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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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| Authors: | Giuseppe Mele Roberta del Sole Giuseppe Vasapollo Elisa García-López Leonardo Palmisano Li Jun Rudolf Słota Gabriela Dyrda |
| Institution: | 1. Dipartimento di Ingegneria dell’Innovazione, Università di Lecce, Via Arnesano, 73100, Lecce, Italy 2. Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Università di Palermo, Viale delle Scienze, 90128, Palermo, Italy 3. Department of Chemistry, Northwest University, 710069, Xian, PR China 4. Institute of Chemistry, University of Opole, ul. Oleska 48, 45-095, Opole, Poland |
| 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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