A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum

Detalhes bibliográficos
Autor(a) principal: Segal, Felipe Modolo
Data de Publicação: 2018
Outros Autores: Correa, Michelle Fidelis [UNIFESP], Bacani, Rebeca, Castanheira, Bruna, Politi, Mario Jose, Brochsztain, Sergio, Triboni, Eduardo Rezende
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNIFESP
Texto Completo: http://dx.doi.org/10.1590/1980-5373-MR-2017-0674
https://repositorio.unifesp.br/handle/11600/54306
Resumo: Mesoporous gamma-aluminas (gamma-Al2O3) were synthesized starting from an unusual precursor of polyoxohydroxide aluminum (POHA). This precursor was obtained from aluminum oxidation in alkaline water-ethanol solvent in the presence of d-glucose that induces the formation of a gel, which leads to the POAH powder after ethanolic treatment Precipitated POHAs were calcined at different temperatures (300, 400, 700 and 900 degrees C) resultmg m the metastable gamma-Al(2)0(3) phase. Whereas at 300 degrees C no gamma-Al(2)0(3) phase was formed, unexpectedly, mesoporous gamma-Al(2)0(3) was obtained at 400 degrees C having a high specific surface area (282 m(2)/g) and a narrow pore size distribution At higher temperatures, the aluminas had the expected decrease in surface area 166 m(2)/g (700 degrees C) and 129 m(2)/g (900 degrees C), respectively The structural change from POHA to alumina calcined at 400 degrees C occurs directly without the need to isolate the hydroxide or oxyhydroxide aluminum precursors Both POHA and transition aluminas were characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), N-2 sorption and Scanning Electron Microscopy (SEM) These findings show an alternative route to produce high standard aluminas.
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spelling A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminumaluminum and d-glucoseEtOH-H2O alkaline mediumchemical preparationmesoporous gamma-Al2O3Mesoporous gamma-aluminas (gamma-Al2O3) were synthesized starting from an unusual precursor of polyoxohydroxide aluminum (POHA). This precursor was obtained from aluminum oxidation in alkaline water-ethanol solvent in the presence of d-glucose that induces the formation of a gel, which leads to the POAH powder after ethanolic treatment Precipitated POHAs were calcined at different temperatures (300, 400, 700 and 900 degrees C) resultmg m the metastable gamma-Al(2)0(3) phase. Whereas at 300 degrees C no gamma-Al(2)0(3) phase was formed, unexpectedly, mesoporous gamma-Al(2)0(3) was obtained at 400 degrees C having a high specific surface area (282 m(2)/g) and a narrow pore size distribution At higher temperatures, the aluminas had the expected decrease in surface area 166 m(2)/g (700 degrees C) and 129 m(2)/g (900 degrees C), respectively The structural change from POHA to alumina calcined at 400 degrees C occurs directly without the need to isolate the hydroxide or oxyhydroxide aluminum precursors Both POHA and transition aluminas were characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), N-2 sorption and Scanning Electron Microscopy (SEM) These findings show an alternative route to produce high standard aluminas.Univ Sao Paulo, Dept Engn Quim DEQ, Escola Engn Lorena, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP, BrazilUniv Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, BrazilUniv Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Santo Andre, SP, BrazilUniv Sao Paulo, Inst Quim, Ave Prof Lineu Prestes 748, BR-05508900 Sao Paulo, SP, BrazilUniv Sao Paulo, Escola Engn Lorena, Polo Ind, Dept Engn Mat DEMAR, Gleba Al-6 S-N, BR-12602810 Lorena, SP, BrazilUniv Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, BrazilWeb of ScienceFundacao de Apoio a Pesquisa do Estado de Sao Paulo - FAPESPCAPESCNPqFAPESP: 2015/06064-6, 2013/08166-5, 2016/05496-2Univ Fed Sao Carlos, Dept Engenharia Materials2020-07-08T13:09:56Z2020-07-08T13:09:56Z2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion-application/pdfhttp://dx.doi.org/10.1590/1980-5373-MR-2017-0674Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.10.1590/1980-5373-MR-2017-0674S1516-14392018005004109.pdf1516-1439S1516-14392018005004109https://repositorio.unifesp.br/handle/11600/54306WOS:000432383900037engMaterials Research-Ibero-American Journal Of MaterialsSao Carlosinfo:eu-repo/semantics/openAccessSegal, Felipe ModoloCorrea, Michelle Fidelis [UNIFESP]Bacani, RebecaCastanheira, BrunaPoliti, Mario JoseBrochsztain, SergioTriboni, Eduardo Rezendereponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESP2024-08-08T19:09:31Zoai:repositorio.unifesp.br/:11600/54306Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestbiblioteca.csp@unifesp.bropendoar:34652024-08-08T19:09:31Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false
dc.title.none.fl_str_mv A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
title A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
spellingShingle A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
Segal, Felipe Modolo
aluminum and d-glucose
EtOH-H2O alkaline medium
chemical preparation
mesoporous gamma-Al2O3
title_short A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
title_full A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
title_fullStr A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
title_full_unstemmed A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
title_sort A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
author Segal, Felipe Modolo
author_facet Segal, Felipe Modolo
Correa, Michelle Fidelis [UNIFESP]
Bacani, Rebeca
Castanheira, Bruna
Politi, Mario Jose
Brochsztain, Sergio
Triboni, Eduardo Rezende
author_role author
author2 Correa, Michelle Fidelis [UNIFESP]
Bacani, Rebeca
Castanheira, Bruna
Politi, Mario Jose
Brochsztain, Sergio
Triboni, Eduardo Rezende
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Segal, Felipe Modolo
Correa, Michelle Fidelis [UNIFESP]
Bacani, Rebeca
Castanheira, Bruna
Politi, Mario Jose
Brochsztain, Sergio
Triboni, Eduardo Rezende
dc.subject.por.fl_str_mv aluminum and d-glucose
EtOH-H2O alkaline medium
chemical preparation
mesoporous gamma-Al2O3
topic aluminum and d-glucose
EtOH-H2O alkaline medium
chemical preparation
mesoporous gamma-Al2O3
description Mesoporous gamma-aluminas (gamma-Al2O3) were synthesized starting from an unusual precursor of polyoxohydroxide aluminum (POHA). This precursor was obtained from aluminum oxidation in alkaline water-ethanol solvent in the presence of d-glucose that induces the formation of a gel, which leads to the POAH powder after ethanolic treatment Precipitated POHAs were calcined at different temperatures (300, 400, 700 and 900 degrees C) resultmg m the metastable gamma-Al(2)0(3) phase. Whereas at 300 degrees C no gamma-Al(2)0(3) phase was formed, unexpectedly, mesoporous gamma-Al(2)0(3) was obtained at 400 degrees C having a high specific surface area (282 m(2)/g) and a narrow pore size distribution At higher temperatures, the aluminas had the expected decrease in surface area 166 m(2)/g (700 degrees C) and 129 m(2)/g (900 degrees C), respectively The structural change from POHA to alumina calcined at 400 degrees C occurs directly without the need to isolate the hydroxide or oxyhydroxide aluminum precursors Both POHA and transition aluminas were characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), N-2 sorption and Scanning Electron Microscopy (SEM) These findings show an alternative route to produce high standard aluminas.
publishDate 2018
dc.date.none.fl_str_mv 2018
2020-07-08T13:09:56Z
2020-07-08T13:09:56Z
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://dx.doi.org/10.1590/1980-5373-MR-2017-0674
Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.
10.1590/1980-5373-MR-2017-0674
S1516-14392018005004109.pdf
1516-1439
S1516-14392018005004109
https://repositorio.unifesp.br/handle/11600/54306
WOS:000432383900037
url http://dx.doi.org/10.1590/1980-5373-MR-2017-0674
https://repositorio.unifesp.br/handle/11600/54306
identifier_str_mv Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.
10.1590/1980-5373-MR-2017-0674
S1516-14392018005004109.pdf
1516-1439
S1516-14392018005004109
WOS:000432383900037
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Research-Ibero-American Journal Of Materials
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.coverage.none.fl_str_mv Sao Carlos
dc.publisher.none.fl_str_mv Univ Fed Sao Carlos, Dept Engenharia Materials
publisher.none.fl_str_mv Univ Fed Sao Carlos, Dept Engenharia Materials
dc.source.none.fl_str_mv reponame:Repositório Institucional da UNIFESP
instname:Universidade Federal de São Paulo (UNIFESP)
instacron:UNIFESP
instname_str Universidade Federal de São Paulo (UNIFESP)
instacron_str UNIFESP
institution UNIFESP
reponame_str Repositório Institucional da UNIFESP
collection Repositório Institucional da UNIFESP
repository.name.fl_str_mv Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)
repository.mail.fl_str_mv biblioteca.csp@unifesp.br
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