Photostabilization of dye on anatase titania nanoparticles by polymer capping

Nanoparticles of titanium dioxide (TiO2) were prepared by the sol-gel metho d and characterized by XRD, TEM, FTIR and UV-Visible absorption spectroscop y for their structure, morphology and particle size. Organization, stabiliz ation of the nanoparticles of TiO2 from further growth, and partially inhib iting the photodegradation was achieved by capping with polymers. Photodegr adation of dye on TiO2 nanoparticles encapsulated in different polymers has been studied by diffused reflectance UV spectroscopy. The role of the poly mer on the photodegradation of TiO2 has been compared and explained. (C) 20 01 Elsevier Science Ltd. All rights reserved.