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Catalysts 2017, 7(10), 303; doi:10.3390/catal7100303

Reactivity of Trapped and Accumulated Electrons in Titanium Dioxide Photocatalysis

Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe 650-8530, Japan
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Received: 20 September 2017 / Revised: 5 October 2017 / Accepted: 8 October 2017 / Published: 13 October 2017
(This article belongs to the Special Issue Titanium Dioxide Photocatalysis)
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Abstract

Electrons, photogenerated in conduction bands (CB) and trapped in electron trap defects (Tids) in titanium dioxide (TiO2), play crucial roles in characteristic reductive reactions. This review summarizes the recent progress in the research on electron transfer in photo-excited TiO2. Particularly, the reactivity of electrons accumulated in CB and trapped at Tids on TiO2 is highlighted in the reduction of molecular oxygen and molecular nitrogen, and the hydrogenation and dehalogenation of organic substrates. Finally, the prospects for developing highly active TiO2 photocatalysts are discussed. View Full-Text
Keywords: titanium dioxide; photocatalysis; surface defects; bulk defects; trapped electrons; accumulated electrons titanium dioxide; photocatalysis; surface defects; bulk defects; trapped electrons; accumulated electrons
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Kohtani, S.; Kawashima, A.; Miyabe, H. Reactivity of Trapped and Accumulated Electrons in Titanium Dioxide Photocatalysis. Catalysts 2017, 7, 303.

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