Deposition of colloidal hematite onto mercury from water-ethanol mixtures

Detalhes bibliográficos
Autor(a) principal: Andrade,Estela María
Data de Publicação: 1997
Outros Autores: Molina,Fernando Víctor, Posadas,Dionisio
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=S0103-50531997000400009
Resumo: The adherence of hematite (aFe2O3) particles onto mercury electrodes in water-ethanol mixtures has been studied by counting using optical microscope images. The number of attached particles, when the ethanol content is small, decreases as the ethanol concentration increases. At a mole fraction of ethanol near to 0.2, the number of particles goes through a minimum and then it increases with ethanol concentration. When the electrode potential is modified, curves of the number of particles vs. ethanol mole fraction with the same shape are found, but which cross each other. The dependence on the ethanol concentration can be explained based on the dependence of particle/solution and metal/solution interaction energies with the solvent composition.
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spelling Deposition of colloidal hematite onto mercury from water-ethanol mixtureshematite adhesionmetal surfacewater-ethanol mixturesThe adherence of hematite (aFe2O3) particles onto mercury electrodes in water-ethanol mixtures has been studied by counting using optical microscope images. The number of attached particles, when the ethanol content is small, decreases as the ethanol concentration increases. At a mole fraction of ethanol near to 0.2, the number of particles goes through a minimum and then it increases with ethanol concentration. When the electrode potential is modified, curves of the number of particles vs. ethanol mole fraction with the same shape are found, but which cross each other. The dependence on the ethanol concentration can be explained based on the dependence of particle/solution and metal/solution interaction energies with the solvent composition.Sociedade Brasileira de Química1997-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000400009Journal of the Brazilian Chemical Society v.8 n.4 1997reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531997000400009info:eu-repo/semantics/openAccessAndrade,Estela MaríaMolina,Fernando VíctorPosadas,Dionisioeng2010-11-19T00:00:00Zoai:scielo:S0103-50531997000400009Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2010-11-19T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Deposition of colloidal hematite onto mercury from water-ethanol mixtures
title Deposition of colloidal hematite onto mercury from water-ethanol mixtures
spellingShingle Deposition of colloidal hematite onto mercury from water-ethanol mixtures
Andrade,Estela María
hematite adhesion
metal surface
water-ethanol mixtures
title_short Deposition of colloidal hematite onto mercury from water-ethanol mixtures
title_full Deposition of colloidal hematite onto mercury from water-ethanol mixtures
title_fullStr Deposition of colloidal hematite onto mercury from water-ethanol mixtures
title_full_unstemmed Deposition of colloidal hematite onto mercury from water-ethanol mixtures
title_sort Deposition of colloidal hematite onto mercury from water-ethanol mixtures
author Andrade,Estela María
author_facet Andrade,Estela María
Molina,Fernando Víctor
Posadas,Dionisio
author_role author
author2 Molina,Fernando Víctor
Posadas,Dionisio
author2_role author
author
dc.contributor.author.fl_str_mv Andrade,Estela María
Molina,Fernando Víctor
Posadas,Dionisio
dc.subject.por.fl_str_mv hematite adhesion
metal surface
water-ethanol mixtures
topic hematite adhesion
metal surface
water-ethanol mixtures
description The adherence of hematite (aFe2O3) particles onto mercury electrodes in water-ethanol mixtures has been studied by counting using optical microscope images. The number of attached particles, when the ethanol content is small, decreases as the ethanol concentration increases. At a mole fraction of ethanol near to 0.2, the number of particles goes through a minimum and then it increases with ethanol concentration. When the electrode potential is modified, curves of the number of particles vs. ethanol mole fraction with the same shape are found, but which cross each other. The dependence on the ethanol concentration can be explained based on the dependence of particle/solution and metal/solution interaction energies with the solvent composition.
publishDate 1997
dc.date.none.fl_str_mv 1997-01-01
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=S0103-50531997000400009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000400009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531997000400009
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.8 n.4 1997
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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