Research on Chemical Intermediates

, Volume 33, Issue 3–5, pp 433–448 | Cite as

TiO2-based photocatalysts impregnated with metallo-porphyrins employed for degradation of 4-nitrophenol in aqueous solutions: role of metal and macrocycle

  • Giuseppe Mele
  • Roberta del Sole
  • Giuseppe Vasapollo
  • Elisa García-López
  • Leonardo Palmisano
  • Li Jun
  • Rudolf Słota
  • Gabriela Dyrda


Photodegradation of organic compounds in water solutions by means of economically advantageous and environment-friendly processes is a topic of growing interest. In recent years a great attention has been devoted to TiO2-based photocatalysts for the oxidative degradation of various organic pollutants. In this context, we have prepared new photo-catalytic polycrystalline TiO2 systems impregnated with sensitizers, i.e., copper, iron or manganese porphyrins, and investigated their photoactivity for 4-nitrophenol oxidation compared with that of bare TiO2. A significant improvement of the photoreactivity was observed in the case of TiO2 impregnated with copper porphyrin, while only a slight beneficial effect was observed in the case of iron porphyrin. In contrast, the presence of manganese porphyrin appeared to be detrimental.


Titanium dioxide porphyrins sensitizers photocatalysis photochemistry 


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Copyright information

© Springer 2007

Authors and Affiliations

  • Giuseppe Mele
    • 1
  • Roberta del Sole
    • 1
  • Giuseppe Vasapollo
    • 1
  • Elisa García-López
    • 2
  • Leonardo Palmisano
    • 2
  • Li Jun
    • 3
  • Rudolf Słota
    • 4
  • Gabriela Dyrda
    • 4
  1. 1.Dipartimento di Ingegneria dell’InnovazioneUniversità di LecceLecceItaly
  2. 2.Dipartimento di Ingegneria Chimica dei Processi e dei MaterialiUniversità di PalermoPalermoItaly
  3. 3.Department of ChemistryNorthwest UniversityXianPR China
  4. 4.Institute of ChemistryUniversity of OpoleOpolePoland

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