Formation of oxysulfide LnO2S2 and oxysulfate LnO2SO4 phases in the thermal decomposition process of lanthanide sulfonates (Ln = La, Sm)

被引：14

作者：

Machado, Luiz Carlos ^{[1
]}

D'Orlando de Azeredo, Marcos Tadeu ^{[2
]}

Soares Correa, Hamilton Perez ^{[3
]}

Matos, Jivaldo do Rosario ^{[4
]}

Mazali, Italo Odone ^{[5
]}

机构：

[1] Univ Fed Espirito Santo, Dept Quim, Lab Prod Novos Mat, BR-29075910 Vitoria, ES, Brazil

[2] Univ Fed Espirito Santo, Dept Fis, Lab Fis Aplicada, BR-29075910 Vitoria, ES, Brazil

[3] Univ Fed Mato Grosso do Sul, Lab Catalise & Ceram Avancadas, Campo Grande, Brazil

[4] Univ Sao Paulo, Inst Quim, Lab Anal Term Prof Ivo Giolito, BR-05508000 Sao Paulo, Brazil

[5] Univ Estadual Campinas, Inst Quim, Lab Quim Estado Solido, BR-13084971 Campinas, SP, Brazil

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2012年 / 107卷 / 01期

关键词：

Sulfonates; Thermal decomposition; Rietveld analysis; REFINEMENT;

D O I：

10.1007/s10973-011-1451-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This study investigates two lanthanide compounds (La3+ and Sm3+) obtained in water/ethyl alcohol solutions employing the anionic surfactant diphenyl-4-amine sulfonate (DAS) as ligand. Both sulfonates were characterized through IR, TG/DTG (O-2 and N-2). The thermal treatment of both compounds at 1273 K under air leaves residues containing variable percentages of lanthanide oxysulfide/oxysulfate phases shown by synchrotron high-resolution XRD pattern including the Rietveld analysis. The phase distributions found in the residues evidence the differences in the relative stability of the precursors.

引用

页码：305 / 311

页数：7

共 22 条

[1] Interaction of ester and acid groups containing organic compounds with iron oxide surfaces
Beentjes, PCJ
Van Den Brand, J
De Wit, JHW
[J]. JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 2006, 20 (01) : 1 - 18
[2] Bellamy L.J., 1980, The Infrared Spectra of Complex MoleculesAdvances in Infrared Group Frequencies, VVolume 2
[3] Two Ce(SO4)2•4H2O polymorphs:: Crystal structure and thermal behavior
Casari, Barbara M.
Langer, Vratislav
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2007, 180 (05) : 1616 - 1622
[4] A CORRECTION FOR POWDER DIFFRACTION PEAK ASYMMETRY DUE TO AXIAL DIVERGENCE
FINGER, LW
COX, DE
JEPHCOAT, AP
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1994, 27 : 892 - 900
[5] X-ray structural study on the different redox behavior of La and Pr oxysulfates/oxysulfides
Ikeue, Keita
Kawano, Tomoatsu
Eto, Masakazu
Zhang, Dongjie
Machida, Masato
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 451 (1-2) : 338 - 340
[6] Larson A. C., 2000, REPORT LAUR 86 748
[7] Synthesis, physical and optical properties, and electronic structure of the rare-earth oxysulfides Ln2O2S (Ln = Sm, Eu)
Llanos, J
Sánchez, V
Mujica, C
Buljan, A
[J]. MATERIALS RESEARCH BULLETIN, 2002, 37 (14) : 2285 - 2291
[8] Structure refinement of samarium monothio oxide
Llanos, J
Mujica, C
Henríquez, A
Gómez-Romero, P
Molins, E
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 316 (1-2) : 90 - 92
[9] Complexation of the Fe(III) and Fe(II) sulphates with diphenyl-4-amine barium sulphonate (DAS) Synthesis, thermogravimetric and spectroscopic studies
Machado, L. C.
Marins, A. A. L.
Muri, E. J. B.
Biondo, A.
Matos, J. do R.
Mazali, I. O.
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2009, 97 (01) : 289 - 296
[10] Reaction products between sodium diphenyl-amine-4-sulfonate and hydrated LaCl3 -: Thermogravimetric and spectroscopic study
Machado, LC
Marins, AAL
Muri, EJB
Lacerda, JAS
Balthar, VO
Fulvio, PF
Freitas, JCC
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2004, 75 (02) : 615 - 621

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