Résumé
Phthalocyanine derivatives are the photosensitizers of second generation If the photosensitizers be in contact with the diatomic oxygen and the light of higher wavelength (preferably 670 nm), they are able to generate reactive oxygen species The reactive oxygen species act as cytostatics, bacteriostatisc and virocides Besides, the reactive oxygen species are also able to decompose harmful pollutants
Similar characteristics perform nanoparticles of titanium oxide in anatas form. If the titanium oxide be in contact with the diatomic oxygen and ultraviolet light, it generates highly reactive oxygen radicals, belonging to the group of reactive oxygen species
The lecture describes a method of anatas form titanium oxide nanoparticles modification with phthalocyanine derivatives The result of such modification is ability of modified titanium oxide to produce highly reactive oxygen radicals by irradiation with day light, instead of ultraviolet one.
Titanium oxide nanoparticles of anatas form, modified with phthalocyanines, are able to decompose successfully both 4-chlorophenole and the model pollutant Orange II in water medium. Process of model pollutant Orange II decomposition is also successfully carried out when the above mentioned titanium oxide, treated with suitable phthalocyanine derivatives, has been incorporated into the silicate paint, which is subsequently irradiated with the day light