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Proceedings Paper

A novel organic-free sol-gel route to ceria-zirconia-alumina thin films and glassy products
Author(s): Elena V. Frolova; Mariya I. Ivanovskaya; Yuliya A. Kosareva; Vitalii P. Petranovskii; Sergio I. Fuentes
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Paper Abstract

Successful preparation of the Ce-Zr-Al oxide thin films and glassy products by a newly developed organic-free modification of the sol-gel technique is reported. The structural composition and some properties of the samples obtained were investigated by TEM, XRD, FTIR, ESR, UV-Vis, PL and XPS. The optical investigation of the obtained films together with ESR data indicate the appearance of the bulk Ce3+-defects (g⊥ = 1.962-1.967, g// = 1.938-1.940, assigned to 4f1 state, with concentration ~2•1018spin/g). The significant PL intensity rising at elevated temperature was related to spontaneous increasing of Ce3+ concentration in sol-gel samples under thermal dehydration. Also, an unexpected formation of intra-band gap states during thermal treatment of xerogels was manifested in UV-Vis spectra. This intra-band-gap states was attributed to the oxygen related defects that contribute to PL signal.

Paper Details

Date Published: 14 October 2004
PDF: 8 pages
Proc. SPIE 5513, Physical Chemistry of Interfaces and Nanomaterials III, (14 October 2004); doi: 10.1117/12.559709
Show Author Affiliations
Elena V. Frolova, Belarusian State Univ. (Belarus)
Mariya I. Ivanovskaya, Belarusian State Univ. (Belarus)
Yuliya A. Kosareva, Belarusian State Univ. (Belarus)
Vitalii P. Petranovskii, Univ. Nacional Autonoma de Mexico (Mexico)
Sergio I. Fuentes, Univ. Nacional Autonoma de Mexico (Mexico)

Published in SPIE Proceedings Vol. 5513:
Physical Chemistry of Interfaces and Nanomaterials III
Gregory V. Hartland; Xiao-Yang Zhu, Editor(s)

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