А series of Ag/TiO 2 is prepared by the chemical deposition method using silver nitrate and suspension of TiO(OH) 2 following sonication and treatment up 600C. Silver nanoparticles are deposited on the surface and inside of TiO 2 nanoparticles depending on the Ag concentration. The Ag/TiO 2 composites are characterized by x-ray diffraction, transmission electron microscopy, scanning electron microscopy, Raman and photoluminescence spectroscopies. The optical activity of Ag/TiO 2 with significant attenuation of photoluminescence in the range of 480-600 nm, a shift of mode E g from 143 to 150 cm 1 and FWHM from 12 to 19 cm 1 are revealed due to decreasing of TiO 2 crystallites. The optical activity is increased after loading with Ag because metal particles offer electron traps to decrease the recombination of holes and electrons, especially, with Ag loading of 8 wt.%. The obtained results indicate lower toxicity of nanoparticles in the glycer-inewater suspension; regardless of the introduction of silver molecules in amount of 4 or 8 wt.%, their CC 50 values are of 50 g/mL and 3.9-58.5 g/mL for the MDBK and MDCK cells, respectively. Instead, TiO 2 nanoparticles in C 2 H 5 OH1.3-propanediol with the introduction of silver mole-