NDLI: Oxysulfate/oxysulfide of Tb$^{3+}$ obtained by thermal decomposition of terbium sulfate hydrates under different atmospheres

Content Provider	Springer Nature Link
Author	Rodrigues, R. V. Machado, L. C. Matos, J. R. Muri, E. J. B. Marins, A. A. L. Brito, H. F. Passos, C. A. C.
Copyright Year	2015
Abstract	The terbium oxysulfate/oxysulfide Tb$_{2}$O$_{2}$SO$_{4}$/Tb$_{2}$O$_{2}$S were prepared from two different precursors: Tb(DAS)$_{3}$·2H$_{2}$O and Tb$_{2}$(SO$_{4}$)$_{3}$·8H$_{2}$O, utilizing two different atmospheres of thermal decomposition. The reaction of Tb$_{4}$O$_{7}$ with aqueous solution of H$_{2}$SO$_{4}$ (2 mol L$^{−1}$) produces Tb$_{2}$(SO$_{4}$)$_{3}$·8H$_{2}$O; after isolation and purification, it was reacted with Ba(DAS)$_{2}$·H$_{2}$O in aqueous solution to produce Tb$_{2}$(DAS)$_{3}$·2H$_{2}$O precursor. Both of the terbium sulfonate Tb(DAS)$_{3}$·2H$_{2}$O and terbium sulfate Tb$_{2}$(SO$_{4}$)$_{3}$·8H$_{2}$O precursors were analyzed in two different atmospheres of thermal treatment; in air atmosphere, terbium oxysulfate Tb$_{2}$O$_{2}$SO$_{4}$ was obtained as the end product; and in reducing (CO) atmosphere, terbium oxysulfide Tb$_{2}$O$_{2}$S one was obtained. Thus, it was observed that the change of precursor can result in obtaining different size of particles. Moreover, it was also observed that the terbium oxysulfate Tb$_{2}$O$_{2}$SO$_{4}$ obtained from sulfonate precursor at 1223 K, while from sulfate one at 1323 K. Similarly, the terbium oxysulfide Tb$_{2}$O$_{2}$S obtained from both sulfonate and sulfate precursors did not show significant difference, at 1013 K from sulfonate and 1033 K from sulfate precursor.
Starting Page	765
Ending Page	773
Page Count	9
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	122
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Decomposition Tb(DAS)$_{3}$·2H$_{2}$O Tb$_{2}$(SO$_{4}$)$_{3}$·8H$_{2}$O XRD SEM TG Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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