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XANES study on the valence transitions in cerium oxide nanoparticles by Jing Zhang; Ziyu Wu; Tao Liu; Tiandou Hu; Zhonghua Wu; Xin Ju is a Physics and Astronomy article available to read on EtoBox.

What is XANES study on the valence transitions in cerium oxide nanoparticles about?

The aim of this work is the determination of Ce environment and valence state in cerium oxide nanoparticles prepared by the microemulsion method. X-ray absorption near-edge structure measurements at Ce L~3~ edge were performed on the nanoparticles as a function of annealing temperature, ranging from 298K to 873K under air condition. The experimental results support the conclusion that Ce ion, in the investigated systems, is in trivalence state when the annealing temperature is below 473K. As the temperature increases up to 623K, the XANES spectrum shows the coexistence of Ce^3+^ and Ce^4+^states. When the temperature is higher than 623K, the spectra become identical to that of CeO~2~ with a distinct double-peak structure, corresponding to the Ce^4+^ state.

Who reads XANES study on the valence transitions in cerium oxide nanoparticles?

Author

Jing Zhang; Ziyu Wu; Tao Liu; Tiandou Hu; Zhonghua Wu; Xin Ju

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr) (ISSN 0909-0495)

Published

2001

Language

EN

Field

Physics and Astronomy (Physical Sciences)