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Characterization and Evaluation of the Efficiency of TiO2/Zinc Phthalocyanine Nanocomposites as Photocatalysts forWastewater Treatment Using Solar Irradiation

Machado, Antonio Eduardo da Hora and Franca, Marcela D. and Velani, Valdemir and Magnino, Gabriel A. and Velani, Hosana M.M. and Freitas, Flavio S. and Müller Jr., Paulo S. and Sattler, Christian and Schmücker, Martin (2008) Characterization and Evaluation of the Efficiency of TiO2/Zinc Phthalocyanine Nanocomposites as Photocatalysts forWastewater Treatment Using Solar Irradiation. International Journal of Photoenergy, 2008 (482373), pp. 1-12. Hindawi Publishing Corporation. DOI: 10.1155/2008/482373.

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Official URL: http://www.hindawi.com/getarticle.aspx?doi=10.1155/2008/482373

Abstract

This work reports the characterization of composites prepared by the association between zinc phthalocyanine (ZnPc) and titanium dioxide. These composites are better photocatalysts for wastewater decontamination ediated by solar radiation than pure TiO2, performance that remains even when reused. The UV-Vis diffuse reflectance absorption spectra show for these composites two intense absorption bands. The first covers the ultraviolet and part of the visible spectrum region until 460nm (2.7 eV), whereas the second, nonstructured, goes from 475nm until the near infrared with an absorption peak at 683nm attributed to the Q band of ZnPc. The production of additional e−/h+ pairs by these aggregates when photoexcited, their capability to act as charge carrier, the thickness and regularity of their distribution on the TiO2 surface seem to be important parameters for the performance observed for these composites.

Document Type:Article
Title:Characterization and Evaluation of the Efficiency of TiO2/Zinc Phthalocyanine Nanocomposites as Photocatalysts forWastewater Treatment Using Solar Irradiation
Authors:
AuthorsInstitution or Email of Authors
Machado, Antonio Eduardo da HoraUniversidade Federal de Uberlândia
Franca, Marcela D.Universidade Federal de Uberlândia
Velani, ValdemirNanobrax
Magnino, Gabriel A.Universidade Federal de Uberlândia
Velani, Hosana M.M.Nanobrax
Freitas, Flavio S.Universidade Federal de Uberlândia
Müller Jr., Paulo S.Nanobrax
Sattler, ChristianUNSPECIFIED
Schmücker, MartinUNSPECIFIED
Date:27 March 2008
Journal or Publication Title:International Journal of Photoenergy
Volume:2008
DOI:10.1155/2008/482373
Page Range:pp. 1-12
Publisher:Hindawi Publishing Corporation
Status:Published
Keywords:solar, phthalocyanine, water treatment,
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Stoffumwandlung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Institute of Materials Research > Structural and Functional Ceramics
Deposited By: Dr.rer.nat. Christian Sattler
Deposited On:30 May 2008
Last Modified:12 Dec 2013 20:31

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