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Electronic band structure studies of anatase TiO 2 thin films modified with Ag, Au, or ZrO 2 nanophases

2016; Wiley; Volume: 253; Issue: 9 Linguagem: Inglês

10.1002/pssb.201600042

1521-3951

Anastasiia Nemashkalo, T. O. Busko, Raul Peters, О. P. Dmytrenko, М. P. Kulish, N. V. Vityuk, В. Н. Ткач, Yuri M. Strzhemechny,

Catalytic Processes in Materials Science

physica status solidi (b)Volume 253, Issue 9 p. 1754-1764 Original Paper Electronic band structure studies of anatase TiO2 thin films modified with Ag, Au, or ZrO2 nanophases Anastasiia B. Nemashkalo, Corresponding Author Anastasiia B. Nemashkalo an27@rice.edu Department of Physics and Astronomy, Texas Christian University, Box 298840, Fort Worth, TX, 76129 USACurrent address: Department of Biosciences, Rice University, Houston, Texas, USA Corresponding author: e-mail an27@rice.edu, Phone: 713-348-2445, Fax: 817-257-7742Search for more papers by this authorTetiana O. Busko, Tetiana O. Busko Kyiv National Taras Shevchenko University, 64 Volodymyrska Str., 01601 Kyiv, UkraineSearch for more papers by this authorRaul M. Peters, Raul M. Peters Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorOksana P. Dmytrenko, Oksana P. Dmytrenko Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorMykola P. Kulish, Mykola P. Kulish Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorNadia V. Vityuk, Nadia V. Vityuk O. Chuiko Institute of Surface Chemistry of NASU, 17 Gen. Naumov Str., 03164 Kyiv, UkraineSearch for more papers by this authorVasyl M. Tkach, Vasyl M. Tkach V. Bakul Institute for Super Hard Materials, 2 Avtozavodska Str., 04074 Kyiv, UkraineSearch for more papers by this authorYuri M. Strzhemechny, Yuri M. Strzhemechny Department of Physics and Astronomy, Texas Christian University, Box 298840, Fort Worth, TX, 76129 USASearch for more papers by this author Anastasiia B. Nemashkalo, Corresponding Author Anastasiia B. Nemashkalo an27@rice.edu Department of Physics and Astronomy, Texas Christian University, Box 298840, Fort Worth, TX, 76129 USACurrent address: Department of Biosciences, Rice University, Houston, Texas, USA Corresponding author: e-mail an27@rice.edu, Phone: 713-348-2445, Fax: 817-257-7742Search for more papers by this authorTetiana O. Busko, Tetiana O. Busko Kyiv National Taras Shevchenko University, 64 Volodymyrska Str., 01601 Kyiv, UkraineSearch for more papers by this authorRaul M. Peters, Raul M. Peters Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorOksana P. Dmytrenko, Oksana P. Dmytrenko Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorMykola P. Kulish, Mykola P. Kulish Paine College, 1235 Fifteenth Street, Augusta, GA, 30901 USASearch for more papers by this authorNadia V. Vityuk, Nadia V. Vityuk O. Chuiko Institute of Surface Chemistry of NASU, 17 Gen. Naumov Str., 03164 Kyiv, UkraineSearch for more papers by this authorVasyl M. Tkach, Vasyl M. Tkach V. Bakul Institute for Super Hard Materials, 2 Avtozavodska Str., 04074 Kyiv, UkraineSearch for more papers by this authorYuri M. Strzhemechny, Yuri M. Strzhemechny Department of Physics and Astronomy, Texas Christian University, Box 298840, Fort Worth, TX, 76129 USASearch for more papers by this author First published: 02 May 2016 https://doi.org/10.1002/pssb.201600042Citations: 4 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract In this work we studied electronic structure of sol–gel grown anatase thin films modified with gold, silver, and zirconia. Surface photovoltage spectroscopy and photoluminescence spectroscopy were employed to obtain band diagrams of TiO2, TiO2/Au, TiO2/Ag, and TiO2/ZrO2 thin films. Our results showed presence of energy levels at ∼2.2, ∼2.3–2.4, and ∼2.7–2.9 eV above the top of the valence band, common in all the films. Most of these states are related to oxygen deficiency. Addition of Ag results in noticeable changes in the electronic structure and, in particular, appearance of an energy level at ∼1.8 eV, apparently associated with Ag doping. Addition of Au did not result in significant changes in electronic states and no Au-related gap states were detected. Zirconia addition resulted in an increased number of the native defect-related states whereas no Zr-related states were observed. These results are discussed in relation to the photocatalytic activity of the studied materials and the role of defect states. Citing Literature Volume253, Issue9September 2016Pages 1754-1764 RelatedInformation