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dc.contributor.authorPazinato, Julia Cristina Oliveirapt_BR
dc.contributor.authorVilletti, Marcos Antoniopt_BR
dc.contributor.authorMertins, Omarpt_BR
dc.contributor.authorSilva, Emerson Rodrigo dapt_BR
dc.contributor.authorGarcia, Irene Teresinha Santospt_BR
dc.date.accessioned2020-01-31T04:12:46Zpt_BR
dc.date.issued2019pt_BR
dc.identifier.issn0103-5053pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/205203pt_BR
dc.description.abstractRecent studies on tungsten oxide preparation are mainly motivated by its applications in smart windows, energy harvesting and, recently, in cancer therapy. Peroxotungstic acid (PTA) is an important precursor to obtain tungsten oxide in an environmentally-friendly way, through the colloidal synthesis in aqueous media. Despite giving chemically pure products, PTA originates oxides with various morphologies depending on the experimental conditions, a subject open to discussion. PTA, in the presence of sodium dodecyl sulfate (SDS) as architecture-directing agent, was investigated in ethanol/water medium by small angle X-ray scattering (SAXS), fluorescence, surface tension and conductivity measurements; the morphology of tungsten oxide obtained from the precursor systems was also characterized by scanning electron microscopy (SEM). PTA/SDS/ethanol/water systems show a two-level organization in which small micelles are aggregated as fractal structures. There is an inverse correlation between gyration radius of the fractal structures of the PTA/SDS systems and particle size of the tungsten oxide films. The interaction of PTA with SDS is observed by reducing the Gibbs energy of micellization; also, it is evidenced that the supressive effect of PTA on pyrene emission is overrided in presence of SDS.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofJournal of the Brazilian Chemical Society. Vol. 30, n. 4 (2019), p. 752-763pt_BR
dc.rightsOpen Accessen
dc.subjectColloidal synthesisen
dc.subjectSíntese coloidalpt_BR
dc.subjectArchitecture-directing agenten
dc.subjectEstrutura fractalpt_BR
dc.subjectMetal de transiçãopt_BR
dc.subjectFractal structureen
dc.subjectÓxidospt_BR
dc.subjectTransition metal oxidesen
dc.titleInsights on Structuration of Peroxotungstic Acid in Aqueous Mediapt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001107046pt_BR
dc.type.originNacionalpt_BR


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