Pillaring of bentonite clay with Al and Co

This work describes the synthesis and characterization of mixed Al/Co pillared clays. The materials were prepared using different Co concentrations: 10%, 25%, 50%, 75% and 100%. The samples were analyzed by XRD, N2 physisorption, chemical analysis (AA), 27Al NMR, FTIR and EPMA. The use of small amou...

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Detalles Bibliográficos
Autores: Bertella, Francine, Pergher, Sibele Berenice Castellã
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Brasil
Institución:Universidade Federal do Rio Grande do Norte (UFRN)
Repositorio:Repositório Institucional da UFRN
Idioma:inglés
OAI Identifier:oai:repositorio.ufrn.br:123456789/29640
Acceso en línea:https://repositorio.ufrn.br/jspui/handle/123456789/29640
Access Level:acceso abierto
Palabra clave:Mixed Al/Co pillars
Pillared clays
Cobalt
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spelling Pillaring of bentonite clay with Al and CoMixed Al/Co pillarsPillared claysCobaltThis work describes the synthesis and characterization of mixed Al/Co pillared clays. The materials were prepared using different Co concentrations: 10%, 25%, 50%, 75% and 100%. The samples were analyzed by XRD, N2 physisorption, chemical analysis (AA), 27Al NMR, FTIR and EPMA. The use of small amounts of Co (10% and 25%) resulted in the formation of pillared clays, and the material containing 25% cobalt exhibited superior characteristics compared to an Al pillared clay (basal spacing of 18 Å and BET surface area higher than 300 m2/g). The 27Al NMR results confirmed the formation of mixed Al/Co pillars; the ratio of the AlVI/AlIV signal intensities decreased, indicating that the AlVI content decreased while the Co content increased. Thus, the Co ions isomorphically substituted for Al in the Keggin ion structure (pillaring agent). When the Co content was 50%, 75% and 100%, pillared clays did not form. Therefore, it is possible to obtain clays with mixed Al/Co pillars for Co contents of up to 25%Elsevier2020-07-15T03:20:41Z2020-07-15T03:20:41Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfBERTELLA, Francine; PERGHER, Sibele Berenice Castellã. Pillaring of bentonite clay with Al and Co. Microporous And Mesoporous Materials, [s.l.], v. 201, p. 116-123, jan. 2015. ISSN 1387-1811. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S1387181114005162?via%3Dihub. Acesso em: 14 jul. 2020. https://doi.org/10.1016/j.micromeso.2014.09.0131387-1811https://repositorio.ufrn.br/jspui/handle/123456789/296400.1016/j.micromeso.2014.09.013ark:/41046/0013000000dw9Attribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNBertella, FrancinePergher, Sibele Berenice Castellã2021-02-15T18:29:33Zoai:repositorio.ufrn.br:123456789/29640Repositório InstitucionalPUBhttp://repositorio.ufrn.br/oai/repositorio@bczm.ufrn.bropendoar:2021-02-15T18:29:33Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.none.fl_str_mv Pillaring of bentonite clay with Al and Co
title Pillaring of bentonite clay with Al and Co
spellingShingle Pillaring of bentonite clay with Al and Co
Bertella, Francine
Mixed Al/Co pillars
Pillared clays
Cobalt
title_short Pillaring of bentonite clay with Al and Co
title_full Pillaring of bentonite clay with Al and Co
title_fullStr Pillaring of bentonite clay with Al and Co
title_full_unstemmed Pillaring of bentonite clay with Al and Co
title_sort Pillaring of bentonite clay with Al and Co
dc.creator.none.fl_str_mv Bertella, Francine
Pergher, Sibele Berenice Castellã
author Bertella, Francine
author_facet Bertella, Francine
Pergher, Sibele Berenice Castellã
author_role author
author2 Pergher, Sibele Berenice Castellã
author2_role author
dc.subject.por.fl_str_mv Mixed Al/Co pillars
Pillared clays
Cobalt
topic Mixed Al/Co pillars
Pillared clays
Cobalt
description This work describes the synthesis and characterization of mixed Al/Co pillared clays. The materials were prepared using different Co concentrations: 10%, 25%, 50%, 75% and 100%. The samples were analyzed by XRD, N2 physisorption, chemical analysis (AA), 27Al NMR, FTIR and EPMA. The use of small amounts of Co (10% and 25%) resulted in the formation of pillared clays, and the material containing 25% cobalt exhibited superior characteristics compared to an Al pillared clay (basal spacing of 18 Å and BET surface area higher than 300 m2/g). The 27Al NMR results confirmed the formation of mixed Al/Co pillars; the ratio of the AlVI/AlIV signal intensities decreased, indicating that the AlVI content decreased while the Co content increased. Thus, the Co ions isomorphically substituted for Al in the Keggin ion structure (pillaring agent). When the Co content was 50%, 75% and 100%, pillared clays did not form. Therefore, it is possible to obtain clays with mixed Al/Co pillars for Co contents of up to 25%
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01
2020-07-15T03:20:41Z
2020-07-15T03:20:41Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv BERTELLA, Francine; PERGHER, Sibele Berenice Castellã. Pillaring of bentonite clay with Al and Co. Microporous And Mesoporous Materials, [s.l.], v. 201, p. 116-123, jan. 2015. ISSN 1387-1811. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S1387181114005162?via%3Dihub. Acesso em: 14 jul. 2020. https://doi.org/10.1016/j.micromeso.2014.09.013
1387-1811
https://repositorio.ufrn.br/jspui/handle/123456789/29640
0.1016/j.micromeso.2014.09.013
dc.identifier.dark.fl_str_mv ark:/41046/0013000000dw9
identifier_str_mv BERTELLA, Francine; PERGHER, Sibele Berenice Castellã. Pillaring of bentonite clay with Al and Co. Microporous And Mesoporous Materials, [s.l.], v. 201, p. 116-123, jan. 2015. ISSN 1387-1811. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S1387181114005162?via%3Dihub. Acesso em: 14 jul. 2020. https://doi.org/10.1016/j.micromeso.2014.09.013
1387-1811
0.1016/j.micromeso.2014.09.013
ark:/41046/0013000000dw9
url https://repositorio.ufrn.br/jspui/handle/123456789/29640
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
repository.name.fl_str_mv Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv repositorio@bczm.ufrn.br
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score 15.300724

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