COMPOSITES OF ZINC PHTHALOCYANINE AND TITANIUM OXIDE, FOR USE IN PHOTOCATALYTICAL PROCESSES, AND METHOD FOR THEIR OBTENTION

摘要

The composites object of this invention are catalysts for photochemical processes which aims the environmental decontamination, being their characteristic a very superior photocatalytical efficiency when compared with the observed for pure titanium oxides. The composites, object of the invention, are a combination of TiO2 with a photosensitiser dye, capable to mediate photocatalytical processes using the incident radiation in wavelength ranges incapable to promote the excitation of the pure photocatalyst. This occurs due to the electronic excitation of the dye in these regions of the electromagnetic spectrum. The excited photosensitiser dye promotes electron transfer to the conduction band of the catalyst, potencializing the photocatalytical action. With this, the wastewater treatment with the use of solar radiation becomes interesting, due to the captation of useful photons in a large range of the electromagnetic spectrum and energy conversion from these composites.