| Résumé : |
Nanoscaled materials characteristics differ from bulk materials and from micro sized powders. The higher surface area affect their chemical and physical properties, allowing the design of new materials with improved optical, thermal, mechanical, chemical, electrical performances. In the last years, the progress in the synthesis of nano-scaled materials promoted the use of nano-crystals in many different fields, for instance in optoelectronics, biomedical, energy conversion and photocatalysis. In particular, the production of photocatalytic coatings is a field of great interest, mainly because of the challenging possibilities in the environmental field given by the photodegradation of pollutant substances. On the basis of the former studies in the field of nanotechnology, dealing with metallic coatings with ceramic nano-reinforcements, this work has been conducted, in order to characterize and test the photocatalytic activity of several titanium dioxide nanopowders, compared to a common microsized powder. In this paper, the results of the characterization and the photocatalytic behaviour of the powders, and the dispersion of the powders in coatings matrixes are discussed. |
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Characterization and testing of photoreactive pigments in DOUBLE LIAISON, N° 554 (12/2006)
