Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.

Detalhes bibliográficos
Autor(a) principal: Fajardo, Humberto Vieira
Data de Publicação: 2012
Outros Autores: Longo, Elson, Leite, Edson Roberto, Libanori, Rafael
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/4987
http://dx.doi.org/10.1590/S1516-14392012005000023
Resumo: In the present study, TiO2 nanopowder was partially coated with Y2O3 precursors generated by a sol-gel modified route. The system of nanocoated particles formed an ultra thin structure on the TiO2 surfaces. The modified nanoparticles were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) analysis, Zeta potential and surface area through N2 fisisorption measurements. Bioethanol dehydration was used as a probe reaction to investigate the modifications on the nanoparticles surface. The process led to the obtainment of nanoparticles with important surface characteristics and catalytic behavior in the bioethanol dehydration reaction, with improved activity and particular selectivity in comparison to their non-coated analogs. The ethylene production was disfavored and selectivity toward acetaldehyde, hydrogen and ethane increased over modified nanoparticles.
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spelling Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.CatalysisSurface modificationsTitaniaCoatingIn the present study, TiO2 nanopowder was partially coated with Y2O3 precursors generated by a sol-gel modified route. The system of nanocoated particles formed an ultra thin structure on the TiO2 surfaces. The modified nanoparticles were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) analysis, Zeta potential and surface area through N2 fisisorption measurements. Bioethanol dehydration was used as a probe reaction to investigate the modifications on the nanoparticles surface. The process led to the obtainment of nanoparticles with important surface characteristics and catalytic behavior in the bioethanol dehydration reaction, with improved activity and particular selectivity in comparison to their non-coated analogs. The ethylene production was disfavored and selectivity toward acetaldehyde, hydrogen and ethane increased over modified nanoparticles.2015-04-09T11:02:47Z2015-04-09T11:02:47Z2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfFAJARDO, H. V. et al. Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction. Materials Research, São Carlos, v. 15, p. 285-290, 2012. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200018&lng=pt&nrm=iso&tlng=pt>. Acesso em: 02 fev. 2015.1516-1439http://www.repositorio.ufop.br/handle/123456789/4987http://dx.doi.org/10.1590/S1516-14392012005000023O periódico Materials Research dá permissão ao RI/UFOP para depositar uma cópia eletrônica dos artigos publicados por esse periódico em que ao menos um dos autores é aluno ou professor da UFOP. Contato via e-mail em 25 out. 2013.info:eu-repo/semantics/openAccessFajardo, Humberto VieiraLongo, ElsonLeite, Edson RobertoLibanori, Rafaelengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOP2019-07-09T14:19:48Zoai:repositorio.ufop.br:123456789/4987Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-07-09T14:19:48Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
title Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
spellingShingle Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
Fajardo, Humberto Vieira
Catalysis
Surface modifications
Titania
Coating
title_short Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
title_full Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
title_fullStr Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
title_full_unstemmed Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
title_sort Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction.
author Fajardo, Humberto Vieira
author_facet Fajardo, Humberto Vieira
Longo, Elson
Leite, Edson Roberto
Libanori, Rafael
author_role author
author2 Longo, Elson
Leite, Edson Roberto
Libanori, Rafael
author2_role author
author
author
dc.contributor.author.fl_str_mv Fajardo, Humberto Vieira
Longo, Elson
Leite, Edson Roberto
Libanori, Rafael
dc.subject.por.fl_str_mv Catalysis
Surface modifications
Titania
Coating
topic Catalysis
Surface modifications
Titania
Coating
description In the present study, TiO2 nanopowder was partially coated with Y2O3 precursors generated by a sol-gel modified route. The system of nanocoated particles formed an ultra thin structure on the TiO2 surfaces. The modified nanoparticles were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD) analysis, Zeta potential and surface area through N2 fisisorption measurements. Bioethanol dehydration was used as a probe reaction to investigate the modifications on the nanoparticles surface. The process led to the obtainment of nanoparticles with important surface characteristics and catalytic behavior in the bioethanol dehydration reaction, with improved activity and particular selectivity in comparison to their non-coated analogs. The ethylene production was disfavored and selectivity toward acetaldehyde, hydrogen and ethane increased over modified nanoparticles.
publishDate 2012
dc.date.none.fl_str_mv 2012
2015-04-09T11:02:47Z
2015-04-09T11:02:47Z
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 FAJARDO, H. V. et al. Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction. Materials Research, São Carlos, v. 15, p. 285-290, 2012. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200018&lng=pt&nrm=iso&tlng=pt>. Acesso em: 02 fev. 2015.
1516-1439
http://www.repositorio.ufop.br/handle/123456789/4987
http://dx.doi.org/10.1590/S1516-14392012005000023
identifier_str_mv FAJARDO, H. V. et al. Synthesis, characterization and catalytic properties of nanocrystaline Y2O3-coated TiO2 in the ethanol dehydration reaction. Materials Research, São Carlos, v. 15, p. 285-290, 2012. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200018&lng=pt&nrm=iso&tlng=pt>. Acesso em: 02 fev. 2015.
1516-1439
url http://www.repositorio.ufop.br/handle/123456789/4987
http://dx.doi.org/10.1590/S1516-14392012005000023
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
_version_ 1813002845575708672

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