Photochemical activity of TiO2 nanotubes

A. Pfuch; F. Güell; T. Toelke; S. K. Das; H. Messaoudi; E. McGlynn; W. Seeber; C. Fábrega; T. Andreu; J. R. Morante; R. Grunwald

doi:10.1117/12.2000554

18 March 2013 Photochemical activity of TiO₂ nanotubes

A. Pfuch, F. Güell, T. Toelke, S. K. Das, H. Messaoudi, E. McGlynn, W. Seeber, C. Fábrega, T. Andreu, J. R. Morante, R. Grunwald

Author Affiliations +

Proceedings Volume 8626, Oxide-based Materials and Devices IV; 86260S (2013) https://doi.org/10.1117/12.2000554
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

TiO₂ is well known as a low-cost, highly active photocatalyst showing good environmental compatibility. Recently it was found that TiO₂ nanotubes promise to enable for high photocatalytic activity (PCA). In our experiments, we studied the PCA and spectroscopic properties of TiO₂ nanotube arrays formed by the anodization of Ti. The PCA efficiency related to the decomposition of methylene-blue was measured. To obtain reliable data, the results were calibrated by comparing with standard materials like Pilkington Activ™ which is a commercially available self cleaning glass. The studies included a search strategy for finding optimum conditions for the nanotube formation and the investigation of the relationship between PCA and annealing temperature. TiO₂ nanotubes of different shapes and sizes were prepared by an anodization of Ti foil in different electrolytes, at variable applied voltages and concentrations. The photo-dissociation of methylene-blue was detected spectroscopically. For the optimized material, an enhancement factor of 2 in comparison to the standard reference material was found. Furthermore, femtosecond-laser induced photoluminescence and nonlinear absorption of the material were investigated. Possibilities for further enhancements of the PCA are discussed.

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A. Pfuch, F. Güell, T. Toelke, S. K. Das, H. Messaoudi, E. McGlynn, W. Seeber, C. Fábrega, T. Andreu, J. R. Morante, and R. Grunwald "Photochemical activity of TiO₂ nanotubes", Proc. SPIE 8626, Oxide-based Materials and Devices IV, 86260S (18 March 2013); https://doi.org/10.1117/12.2000554

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