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

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Abstract

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.

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Authors and Affiliations

  1. Dipartimento di Ingegneria dell’Innovazione, Università di Lecce, Via Arnesano, 73100, Lecce, Italy

    Giuseppe Mele, Roberta del Sole & Giuseppe Vasapollo

  2. Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Università di Palermo, Viale delle Scienze, 90128, Palermo, Italy

    Elisa García-López & Leonardo Palmisano

  3. Department of Chemistry, Northwest University, 710069, Xian, PR China

    Li Jun

  4. Institute of Chemistry, University of Opole, ul. Oleska 48, 45-095, Opole, Poland

    Rudolf Słota & Gabriela Dyrda

Authors
  1. Giuseppe Mele
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  2. Roberta del Sole
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  3. Giuseppe Vasapollo
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  4. Elisa García-López
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  5. Leonardo Palmisano
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  6. Li Jun
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  7. Rudolf Słota
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  8. Gabriela Dyrda
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Correspondence to Giuseppe Mele.

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Mele, G., del Sole, R., Vasapollo, G. et al. TiO2-based photocatalysts impregnated with metallo-porphyrins employed for degradation of 4-nitrophenol in aqueous solutions: role of metal and macrocycle. Res. Chem. Intermed. 33, 433–448 (2007). https://doi.org/10.1163/156856707779238649

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  • DOI: https://doi.org/10.1163/156856707779238649

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