A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
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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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 |
_version_ |
1814268407048044544 |