Agosto 2018 vol. 5 num. 1 - IX Encontro Científico de Física Aplicada

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Storage of oxygen in the interconversion R2O2S/R2O2SO4 obtained by thermal decomposition of sulfonate rare earth

Carvalho, M.A. ; Machado, L.C. ; Goldner, S. ; Rodrigues, R.V. ; Passos, C.A.C. ;

Artigo:

In this study, two compounds presenting characteristics different from each other were produced from the reaction between hydrated Eu+3 sulfate and Ba+2 diphenylamine-4-sulfonate using, respectively, aqueous solution for producing the Eu+3(C12H10NSO3)3.7H2O (A) compound and water/ethyl alcohol (7:1) solution for the Eu+3(C12H10NSO3)3.5H2O (B) production.The presence of alcohol molecules in the solution will interfere in the structural arrangement of anionic surfactant DAS- (diphenylamine-4-sulfonate) around the metal ions Eu3 allowing differentiation in the stoichiometric formulas, morphology, and thermal properties of these compounds and their derivatives. Thus, when treating both compounds under oxidizing atmosphere, we found different temperatures of the water loss and conversion of the intermediate pair oxydisulfate [Eu2O(SO4)2]/dioxysulfate [(Eu2O2SO4)]. However, the effect of water/surfactant/alcohol interactions in the metal ion structural arrangement becomes still more evident under reducing atmosphere. After this thermal treatment, significant changes were observed in the morphological characteristics and physical properties of the (Eu2O2S oxysulfide) in compound B with respect to compound A.

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Palavras-chave: Rare earth, Storage oxygen, Thermal analisys,

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DOI: 10.5151/ecfa2018-18

Referências bibliográficas
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Como citar:

Carvalho, M.A.; Machado, L.C.; Goldner, S.; Rodrigues, R.V.; Passos, C.A.C.; "Storage of oxygen in the interconversion R2O2S/R2O2SO4 obtained by thermal decomposition of sulfonate rare earth", p. 90-94 . In: . São Paulo: Blucher, 2018.
ISSN 2358-2359, DOI 10.5151/ecfa2018-18

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