In situ ATR-FTIR study of H2O and D2O adsorption on TiO2 under UV irradiation

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Belhadj, Hamza; Hakki, Amer; Robertson, Peter K. J.; Bahnemann, Detlef W.: In situ ATR-FTIR study of H2O and D2O adsorption on TiO2 under UV irradiation. In: Physical Chemistry Chemical Physics 17 (2015), Nr. 35, S. 22940-22946. DOI: http://dx.doi.org/10.1039/c5cp03947a

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Abstract: 
The adsorption of water and deuterium oxide on TiO2 surfaces was investigated in the dark as well as under UV(A) irradiation using in situ ATR-FTIR spectroscopy under oxygen and oxygen free conditions. Adsorption of H2O–D2O mixtures revealed an isotopic exchange reaction occurring onto the surface of TiO2 in the dark. Under UV(A) irradiation, the amount of both OH and OD groups was found to be increased by the presence of molecular oxygen. Furthermore, the photocatalytic formation of hydroperoxide under oxygenated condition has been recorded utilizing Attenuated Total Reflection Fourier Transformed Infrared (ATR-FTIR) spectroscopy which appeared as new band at 3483 cm−1. Different possible mechanisms are discussed in terms of the source of hydroxyl groups formed and/or hydration water on the TiO2 surface for the photocatalytic reaction and photoinduced hydrophilicity.
License of this version: CC BY-NC 3.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2015-08-06
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 128 66.32%
2 image of flag of United States United States 16 8.29%
3 image of flag of Poland Poland 8 4.15%
4 image of flag of Japan Japan 8 4.15%
5 image of flag of China China 6 3.11%
6 image of flag of India India 5 2.59%
7 image of flag of Czech Republic Czech Republic 4 2.07%
8 image of flag of No geo information available No geo information available 2 1.04%
9 image of flag of Russian Federation Russian Federation 2 1.04%
10 image of flag of United Kingdom United Kingdom 1 0.52%
    other countries 13 6.74%

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