Preparation, characterization and photocatalytic activity of metalloporphyrins-modified TiO2 composites

Preparation, characterization and photocatalytic activity of metalloporphyrins-modified TiO2... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Preparation, characterization and photocatalytic activity of metalloporphyrins-modified TiO2 composites

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Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media B.V.
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0701-z
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jul 8, 2012

References

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