A Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminum

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dc.citation.issue1
dc.citation.volume21
dc.contributor.authorSegal, Felipe Modolo
dc.contributor.authorCorrea, Michelle Fidelis [UNIFESP]
dc.contributor.authorBacani, Rebeca
dc.contributor.authorCastanheira, Bruna
dc.contributor.authorPoliti, Mario Jose
dc.contributor.authorBrochsztain, Sergio
dc.contributor.authorTriboni, Eduardo Rezende
dc.coverageSao Carlos
dc.date.accessioned2020-07-08T13:09:56Z
dc.date.available2020-07-08T13:09:56Z
dc.date.issued2018
dc.description.abstractMesoporous 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.affiliationUniv Sao Paulo, Dept Engn Quim DEQ, Escola Engn Lorena, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUniv Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Santo Andre, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Inst Quim, Ave Prof Lineu Prestes 748, BR-05508900 Sao Paulo, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Escola Engn Lorena, Polo Ind, Dept Engn Mat DEMAR, Gleba Al-6 S-N, BR-12602810 Lorena, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo UNIFESP, Dept Ciencias Exatas & Terra, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundacao de Apoio a Pesquisa do Estado de Sao Paulo - FAPESP
dc.description.sponsorshipCAPES
dc.description.sponsorshipCNPq
dc.description.sponsorshipIDFAPESP: 2015/06064-6, 2013/08166-5, 2016/05496-2
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2017-0674
dc.identifier.citationMaterials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 21, n. 1, p. -, 2018.
dc.identifier.doi10.1590/1980-5373-MR-2017-0674
dc.identifier.fileS1516-14392018005004109.pdf
dc.identifier.issn1516-1439
dc.identifier.scieloS1516-14392018005004109
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/54306
dc.identifier.wosWOS:000432383900037
dc.language.isoeng
dc.publisherUniv Fed Sao Carlos, Dept Engenharia Materials
dc.relation.ispartofMaterials Research-Ibero-American Journal Of Materials
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectaluminum and d-glucoseen
dc.subjectEtOH-H2O alkaline mediumen
dc.subjectchemical preparationen
dc.subjectmesoporous gamma-Al2O3en
dc.titleA Novel Synthesis Route of Mesoporous gamma Alumina from Polyoxohydroxide Aluminumen
dc.typeinfo:eu-repo/semantics/article
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