Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification

Detalhes bibliográficos
Autor(a) principal: Gomes,Gilmar de Almeida
Data de Publicação: 1999
Outros Autores: Boodts,Julien Françoise Coleta
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000200003
Resumo: The surface properties of commercial TiO2 and samples synthesized by the thermal decomposition procedure using several precursor salts were investigated by a microelectrophoresis technique. The iep was determined as a function of the ionic strength which was controlled with KNO3 or KCl. The experimental results showed: 1) The commercial sample and the ones synthesized from the chloride salt dissolved in HCl 1:1 (v/v) show low iep’s due to chloride inclusion; 2) The purification methods explored (oxide suspension at pH~12 and dialysis) are inefficient; 3) TiO2 samples synthesized from an organic precursor salt under totally chloride-free conditions furnished an iep of 5.9 in excellent agreement with literature data; 4) Chloride specific adsorption on TiO2 is weak.
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spelling Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purificationelectrocatalysissurface propertiestitanium dioxidechloride specific adsorptionThe surface properties of commercial TiO2 and samples synthesized by the thermal decomposition procedure using several precursor salts were investigated by a microelectrophoresis technique. The iep was determined as a function of the ionic strength which was controlled with KNO3 or KCl. The experimental results showed: 1) The commercial sample and the ones synthesized from the chloride salt dissolved in HCl 1:1 (v/v) show low iep’s due to chloride inclusion; 2) The purification methods explored (oxide suspension at pH~12 and dialysis) are inefficient; 3) TiO2 samples synthesized from an organic precursor salt under totally chloride-free conditions furnished an iep of 5.9 in excellent agreement with literature data; 4) Chloride specific adsorption on TiO2 is weak.Sociedade Brasileira de Química1999-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000200003Journal of the Brazilian Chemical Society v.10 n.2 1999reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531999000200003info:eu-repo/semantics/openAccessGomes,Gilmar de AlmeidaBoodts,Julien Françoise Coletaeng2002-10-23T00:00:00Zoai:scielo:S0103-50531999000200003Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2002-10-23T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
title Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
spellingShingle Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
Gomes,Gilmar de Almeida
electrocatalysis
surface properties
titanium dioxide
chloride specific adsorption
title_short Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
title_full Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
title_fullStr Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
title_full_unstemmed Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
title_sort Investigation of the Surface Properties of an Oxide of Interest in the Field of a Conductive Oxide System: Influence of Precursor and Purification
author Gomes,Gilmar de Almeida
author_facet Gomes,Gilmar de Almeida
Boodts,Julien Françoise Coleta
author_role author
author2 Boodts,Julien Françoise Coleta
author2_role author
dc.contributor.author.fl_str_mv Gomes,Gilmar de Almeida
Boodts,Julien Françoise Coleta
dc.subject.por.fl_str_mv electrocatalysis
surface properties
titanium dioxide
chloride specific adsorption
topic electrocatalysis
surface properties
titanium dioxide
chloride specific adsorption
description The surface properties of commercial TiO2 and samples synthesized by the thermal decomposition procedure using several precursor salts were investigated by a microelectrophoresis technique. The iep was determined as a function of the ionic strength which was controlled with KNO3 or KCl. The experimental results showed: 1) The commercial sample and the ones synthesized from the chloride salt dissolved in HCl 1:1 (v/v) show low iep’s due to chloride inclusion; 2) The purification methods explored (oxide suspension at pH~12 and dialysis) are inefficient; 3) TiO2 samples synthesized from an organic precursor salt under totally chloride-free conditions furnished an iep of 5.9 in excellent agreement with literature data; 4) Chloride specific adsorption on TiO2 is weak.
publishDate 1999
dc.date.none.fl_str_mv 1999-01-01
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=S0103-50531999000200003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000200003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531999000200003
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.10 n.2 1999
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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