Journal of Materials Science

, Volume 34, Issue 21, pp 5273–5280 | Cite as

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

  • K. T. Ranjit
  • H. Cohen
  • I. Willner
  • S. Bossmann
  • A. M. Braun
Article

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.

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • K. T. Ranjit
    • 1
  • H. Cohen
    • 2
  • I. Willner
    • 3
  • S. Bossmann
    • 4
  • A. M. Braun
    • 4
  1. 1.Institute of Chemistry, and Farkas Center for Light-Induced ProcessesThe Hebrew University of JerusalemJerusalemIsrael
  2. 2.Chemical Services UnitWeizmann Institute of ScienceRehovotIsrael
  3. 3.Institute of Chemistry, and Farkas Center for Light-Induced ProcessesThe Hebrew University of JerusalemJerusalemIsrael
  4. 4.Engler-Bunte-Institut, Richard-WillstätterLehrstuhl für Umweltmesstechnik der Universität Karlsruhe (TH)KarlsruheGermany

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