Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
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=S0103-50532009000100025 |
Resumo: | This work reports the structural, morphological and vibrational properties of titanate nanotubes and nanoribbons obtained from bidimensional structures by hydrothermal treatment of TiO2 in aqueous NaOH solutions. The physical properties of these as-synthesized and heat-treated nanostructures are discussed in comparison with their bulk (Na2Ti3O7 and Na2Ti6O13) counterparts. The results obtained from several characterization techniques allowed to conclude that the layers of both as-synthesized nanotubes and nanoribbons are isostructural to the Na2Ti3O7 compound. However, in the nanotubes, the chemical bonds are deformed because of the curvature of walls while in the nanoribbons the layers present structural disorder due only the size effects. The thermal behavior of titanate nanoribbons is similar to those observed for titanate nanotubes. When thermally treated titanate nanoribbons change to bulk with a phase mixing of Na2Ti3O7 and Na2Ti6O13. We conclude in this work that the chemical composition of both the titanate nanotubes and the nanoribbons is the same, Na2-xHxTi3O7·nH2O (0 < x < 2) and Raman spectroscopy can be used for an easy and quick identification of both morphology and structure changes of the nanosized titanates. |
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Structural, morphological and vibrational properties of titanate nanotubes and nanoribbonstitanium oxidetitanate nanostructuresthermal treatmentphase transformationspectroscopyThis work reports the structural, morphological and vibrational properties of titanate nanotubes and nanoribbons obtained from bidimensional structures by hydrothermal treatment of TiO2 in aqueous NaOH solutions. The physical properties of these as-synthesized and heat-treated nanostructures are discussed in comparison with their bulk (Na2Ti3O7 and Na2Ti6O13) counterparts. The results obtained from several characterization techniques allowed to conclude that the layers of both as-synthesized nanotubes and nanoribbons are isostructural to the Na2Ti3O7 compound. However, in the nanotubes, the chemical bonds are deformed because of the curvature of walls while in the nanoribbons the layers present structural disorder due only the size effects. The thermal behavior of titanate nanoribbons is similar to those observed for titanate nanotubes. When thermally treated titanate nanoribbons change to bulk with a phase mixing of Na2Ti3O7 and Na2Ti6O13. We conclude in this work that the chemical composition of both the titanate nanotubes and the nanoribbons is the same, Na2-xHxTi3O7·nH2O (0 < x < 2) and Raman spectroscopy can be used for an easy and quick identification of both morphology and structure changes of the nanosized titanates.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100025Journal of the Brazilian Chemical Society v.20 n.1 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000100025info:eu-repo/semantics/openAccessViana,Bartolomeu C.Ferreira,Odair P.Souza Filho,Antonio G.Mendes Filho,JosueAlves,Oswaldo L.eng2009-01-15T00:00:00Zoai:scielo:S0103-50532009000100025Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-01-15T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
title |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
spellingShingle |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons Viana,Bartolomeu C. titanium oxide titanate nanostructures thermal treatment phase transformation spectroscopy |
title_short |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
title_full |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
title_fullStr |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
title_full_unstemmed |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
title_sort |
Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons |
author |
Viana,Bartolomeu C. |
author_facet |
Viana,Bartolomeu C. Ferreira,Odair P. Souza Filho,Antonio G. Mendes Filho,Josue Alves,Oswaldo L. |
author_role |
author |
author2 |
Ferreira,Odair P. Souza Filho,Antonio G. Mendes Filho,Josue Alves,Oswaldo L. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Viana,Bartolomeu C. Ferreira,Odair P. Souza Filho,Antonio G. Mendes Filho,Josue Alves,Oswaldo L. |
dc.subject.por.fl_str_mv |
titanium oxide titanate nanostructures thermal treatment phase transformation spectroscopy |
topic |
titanium oxide titanate nanostructures thermal treatment phase transformation spectroscopy |
description |
This work reports the structural, morphological and vibrational properties of titanate nanotubes and nanoribbons obtained from bidimensional structures by hydrothermal treatment of TiO2 in aqueous NaOH solutions. The physical properties of these as-synthesized and heat-treated nanostructures are discussed in comparison with their bulk (Na2Ti3O7 and Na2Ti6O13) counterparts. The results obtained from several characterization techniques allowed to conclude that the layers of both as-synthesized nanotubes and nanoribbons are isostructural to the Na2Ti3O7 compound. However, in the nanotubes, the chemical bonds are deformed because of the curvature of walls while in the nanoribbons the layers present structural disorder due only the size effects. The thermal behavior of titanate nanoribbons is similar to those observed for titanate nanotubes. When thermally treated titanate nanoribbons change to bulk with a phase mixing of Na2Ti3O7 and Na2Ti6O13. We conclude in this work that the chemical composition of both the titanate nanotubes and the nanoribbons is the same, Na2-xHxTi3O7·nH2O (0 < x < 2) and Raman spectroscopy can be used for an easy and quick identification of both morphology and structure changes of the nanosized titanates. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 |
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=S0103-50532009000100025 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100025 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532009000100025 |
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.20 n.1 2009 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 |
_version_ |
1750318169452445696 |