Quantitative Measurements of Photocatalytic CO-Oxidation as a Function of Light Intensity and Wavelength over TiO2 Nanotube Thin Films in μ-Reactors

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• 作者：Peter C. K. Vesborg ; Su-il In ; Jakob L. Olsen ; Toke R. Henriksen ; Billie L. Abrams ; Yidong Hou ; Alan Kleiman-Shwarsctein ; Ole Hansen ; Ib Chorkendorff
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：July 1, 2010
• 年：2010
• 卷：114
• 期：25
• 页码：11162-11168
• 全文大小：309K
• 年卷期：v.114,no.25(July 1, 2010)
• ISSN：1932-7455

文摘

Gas-phase photooxidation of CO over TiO₂ catalysts (P25 and TiO₂ nanotubes) in μ-reactors with quantitative product detection was used to study turnover as a function of illumination intensity over 4 orders of magnitude. Turnover was found to be of order 0.84 in illumination intensity. A CO photooxidation action spectrum was also recorded for TiO₂ nanotubes. The action spectrum was used to calculate both the incident photon to product efficiency (IPPE) and the absorbed photon to product efficiency (APPE). The wavelength dependence of the IPPE was found to follow the absorption spectrum while the APPE was found to have a peak around 345 nm with a value of about 0.8%.