Journal of Materials Science

, Volume 34, Issue 21, pp 5273–5280

Lanthanide oxide-doped titanium dioxide: Effective photocatalysts for the degradation of organic pollutants

Authors

  • K. T. Ranjit
    • Institute of Chemistry, and Farkas Center for Light-Induced ProcessesThe Hebrew University of Jerusalem
  • H. Cohen
    • Chemical Services UnitWeizmann Institute of Science
    • Institute of Chemistry, and Farkas Center for Light-Induced ProcessesThe Hebrew University of Jerusalem
  • S. Bossmann
    • Engler-Bunte-Institut, Richard-WillstätterLehrstuhl für Umweltmesstechnik der Universität Karlsruhe (TH)
  • A. M. Braun
    • Engler-Bunte-Institut, Richard-WillstätterLehrstuhl für Umweltmesstechnik der Universität Karlsruhe (TH)
Article

DOI: 10.1023/A:1004780401030

Cite this article as:
Ranjit, K.T., Cohen, H., Willner, I. et al. Journal of Materials Science (1999) 34: 5273. doi:10.1023/A:1004780401030

Abstract

A series of lanthanide oxide-doped titanium dioxide photocatalysts Ln2O3/TiO2 (Ln3+ = Eu3+, Pr3+, Yb3+) were prepared. The photocatalysts reveal a substantially enhanced activity for the degradation of organic pollutants, as compared to undoped TiO2. The photodegradation processes of p-nitrobenzoic acid, (1), p-chlorophenoxyacetic acid, (2), aniline, (3), salicylic acid, (4), and trans-cinnamic acid, (5), with the different photocatalysts was examined. The photodegradation of (1)–(5) is significantly faster with Ln2O3/TiO2 photocatalysts and leads to complete mineralization of the organic compounds. The high activity of the Ln2O3/TiO2 photocatalysts is attributed to the enhanced association of the functionalized organic pollutants to lanthanide-ion surface sites.

Copyright information

© Kluwer Academic Publishers 1999