Three new Cu(II), Zn(II), Co(II) 5,15-di (4-hydroxyphenyl)-10, 20-diphenyl-porphyrin (CuDHPP, ZnDHPP, CoDHPP) and the corresponding metalloporphyrins–TiO2 photocatalysts CuDHPP–TiO2, ZnDHPP–TiO2, CoDHPP–TiO2 were synthesized and characterized by SEM, XRD, FT-IR, and DRS. The results revealed that the metalloporphyrins impregnated onto the surface of TiO2 did not change the phase composition and particle sizes of TiO2 samples, but increased the photocatalytic efficiency. In addition, photoluminescence study showed that the three photocatalysts could successfully increase the separation efficiency of the photoinduced electron and hole. The photodegrading 4-NP experiments indicated that the three photocatalysts greatly enhanced the photocatalytic activity of bare TiO2, and the photocatalytic activity of CuDHPP–TiO2 was the highest. Moreover, the possible mechanism for the photodegradation of 4-NP was also proposed.
Research on Chemical Intermediates – Springer Journals
Published: Jul 8, 2012
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