIII ratios were synthesized by the coprecipitation method and the obtained solids were characterized by powder X-ray diffraction, infrared spectroscopy, acid-base potentiometric titrations, electrophoretic mobility and modeling of the electrical double layer. As general behavior, increasing hydroxyl adsorption with increasing pH and decreasing supporting electrolyte concentration takes place between pH 7 and 12. The electrophoretic mobility of the samples are in all cases positive and it decreases when the pH becomes higher than 9. A net positive charge of the particles, with a point of zero charge (PZC) around 11.8, is deduced from electrophoretic data. A modified MUSIC model, where OH-/Cl- exchange at structural sites and proton desorption from surface hydroxyl groups are taken into account, is used to estimate the deprotonation constants, the number of surface groups, the number of sites with structural charges an the affinity constants for Cl- and OH- of the samples with different MII/MIII ratios. The modeling of potentiometric titrations and electrophoresis data indicates that anions between the layers and negatively charged groups in the particle surface balance most of the structural charge at the particles surface. It shows an important variation of the number of structural sites with the MII/MIII ratio and an important role of surface protonation-deprotonation sites to the electrical behavior and exchange properties of LDHs. © 2007 Elsevier B.V. All rights reserved.
publishDate 2008
dc.date.none.fl_str_mv 2008-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/66053
Rojas Delgado, Ricardo; de Pauli, Carlos Primo; Barriga Carrasco, C; Avena, Marcelo Javier; Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides; Elsevier Science; Applied Clay Science; 40; 1-4; 12-2008; 27-37
0169-1317
CONICET Digital
CONICET
url http://hdl.handle.net/11336/66053
identifier_str_mv Rojas Delgado, Ricardo; de Pauli, Carlos Primo; Barriga Carrasco, C; Avena, Marcelo Javier; Influence of MII/MIII ratio in surface-charging behavior of Zn-Al layered double hydroxides; Elsevier Science; Applied Clay Science; 40; 1-4; 12-2008; 27-37
0169-1317
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169131707001342
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2007.06.010
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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