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: | https://repositorio.unifesp.br/handle/11600/54306 http://dx.doi.org/10.1590/1980-5373-MR-2017-0674 |
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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Segal, Felipe ModoloCorrea, Michelle Fidelis [UNIFESP]Bacani, RebecaCastanheira, BrunaPoliti, Mario JoseBrochsztain, SergioTriboni, Eduardo Rezende2020-07-08T13:09:56Z2020-07-08T13:09:56Z2018Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.1516-1439https://repositorio.unifesp.br/handle/11600/54306http://dx.doi.org/10.1590/1980-5373-MR-2017-0674S1516-14392018005004109.pdfS1516-1439201800500410910.1590/1980-5373-MR-2017-0674WOS:000432383900037Mesoporous 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.Fundacao de Apoio a Pesquisa do Estado de Sao Paulo - FAPESPCAPESCNPqUniv 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, BrazilFAPESP: 2015/06064-6, 2013/08166-5, 2016/05496-2Web of Science-engUniv Fed Sao Carlos, Dept Engenharia MaterialsMaterials Research-Ibero-American Journal Of Materialsaluminum and d-glucoseEtOH-H2O alkaline mediumchemical preparationmesoporous gamma-Al2O3A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminuminfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleSao Carlos211info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALS1516-14392018005004109.pdfapplication/pdf1004748${dspace.ui.url}/bitstream/11600/54306/1/S1516-14392018005004109.pdf21fbbe1ab38adfc5f5c4932878735d1bMD51open accessTEXTS1516-14392018005004109.pdf.txtS1516-14392018005004109.pdf.txtExtracted texttext/plain32549${dspace.ui.url}/bitstream/11600/54306/8/S1516-14392018005004109.pdf.txtb4129605abe6769aa8c13ae8ac5b8d6bMD58open accessTHUMBNAILS1516-14392018005004109.pdf.jpgS1516-14392018005004109.pdf.jpgIM Thumbnailimage/jpeg6657${dspace.ui.url}/bitstream/11600/54306/10/S1516-14392018005004109.pdf.jpg5183c548d977951edd0a7be5f9cdf3ccMD510open access11600/543062023-06-05 19:30:45.746open accessoai:repositorio.unifesp.br:11600/54306Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:30:45Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.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.eng.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.issued.fl_str_mv |
2018 |
dc.date.accessioned.fl_str_mv |
2020-07-08T13:09:56Z |
dc.date.available.fl_str_mv |
2020-07-08T13:09:56Z |
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.citation.fl_str_mv |
Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018. |
dc.identifier.uri.fl_str_mv |
https://repositorio.unifesp.br/handle/11600/54306 http://dx.doi.org/10.1590/1980-5373-MR-2017-0674 |
dc.identifier.issn.none.fl_str_mv |
1516-1439 |
dc.identifier.file.none.fl_str_mv |
S1516-14392018005004109.pdf |
dc.identifier.scielo.none.fl_str_mv |
S1516-14392018005004109 |
dc.identifier.doi.none.fl_str_mv |
10.1590/1980-5373-MR-2017-0674 |
dc.identifier.wos.none.fl_str_mv |
WOS:000432383900037 |
identifier_str_mv |
Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018. 1516-1439 S1516-14392018005004109.pdf S1516-14392018005004109 10.1590/1980-5373-MR-2017-0674 WOS:000432383900037 |
url |
https://repositorio.unifesp.br/handle/11600/54306 http://dx.doi.org/10.1590/1980-5373-MR-2017-0674 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.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 |
- |
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 |
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