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

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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The Journal of Physical Chemistry C, ACS American Chemical Society - Publications, 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 : mercredi 4 avril 2018 - 12:21:43

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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. The Journal of Physical Chemistry C, ACS American Chemical Society - Publications, 2014, pp.24055-24061. 〈10.1021/jp505702g〉. 〈ujm-01076550〉

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