Abstract
Nitrogen-doped TiO2, a novel photocatalyst active in the decomposition of organic pollutants using visible light, contains several different types of paramagnetic centers. These are molecular species, such as NO and NO2 radicals and other species, deeply interacting with the TiO2 structure. All or part of these species is related to specific properties of the solid. Electron paramagnetic resonance has been employed to characterize the N-containing paramagnetic species present in N-doped anatase TiO2 powders obtained via sol-gel synthesis. In the present work attention is focused on molecular species generated during the synthesis process and segregated in cavities of the TiO2 structure.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. Asahi, T. Morikawa, T. Ohwaki, K. Aoki and Y. Taga, Science 293, 269 (2001).
T. Lindgren, J. M. Mwabora, E. Avendano, J. Jonsson, A. Hoel, C. G. Granqvist and S. E. Lindquist, J. Phys. Chem. B 107, 5709 (2003).
H. Irie, Y. Watanabe and K. Hashimoto, J. Phys. Chem. B 107, 5483 (2003).
C. Di Valentin, G. Pacchioni and A. Selloni, Phys. Rev. B 70 (2004).
H. Irie, S. Washizuka, N. Yoshino and K. Hashimoto, Chem. Commun., 1298 (2003).
S. Sakthivel and H. Kisch, ChemPhysChem 4, 487 (2003).
A. Adamski, T. Spalek and Z. Sojka, Res. Chem. Intermed. 29, 793 (2003).
S. Livraghi, A. Votta, M. C. Paganini and E. Giamello, Chem. Commun., 498 (2005).
Y. B. Taarit, C. Naccache and B. Imelik, J. Chem. Phys., 70, 728 (1973).
J. H. Lunsford, J. Phys. Chem. 72, 2141 (1968).
J. H. Lunsford, J. Chem. Phys. 46, 4347 (1967).
D. Biglino, H. T. Li, R. Erickson, A. Lund, H. Yahiro and M. Shiotani, Phys. Chem. Chem. Phys. 1, 2887 (1999).
J. W. Whittaker, J. Chem. Educ. 68, 421 (1991).
P. W. Atkins, N. Keen and M. C. R. Symons, J. Chem. Soc. 28, 2873 (1962).
C. K. Jen, S. N. Foner, E. L. Cochran and V. A. Bowers, Phys. Rev. 112, 11699 (1958).
H. Zeld and R. Livingston, J. Chem. Phys. 35, 563 (1961).
P. H. Kasai and R. J. B. Bishop, J. Am. Chem. Soc. 94, 5560 (1972).
C. Di Valentin, G. Pacchioni, A. Selloni, S. Livraghi and E. Giamello, J. Phys. Chem. B 109, 11414 (2005).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Livraghi, S., Paganini, M.C., Chiesa, M. et al. Trapped molecular species in N-doped TiO2 . Res Chem Intermed 33, 739–747 (2007). https://doi.org/10.1163/156856707782169462
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1163/156856707782169462