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Issue 4, 2014
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XANES observations of the inhibition and promotion of anatase and rutile phases in silver containing films

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Abstract

X-ray absorption near-edge structure (XANES) spectroscopy has been applied to characterize the phase evolution of Ag–TiO2 films subjected to annealing treatments up to 1000 °C. Silver has been theoretically predicted as a rutile promoter in anatase powders lowering the transition temperature, however, no systematic studies on films have been reported yet. In this work, the Ti L2,3- and O K-edge in XANES spectra were used as fingerprints of the phase structure of the films. The results show that silver atoms strongly affect the transition of the initially amorphous films to the anatase structure, delaying the crystallization temperature up to 400 °C and, at the same time, promoting the subsequent phase transformation from anatase to rutile at temperatures as low as 600 °C. These results have been confirmed by X-Ray Diffraction (XRD) analysis as well as by High Resolution TEM images (HRTEM) of films.

Graphical abstract: XANES observations of the inhibition and promotion of anatase and rutile phases in silver containing films

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Publication details

The article was received on 31 Oct 2013, accepted on 20 Jan 2014 and first published on 28 Feb 2014


Article type: Paper
DOI: 10.1039/C3JA50354B
Citation: J. Anal. At. Spectrom., 2014,29, 736-742
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    XANES observations of the inhibition and promotion of anatase and rutile phases in silver containing films

    A. A. Mosquera, J. L. Endrino and J. M. Albella, J. Anal. At. Spectrom., 2014, 29, 736
    DOI: 10.1039/C3JA50354B

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