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Nanosize TiO_ 2,Y_ 2 O _ 3/TiO_ 2 particles were prepared by the sol-gel process. The structur e was characterized by means of XRD,TEM. The photoelectric properties of the nan oparticles were studied by PL. The thickness and the surface of the carboxymethy l cellulose film was measured by SEM. Based on a model reaction, the photocataly tic degradation of methylene blue with positive charge was investigated in TiO_ 2, Y_2O_3/TiO_ 2 nanopowder composite films irradiated by UV lamp. The results revealed that the degradation process belonged to the first-order k inetic reaction.
The structur e was characterized by means of XRD, TEM. The photoelectric properties of the nan oparticles were studied by PL. The thickness and the surface of the carboxymethy cellulose film was measured by SEM. Based on a model reaction, the photocatalytic degradation of methylene blue with positive charge was investigated in TiO 2, Y 2 O 3 / TiO 2 nanopowder composite films irradiated by UV lamp. The results revealed that the degradation process belonged to the first-order k inetic reaction.