Modified Titania in the Photo-Assisted Oxidation of Chloroform


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Degussa P-25 TiO2 powder was used as a catalyst in the photocatalytic oxidation of organics. With the objective of promoting a more effective electron-hole separation upon irradiation, the catalyst was modified with small amounts of platinum. Characterisation of the powders was done by X-Ray diffraction and SEM. Chloroform was used as a model molecule and its degradation followed using selective electrodes, with excellent results for the modified titania. Langmuir-Hinselwood kinetic was used to describe the heterogeneous oxidation of chloroform on TiO2, for low solute concentrations.



Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho




R. Gouveia et al., "Modified Titania in the Photo-Assisted Oxidation of Chloroform", Materials Science Forum, Vols. 514-516, pp. 1385-1390, 2006

Online since:

May 2006




[1] D. Robert and S. Malato: The Science of the Total Environment Vol. 291 (2002), p.85.

[2] D.D. Dionysiou, M.T. Suidan, E. Bekou, I. Baudin, and J.M. Laine: J. Photochem. Photobiol. A: Chem. Vol. 26 (2000), p.153.

[3] M.I. Litter: Appl. Cat. B: Env. Vol. 23 (1999), p.89.

[4] A. Linsebigler, G. Lu and J. Yates: Chem. Rev. Vol. 95 (1995), p.735.

[5] T. Zhang, T. Oyama, A. Aoshima, H. Hidaka, J. Zhao and N. Serpone: J. Photochem. Photobiol. A: Chem Vol. 140 (2001), p.163. 0 5 10 15 20 25 30 35 0 2 4 6 8 10 12 14 16 Irradiation time / min.

[6] C. Hun, T. Yuchau, L. Lanyu, H. Zhengping, W. Yishong and T. Hongxiao: J. Chem. Technol. Biotechnol. Vol. 79 (2004), p.247.

[7] C. Kormann: Envir. Sci. Technol. Vol. 25 (1991), p.494.

[8] U. Siemon, D. Bahnemann, J.J. Testa, D. Rodríguez, M. Litter and N. Bruno: J. Photochem. Photobiol. A: Chem. Vol. 148 (2002), p.247.

[9] M. S. Vohra and K. Tanaka: Wat. Res. Vol. 36 (2002), p.59.

[10] S. Sakthivel, M.V. Shankar, M. Palanichamy, B. Arabindoo, D.W. Banhemann, and V. Murugesan: Wat. Res. Vol. 38 (2004), p.3001.

[11] D. Vione, C. Minero, V. Maurino, M.E. Carlotti, T. Picatonotto, E. Pelizetti: Appl. Cat. B: Environm. Vol. 58 (2005), p.81.

[12] I. Baudin, J-M. Laîne, App. Cat. B: Envir. Vol. 24 (2000), p.139.

[13] C. Galindo, P. Jacques, A. Kalt, J. Photochem. Photobiol. A: Chem. Vol. 130 (2000), p.35.

[14] I. Arslan, I. A. Balcioglu, D. W. Bahnemann, App. Cat. B: Envir. Vol. 26 (2000), p.193.

[15] J. -M. Hermann, H. Tahiri, Y. Ait-Ichou, G. Lassaletta, A. R. González-Elipe, A. Fernández, App. Cat. B: Env. Vol. 13 (1997), p.219.

[16] F. Zhang, J. Zhao, T. Shen, H. Hidaka, E. Pelizetti, N. Serpone, App. Cat. B: Envir. Vol. 15 (1998), p.147.