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Catalysis Letters

, Volume 24, Issue 3–4, pp 303–315 | Cite as

Surface properties of iron-titania photocatalysts employed for 4-nitrophenol photodegradation in aqueous TiO2 dispersion

  • L. Palmisano
  • M. Schiavello
  • A. Sclafani
  • C. Martin
  • I. Martin
  • V. Rives
Article

Abstract

Iron(III) doped specimens (0.01–5% atomic Fe ∶ Ti) have been prepared by impregnating polycrystalline “home prepared” TiO2 (mainly anatase) and have been studied for photocatalytic degradation of 4-nitrophenol in aqueous dispersions. Some structural and surface properties have been studied by X-ray diffraction, specific surface area and porosity measurements and FTIR monitoring of pyridine, ammonia and methanoic acid adsorption for surface acidity and basicity. Their surface properties were compared with a corresponding series of photocatalysts prepared by a coprecipitation method. Adsorption of pyridine and ammonia indicates the presence of surface acid Lewis sites, a low concentration of surface Brønsted sites being present only in the samples prepared by impregnation. The photocatalytic experiments indicated that the presence of iron ions does not influence or is detrimental for the occurrence of the 4-nitrophenol photodegradation.

Keywords

4-nitrophenol photodegradation iron-titania FTIR study Brønsted and Lewis surface acid sites 

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • L. Palmisano
    • 1
  • M. Schiavello
    • 1
  • A. Sclafani
    • 1
  • C. Martin
    • 2
  • I. Martin
    • 2
  • V. Rives
    • 2
  1. 1.Dipartimento di Ingegneria Chimica dei Processi e dei MaterialiUniversità di PalermoPalermoItaly
  2. 2.Departamento de Química InorgánicaUniversidad de Salamanca, Facultad de FarmaciaSalamancaSpain

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