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Thermal Annealing Effects in Vanadium Pentoxide Films Intercalated with Eu3+

Published online by Cambridge University Press:  10 February 2011

H. P. Oliveira
Affiliation:
Departamento de Quimica, FFCLRP/Universidade de São Paulo, Ribeirão Preto, SP, CEP 14040–901, Brazil. ([email protected])
J. M. Rosolen
Affiliation:
Departamento de Quimica, FFCLRP/Universidade de São Paulo, Ribeirão Preto, SP, CEP 14040–901, Brazil.
P. S. Calefi
Affiliation:
Departamento de Quimica, FFCLRP/Universidade de São Paulo, Ribeirão Preto, SP, CEP 14040–901, Brazil.
C. A. Brunello
Affiliation:
Departamento de Física e Matemática, FFCLRP/Universidade de São Paulo.
C. F. O. Graeff
Affiliation:
Departamento de Física e Matemática, FFCLRP/Universidade de São Paulo.
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Abstract

This work reports on the spectroscopic properties of europium ions intercalated in a vanadium pentoxide matrix, as well as the effects of thermal treatment on its structural and electronic properties. X-ray diffraction, TG/DTA, ESR, luminescence as well as XANES were used in order to characterize the intercalation compound. For the as grown samples, the intercalation of Eu3+ is observed to have little effect in the V2O5 lamellar structure, however the inter-planar spacing grows from 1.19 nm to 1.33nm for a 10% Eu3+ content. The luminescence for the as grown samples are dominated by the host, the same happening with the ESR spectra. However ESR data show that the presence of Eu3+ in the host induces the partial reduction of vanadium to V4+ For samples treated above 873K the luminescence excitation spectra presents a new shoulder at 300 nm, which when excited shows emissions bands typical of the Eu3+ In ESR the same thermal treatments are marked by the appearance of a new broad line assigned to ferromagnetic EuO, as well as the partial oxidation of V4+ to V5+ This result may be correlated to suppression of Eu3+ luminescence due to the presence of water in the neighborhood of Eu3+.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1. Livage, J. and Collorgues, R., Mater. Sci. Eng. 23, 297 (1976).10.1016/0025-5416(76)90213-5Google Scholar
2. Bullot, J., Gallais, O., Gauthier, M. and Livage, J., App. Phys. Lett. 36 986 (1980).10.1063/1.91392Google Scholar
3. Lampert, C.M., Solar Energy Maier., 11, 1 (1984).10.1016/0165-1633(84)90024-8Google Scholar
4. Kanatzidis, M.G., Wu, C.G., Marcy, H.O. and Kannewurf, C.R., J. Am. Chem. Soc, 111 4139 (1989).10.1021/ja00193a078Google Scholar
5. Liu, Y.J., Cowen, J.A., Kaplan, T.A., DeGroot, D.C., Schindler, J., Kannewurf, C.R. and Kanatzidis, M.G., Chem. Mater. 7, 1616 (1995).10.1021/cm00057a007Google Scholar
6. Liu, Y.J., Schindler, J., DeGroot, D.C.,, Kannewurf, C.R., Hirpo, W. and Kanatzidis, M.G., Chem. Mater. 8, 525 (1996).10.1021/cm950366oGoogle Scholar
7. Toma, H.E., Oliveira, H.P. and Rechenberg, H.R., J. Inclusion Phenomena and Molecular Recognition in Chemistry 17, 351 (1994).10.1007/BF00707131Google Scholar
8. Lakshmi, B.B., Patrissi, C.J. and Martin, C.R., Chem Mater. 9, 2544 (1997).10.1021/cm970268yGoogle Scholar
9. Mullica, D.F., Sappenfield, E.L., Abraham, M.M., Chakoumakos, B.C. and Boatner, L.A., Inorg. Chim. Acta 248, 85 (1996).10.1016/0020-1693(95)04971-1Google Scholar
10. Erdei, S., N Rodriguez, M., Ainger, F.W., White, W.B., Ravichandran, D. and Cross, L.E., J. Mater. Chem. 8(1), 99 (1998).10.1039/a706330jGoogle Scholar
11. Gharbi, N., Sanchez, C., Livage, J., Lemerle, J., Nejem, L. and Lefebvre, J., Inorg. Chem. 21, 2758 (1982).10.1021/ic00137a043Google Scholar
12. Wong, J., Lyte, F.W., Messmer, R.P. and Maylotte, D.H., Phys. Ver. B 30 (1984) 5596.Google Scholar
13. Babonneau, F., Barboux, P., Josien, F.A. and Livage, J., J de Chimie Physique 82, 761 (1985).10.1051/jcp/1985820761Google Scholar
14. Seehra, M.S. and Sheers, W.S., Physica 85B, 142 (1977).Google Scholar