Analysis of visible-light-active Sn(II)–TiO2 photocatalysts

Venkata Bharat Ram Boppana; Feng Jiao; Dave Newby; Jude Laverock; Kevin E. Smith; Jean Claude Jumas; Greg Hutchings; Raul F. Lobo

doi:10.1039/C3CP44635B

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Analysis of visible-light-active Sn(ii)–TiO₂ photocatalysts

Venkata Bharat Ram Boppana,^a Feng Jiao,^a Dave Newby, Jr.,^b Jude Laverock,^b Kevin E. Smith,^b Jean Claude Jumas,^c Greg Hutchings^a and Raul F. Lobo*^a

Author affiliations

* Corresponding authors

^a Center for Catalytic Science & Technology, Department of Chemical Engineering, University of Delaware, 150 Academy Street, Newark, DE, 19716 USA
E-mail: lobo@udel.edu
Fax: +1-302-831-1048
Tel: +1-302-831-3679

^b Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, USA

^c Charles Gerhardt Institute for Molecular Chemistry and Materials, 34095 Montpellier CEDEX 5, France

Abstract

The influence of Sn(II) species on TiO₂ is investigated. The absorption spectra of these materials are red-shifted by 115 nm to the visible region of the solar spectrum compared with P25 TiO₂. This prominent red-shift is attributed to the interaction of Sn(II) 5s orbitals with the TiO₂ decreasing the band gap of TiO₂ by raising its valence band. The tin oxidation state and the materials electronic structure are evaluated using Mössbauer spectroscopy and valence band X-ray photoelectron spectroscopy respectively. These materials are active for sacrificial photo-generation of hydrogen in visible light.

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Article information

DOI: https://doi.org/10.1039/C3CP44635B
Article type: Communication
Submitted: 21 Dec 2012
Accepted: 12 Mar 2013
First published: 13 Mar 2013

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Phys. Chem. Chem. Phys., 2013,15, 6185-6189

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Analysis of visible-light-active Sn(II)–TiO₂ photocatalysts

V. B. R. Boppana, F. Jiao, D. Newby, J. Laverock, K. E. Smith, J. C. Jumas, G. Hutchings and R. F. Lobo, Phys. Chem. Chem. Phys., 2013, 15, 6185 DOI: 10.1039/C3CP44635B

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