Surface and textural characterization of TiO2 pillared organoclays

Detalhes bibliográficos
Autor(a) principal: Zacur Vercelone,Sofía Susana
Data de Publicação: 2015
Outros Autores: Sham,Edgardo Ling, Farfán Torres,Elsa Mónica
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Matéria (Rio de Janeiro. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300757
Resumo: ABSTRACTTiO2 organoclays are potential adsorbents for aqueous pollutants and subsequently they could favour the photocatalysis of them. For this reason, the study of their surface and textural characteristics is important for the improvement of those processes. In this work TiO2 pillared organoclays were studied. The surfactant (hexadecyltrimethilammonium bromide) was introduced post-pillaring or during the pillaring process. The effect of the use of different acids of hydrolysis and different surfactants ratios was investigated. The clays were characterized by thermogravimetric analysis, infrared spectroscopy and nitrogen sorptometry. It was found that the highest adsorption capacity post-pillaring of the surfactant is near to 0.5 times the CEC of the original pillared clay, independently of the amount of surfactant offered. An increment in the amount of the surfactant introduced only increased the ratio adsorbed as ionic pair. In these samples the CEC measured after the adsorption was between 0.26 and 0.47 times the original CEC. It was observed a decrease in the total pore volume and the BET surface for every sample. The surface hydrophobicity of the samples with post-pillaring adsorption was higher than in those with co-adsorption. In conclusion, it was demonstrated that the incorporation of surfactant modifies the surface and textural properties of the material in different extent in accordance with the incorporation stage and the amount of surfactant used.
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spelling Surface and textural characterization of TiO2 pillared organoclaysorganoclayspillared claystextural propertiessurface hydrophobicity.ABSTRACTTiO2 organoclays are potential adsorbents for aqueous pollutants and subsequently they could favour the photocatalysis of them. For this reason, the study of their surface and textural characteristics is important for the improvement of those processes. In this work TiO2 pillared organoclays were studied. The surfactant (hexadecyltrimethilammonium bromide) was introduced post-pillaring or during the pillaring process. The effect of the use of different acids of hydrolysis and different surfactants ratios was investigated. The clays were characterized by thermogravimetric analysis, infrared spectroscopy and nitrogen sorptometry. It was found that the highest adsorption capacity post-pillaring of the surfactant is near to 0.5 times the CEC of the original pillared clay, independently of the amount of surfactant offered. An increment in the amount of the surfactant introduced only increased the ratio adsorbed as ionic pair. In these samples the CEC measured after the adsorption was between 0.26 and 0.47 times the original CEC. It was observed a decrease in the total pore volume and the BET surface for every sample. The surface hydrophobicity of the samples with post-pillaring adsorption was higher than in those with co-adsorption. In conclusion, it was demonstrated that the incorporation of surfactant modifies the surface and textural properties of the material in different extent in accordance with the incorporation stage and the amount of surfactant used.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22015-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300757Matéria (Rio de Janeiro) v.20 n.3 2015reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/S1517-707620150003.0080info:eu-repo/semantics/openAccessZacur Vercelone,Sofía SusanaSham,Edgardo LingFarfán Torres,Elsa Mónicaeng2015-10-21T00:00:00Zoai:scielo:S1517-70762015000300757Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2015-10-21T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false
dc.title.none.fl_str_mv Surface and textural characterization of TiO2 pillared organoclays
title Surface and textural characterization of TiO2 pillared organoclays
spellingShingle Surface and textural characterization of TiO2 pillared organoclays
Zacur Vercelone,Sofía Susana
organoclays
pillared clays
textural properties
surface hydrophobicity.
title_short Surface and textural characterization of TiO2 pillared organoclays
title_full Surface and textural characterization of TiO2 pillared organoclays
title_fullStr Surface and textural characterization of TiO2 pillared organoclays
title_full_unstemmed Surface and textural characterization of TiO2 pillared organoclays
title_sort Surface and textural characterization of TiO2 pillared organoclays
author Zacur Vercelone,Sofía Susana
author_facet Zacur Vercelone,Sofía Susana
Sham,Edgardo Ling
Farfán Torres,Elsa Mónica
author_role author
author2 Sham,Edgardo Ling
Farfán Torres,Elsa Mónica
author2_role author
author
dc.contributor.author.fl_str_mv Zacur Vercelone,Sofía Susana
Sham,Edgardo Ling
Farfán Torres,Elsa Mónica
dc.subject.por.fl_str_mv organoclays
pillared clays
textural properties
surface hydrophobicity.
topic organoclays
pillared clays
textural properties
surface hydrophobicity.
description ABSTRACTTiO2 organoclays are potential adsorbents for aqueous pollutants and subsequently they could favour the photocatalysis of them. For this reason, the study of their surface and textural characteristics is important for the improvement of those processes. In this work TiO2 pillared organoclays were studied. The surfactant (hexadecyltrimethilammonium bromide) was introduced post-pillaring or during the pillaring process. The effect of the use of different acids of hydrolysis and different surfactants ratios was investigated. The clays were characterized by thermogravimetric analysis, infrared spectroscopy and nitrogen sorptometry. It was found that the highest adsorption capacity post-pillaring of the surfactant is near to 0.5 times the CEC of the original pillared clay, independently of the amount of surfactant offered. An increment in the amount of the surfactant introduced only increased the ratio adsorbed as ionic pair. In these samples the CEC measured after the adsorption was between 0.26 and 0.47 times the original CEC. It was observed a decrease in the total pore volume and the BET surface for every sample. The surface hydrophobicity of the samples with post-pillaring adsorption was higher than in those with co-adsorption. In conclusion, it was demonstrated that the incorporation of surfactant modifies the surface and textural properties of the material in different extent in accordance with the incorporation stage and the amount of surfactant used.
publishDate 2015
dc.date.none.fl_str_mv 2015-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300757
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300757
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1517-707620150003.0080
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
dc.source.none.fl_str_mv Matéria (Rio de Janeiro) v.20 n.3 2015
reponame:Matéria (Rio de Janeiro. Online)
instname:Matéria (Rio de Janeiro. Online)
instacron:RLAM
instname_str Matéria (Rio de Janeiro. Online)
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reponame_str Matéria (Rio de Janeiro. Online)
collection Matéria (Rio de Janeiro. Online)
repository.name.fl_str_mv Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)
repository.mail.fl_str_mv ||materia@labh2.coppe.ufrj.br
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