Brasil | Artigo

Structure and catalytic properties of sulfated zirconia foams

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorAlves-Rosa, Marinalva A. [UNESP]
dc.creatorMartins, Leandro [UNESP]
dc.creatorHammer, Peter [UNESP]
dc.creatorPulcinelli, Sandra Helena [UNESP]
dc.creatorSantilli, Celso Valentim [UNESP]
dc.date2015-03-18T15:53:03Z
dc.date2015-03-18T15:53:03Z
dc.date2014-11-01
dc.date.accessioned2023-09-09T11:02:52Z
dc.date.available2023-09-09T11:02:52Z
dc.identifierhttp://dx.doi.org/10.1007/s10971-013-3263-7
dc.identifierJournal Of Sol-gel Science And Technology. Dordrecht: Springer, v. 72, n. 2, p. 252-259, 2014.
dc.identifier0928-0707
dc.identifierhttp://hdl.handle.net/11449/116322
dc.identifier10.1007/s10971-013-3263-7
dc.identifierWOS:000343131000007
dc.identifier5782696565602340
dc.identifier6466841023506131
dc.identifier9971202585286967
dc.identifier5584298681870865
dc.identifier0000-0002-3823-0050
dc.identifier0000-0002-8356-8093
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8765809
dc.descriptionPorous sulfated zirconia foams were manufactured by a simple methodology based on the sol-gel process combined with a liquid foam template that used a surfactant mixture. A block copolymer (Pluronic F-127) and an anionic surfactant [sodium dodecylsulfate (SDS)] were mixed in different proportions in order to optimize the porous and surface properties of the ceramic material. By adjusting the SDS/Pluronic ratio, it was possible to obtain sulfated zirconia with a combination of macropores and mesopores that provided high porosity (a parts per thousand 90 %) and surface area (a parts per thousand 80 m(2) g(-1)). The sulfate groups linked to the zirconia surface stabilized the tetragonal phase, to the detriment of the thermodynamically stable monoclinic phase. The sulfate groups and the tetragonal phase decreased as a function of the amount of SDS in the liquid foam template. The combined porous and structural characteristics, together with surface acidity, provided enhanced catalytic activity when the sulfated zirconia foams were employed in the isopropanol dehydration reaction. A further benefit was the selectivity towards propene and negligible formation of acetone.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionUNESP Univ Estadual Paulista, Inst Chem, BR-14800900 Araraquara, Brazil
dc.descriptionUNESP Univ Estadual Paulista, Inst Chem, BR-14800900 Araraquara, Brazil
dc.descriptionFAPESP: 07/53073-4
dc.descriptionFAPESP: 10/01449-3
dc.descriptionFAPESP: 12/10215-1
dc.format252-259
dc.languageeng
dc.publisherSpringer
dc.relationJournal Of Sol-gel Science And Technology
dc.relation1.745
dc.relation0,477
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectSulfated zirconia
dc.subjectPorous ceramic
dc.subjectSurfactants mixture
dc.subjectSol-gel
dc.subjectCatalytic isopropanol dehydration
dc.titleStructure and catalytic properties of sulfated zirconia foams
dc.typeArtigo


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