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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Article dans une revue
Journal of Physical Chemistry C, American Chemical Society, 2014, pp.24055-24061. 〈10.1021/jp505702g〉
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https://hal-ujm.archives-ouvertes.fr/ujm-01076550
Contributeur : Nicolas Crespo-Monteiro <>
Soumis le : mercredi 22 octobre 2014 - 14:39:26
Dernière modification le : samedi 27 octobre 2018 - 01:23:28

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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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