Studies on Fe-modified nanostructured trititanates

Detalhes bibliográficos
Autor(a) principal: Morgado Junior, Edisson
Data de Publicação: 2011
Outros Autores: Marinkovic, Bojan, Jardim, Paula Mendes, Abreu, Marco Antonio Santos de, Rocha, Maria da Graça Martins Carneiro da, Bargiela, Pascal
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5523
Resumo: Acesso restrito: Texto completo. p. 118-127.
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spelling Morgado Junior, EdissonMarinkovic, BojanJardim, Paula MendesAbreu, Marco Antonio Santos deRocha, Maria da Graça Martins Carneiro daBargiela, PascalMorgado Junior, EdissonMarinkovic, BojanJardim, Paula MendesAbreu, Marco Antonio Santos deRocha, Maria da Graça Martins Carneiro daBargiela, Pascal2012-03-07T19:16:16Z20110254-0584http://www.repositorio.ufba.br/ri/handle/ri/5523v. 338, n. 1-2Acesso restrito: Texto completo. p. 118-127.1D nanostructured sodium trititanate was synthesized by alkali hydrothermal treatment of TiO2 anatase, coexisting with incompletely converted precursors like nanosheets and poorly crystalline aggregates. This product easily exchanged with Fe3+ at room temperature to saturation at approximately 8 wt% Fe,following the Langmuir adsorption model. Iron exchange caused changes on the structural (interlayer shrinkage) and optical properties of the nanomaterial without affecting significantly its original morphology and mesoporous structure. According to consistent XRD and TEM/EDS data, iron was saturated within the interlayers of the 1D nanostructured particles at a lower content as compared to the coexisting poorly crystalline aggregates. Based on XPS results iron was found to be also in a lower oxidation state Fe2+, likely on the layered surface of the 1D nanostructured particles, through a mechanism tentatively explained by formation of structural iron defects promoted by the acidic medium. The iron modified trititanate nanostructure (Fe/TTNS) is stable up to 400 ◦C and at high temperatures it is eventually transformed into rutile(TiO2) and pseudobrookite (Fe2TiO5), whereas some freudenbergite phase (Na2Fe2Ti6O16) is generated due to residual sodium.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-03-07T19:16:16Z No. of bitstreams: 1 C__Documents and Settings_rep...t.default_Cache_B_D9_09898d01.pdf: 1006465 bytes, checksum: 5ea7e9b3525b2775e7b533068e24ddc5 (MD5)Made available in DSpace on 2012-03-07T19:16:16Z (GMT). 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dc.title.pt_BR.fl_str_mv Studies on Fe-modified nanostructured trititanates
dc.title.alternative.pt_BR.fl_str_mv Journal of Molecular Catalysis A-Chemical
title Studies on Fe-modified nanostructured trititanates
spellingShingle Studies on Fe-modified nanostructured trititanates
Morgado Junior, Edisson
Titanate,
TiO2
Anatase,
1D nanomaterials
Iron
Thermal transformation
title_short Studies on Fe-modified nanostructured trititanates
title_full Studies on Fe-modified nanostructured trititanates
title_fullStr Studies on Fe-modified nanostructured trititanates
title_full_unstemmed Studies on Fe-modified nanostructured trititanates
title_sort Studies on Fe-modified nanostructured trititanates
author Morgado Junior, Edisson
author_facet Morgado Junior, Edisson
Marinkovic, Bojan
Jardim, Paula Mendes
Abreu, Marco Antonio Santos de
Rocha, Maria da Graça Martins Carneiro da
Bargiela, Pascal
author_role author
author2 Marinkovic, Bojan
Jardim, Paula Mendes
Abreu, Marco Antonio Santos de
Rocha, Maria da Graça Martins Carneiro da
Bargiela, Pascal
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Morgado Junior, Edisson
Marinkovic, Bojan
Jardim, Paula Mendes
Abreu, Marco Antonio Santos de
Rocha, Maria da Graça Martins Carneiro da
Bargiela, Pascal
Morgado Junior, Edisson
Marinkovic, Bojan
Jardim, Paula Mendes
Abreu, Marco Antonio Santos de
Rocha, Maria da Graça Martins Carneiro da
Bargiela, Pascal
dc.subject.por.fl_str_mv Titanate,
TiO2
Anatase,
1D nanomaterials
Iron
Thermal transformation
topic Titanate,
TiO2
Anatase,
1D nanomaterials
Iron
Thermal transformation
description Acesso restrito: Texto completo. p. 118-127.
publishDate 2011
dc.date.issued.fl_str_mv 2011
dc.date.accessioned.fl_str_mv 2012-03-07T19:16:16Z
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 http://www.repositorio.ufba.br/ri/handle/ri/5523
dc.identifier.issn.none.fl_str_mv 0254-0584
dc.identifier.number.pt_BR.fl_str_mv v. 338, n. 1-2
identifier_str_mv 0254-0584
v. 338, n. 1-2
url http://www.repositorio.ufba.br/ri/handle/ri/5523
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.source.pt_BR.fl_str_mv DOI: 10.1016/j.matchemphys.2010.11.054
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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