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Amidani L, Naldoni A, Malvestuto M, et al. Probing long-lived plasmonic-generated charges in TiO2 /Au by high-resolution X-ray absorption spectroscopy. Angew Chem Int Ed Engl. 2015;54(18):5413-6doi: 10.1002/anie.201412030.
Amidani, L., Naldoni, A., Malvestuto, M., Marelli, M., Glatzel, P., Dal Santo, V., & Boscherini, F. (2015). Probing long-lived plasmonic-generated charges in TiO2 /Au by high-resolution X-ray absorption spectroscopy. Angewandte Chemie (International ed. in English), 54(18), 5413-6. https://doi.org/10.1002/anie.201412030
Amidani, Lucia, et al. "Probing long-lived plasmonic-generated charges in TiO2 /Au by high-resolution X-ray absorption spectroscopy." Angewandte Chemie (International ed. in English) vol. 54,18 (2015): 5413-6. doi: https://doi.org/10.1002/anie.201412030
Amidani L, Naldoni A, Malvestuto M, Marelli M, Glatzel P, Dal Santo V, Boscherini F. Probing long-lived plasmonic-generated charges in TiO2 /Au by high-resolution X-ray absorption spectroscopy. Angew Chem Int Ed Engl. 2015 Apr 27;54(18):5413-6. doi: 10.1002/anie.201412030. Epub 2015 Mar 06. PMID: 25752827.
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Angew Chem Int Ed Engl. 2015 Apr 27;54(18):5413-6. doi: 10.1002/anie.201412030. Epub 2015 Mar 06.

Probing long-lived plasmonic-generated charges in TiO2 /Au by high-resolution X-ray absorption spectroscopy.

Angewandte Chemie (International ed. in English)

Lucia Amidani, Alberto Naldoni, Marco Malvestuto, Marcello Marelli, Pieter Glatzel, Vladimiro Dal Santo, Federico Boscherini

Affiliations

  1. Department of Physics and Astronomy, University of Bologna, Viale Berti-Pichat 6/2, 40127 Bologna (Italy); ESRF-The European Synchrotron, 71 Avenue des Martyres, Grenoble 38000 (France). [email protected].

PMID: 25752827 DOI: 10.1002/anie.201412030

Abstract

Exploiting plasmonic Au nanoparticles to sensitize TiO2 to visible light is a widely employed route to produce efficient photocatalysts. However, a description of the atomic and electronic structure of the semiconductor sites in which charges are injected is still not available. Such a description is of great importance in understanding the underlying physical mechanisms and to improve the design of catalysts with enhanced photoactivity. We investigated changes in the local electronic structure of Ti in pure and N-doped nanostructured TiO2 loaded with Au nanoparticles during continuous selective excitation of the Au localized surface plasmon resonance with X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). Spectral variations strongly support the presence of long-lived charges localized on Ti states at the semiconductor surface, giving rise to new laser-induced low-coordinated Ti sites.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: X-ray absorption spectroscopy; hot electrons; photocatalysis; plasmon resonance; titanium

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