A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum

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dc.contributor.author Segal, Felipe Modolo
dc.contributor.author Correa, Michelle Fidelis [UNIFESP]
dc.contributor.author Bacani, Rebeca
dc.contributor.author Castanheira, Bruna
dc.contributor.author Politi, Mario Jose
dc.contributor.author Brochsztain, Sergio
dc.contributor.author Triboni, Eduardo Rezende
dc.date.accessioned 2020-07-08T13:09:56Z
dc.date.available 2020-07-08T13:09:56Z
dc.date.issued 2018
dc.identifier http://dx.doi.org/10.1590/1980-5373-MR-2017-0674
dc.identifier.citation Materials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.
dc.identifier.issn 1516-1439
dc.identifier.uri https://repositorio.unifesp.br/handle/11600/54306
dc.description.abstract 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. en
dc.description.sponsorship Fundacao de Apoio a Pesquisa do Estado de Sao Paulo - FAPESP
dc.description.sponsorship CAPES
dc.description.sponsorship CNPq
dc.format.extent -
dc.language.iso eng
dc.publisher Univ Fed Sao Carlos, Dept Engenharia Materials
dc.relation.ispartof Materials Research-Ibero-American Journal Of Materials
dc.rights Acesso aberto
dc.subject aluminum and d-glucose en
dc.subject EtOH-H2O alkaline medium en
dc.subject chemical preparation en
dc.subject mesoporous gamma-Al2O3 en
dc.title A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum en
dc.type Artigo
dc.description.affiliation Univ Sao Paulo, Dept Engn Quim DEQ, Escola Engn Lorena, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP, Brazil
dc.description.affiliation Univ Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.affiliation Univ Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Santo Andre, SP, Brazil
dc.description.affiliation Univ Sao Paulo, Inst Quim, Ave Prof Lineu Prestes 748, BR-05508900 Sao Paulo, SP, Brazil
dc.description.affiliation Univ Sao Paulo, Escola Engn Lorena, Polo Ind, Dept Engn Mat DEMAR, Gleba Al-6 S-N, BR-12602810 Lorena, SP, Brazil
dc.description.affiliationUnifesp Univ Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.sponsorshipID FAPESP: 2015/06064-6, 2013/08166-5, 2016/05496-2
dc.identifier.file S1516-14392018005004109.pdf
dc.identifier.scielo S1516-14392018005004109
dc.identifier.doi 10.1590/1980-5373-MR-2017-0674
dc.description.source Web of Science
dc.identifier.wos WOS:000432383900037
dc.coverage Sao Carlos
dc.citation.volume 21
dc.citation.issue 1



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