Changes in the Chemical and Structural Properties of Nanocomposite Ag:TiO2 Films during Photochromic Transitions

N. Crespo-Monteiro 1 N. Destouches 1 Thierry Epicier 2 L. Balan 3 Francis Vocanson 1 Y. Lefkir 1 J.-Y. Michalon 1
1 LHC - Laboratoire Hubert Curien [Saint Etienne]
2 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
3 IS2M - Institut de Science des Matériaux de Mulhouse
Abstract : This study focuses on changes in the oxidation state of silver and in the crystalline phase of TiO2 occurring during the photochromic transitions of amorphous nanocomposite mesoporous Ag:TiO2 films exposed to ultraviolet and visible laser light. The chemical and phase transformations have been investigated by ultraviolet–visible spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, and high-resolution transmission electron microscopy. The results bring to the fore the presence of both silver nanoparticles in face-centered cubic and hexagonal crystalline phases during the photochromic transitions and a large amount of oxidized silver nanoparticles after visible light exposure, along with nucleation of some TiO2 crystals despite the very low intensity used.
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Journal articles
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https://hal-ujm.archives-ouvertes.fr/ujm-01076550
Contributor : Nicolas Crespo-Monteiro <>
Submitted on : Wednesday, October 22, 2014 - 2:39:26 PM
Last modification on : Saturday, October 27, 2018 - 1:23:28 AM

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UNIV-ST-ETIENNE | INSA-LYON | LAHC | INC-CNRS | UNIV-LYON1 | MATEIS | SITE-ALSACE | IOGS | PARISTECH | INSA-GROUPE

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N. Crespo-Monteiro, N. Destouches, Thierry Epicier, L. Balan, Francis Vocanson, et al.. Changes in the Chemical and Structural Properties of Nanocomposite Ag:TiO2 Films during Photochromic Transitions. Journal of Physical Chemistry C, American Chemical Society, 2014, pp.24055-24061. ⟨10.1021/jp505702g⟩. ⟨ujm-01076550⟩

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