View PDF Version
 
DOI: 10.1039/A701540B (Paper) Reference Section for: J. Mater. Chem., 1997, 7, 2113-2116

Preparation and characterization of uniform, spherical particles of Y2O2S and Y2O2S:Eu

(Note: The full text of this document is currently only available in the PDF Version )

Ligia Delgado da Vila, Elizabeth Berwerth Stucchi and Marian Rosaly Davolos

Abstract

The preparation of spherical Y2O2S and Y2O2S:Eu particles using a solid–gas reaction of monodispersed precursors with elemental sulfur vapor under an argon atmosphere has been investigated. The precursors, undoped and doped yttrium basic carbonates, are synthesized by aging a stock solution containing the respective cation chloride and urea at 82–84 °C. Y2O2S and Y2O2S:Eu were characterized in terms of their composition, crystallinity and morphology by chemical analysis, X-ray powder diffraction (XRD), IR spectroscopy, and scanning electron microscopy (SEM). The Eu-doped oxysulfide was also characterized by atomic absorption spectrophotometry and luminescence spectroscopy. The spherical morphology of oxysulfide products and of basic carbonate precursors suggests a topotatic inter-relationship between both compounds.

References

  1. P. N. Yocom, US Pat., 3 418 247, 1968 Search PubMed .
  2. (a) K. Sowa, M. Tanabe, S. Furukawa, Y. Nakanishi and Y. Hatanaka, Electroluminescence, Proc. Int. Workshop 6th, 1992, p. 315 Search PubMed ; (b) K. Sowa, M. Tanabe, S. Furukawa, Y. Nakanishi and Y. Hatanaka, Jpn. Appl. Phys., 1993, 32, 12A, 5601 Search PubMed .
  3. Y. Her, E. Matijevic and W. R. Wilcox, J. Mater. Sci. Lett., 1992, 11, 1629 CrossRef CAS .
  4. L. H. Brixner, Mater. Chem. Phys., 1987, 16, 253 CrossRef CAS .
  5. (a) E. Matijevic, CHEMT ECH, 1991, 21, 176 CAS ; (b) E. Matijevic, Annu. Rev. Mater. Sci., 1985, 15, 483 Search PubMed .
  6. (a) M. Leskelä, Res. Pap., 1980, 64, 39 Search PubMed ; (b) O. Kanehisa, T. Kano and H. Yamamoto, J. Electrochem. Soc., 1985, 132, 2023 CAS .
  7. J. M. Luiz, E. B. Stucchi and N. Barelli, Eur. J. Solid State Inorg. Chem., 1996, 33, 321 CAS .
  8. E. Matijevic and W. P. Hsu, J. Colloid Interface Sci., 1987, 118, 506 CAS .
  9. D. Sordelet and M. Akinc, J. Colloid Interface Sci., 1987, 122, 47 CrossRef CAS .
  10. M. F. Santos, Estudo de Precursores para Materiais Luminescentes: Hidroxicarbonatos de ítrio e de Gadolínio Dopados, M. Sc. Dissertation, Instituto de Química, UNESP, Araraquara, 1993 Search PubMed .
  11. JCPDS 24-1424 .
  12. J. R. Ferraro, Low-Frequency Vibrations of Inorganic and Coordination Compounds, Plenum Press, New York, 1971 Search PubMed .
  13. O. J. Sovers and T. Yoshioka, J. Chem. Phys., 1968, 49, 4945 CrossRef CAS .
  14. H. Forest and G. Ban, J. Electrochem. Soc., 1969, 116, 474 CAS .
Click here to see how this site uses Cookies. View our privacy policy here.