In this study; to increase the antibacterial properties, a series of Ag@TiO 2 using as core-shell structure that this composite was obtained via chemical deposition by used phenol, silver nitrate and water. The magnetic nanoparticles was prepared via co-precipitation method of Fe +3 and Fe +2 to controlled releasing of Ag@TiO 2 compound. This core coated by a layer of TEOS-APTESwas made sol-gel method and the overall composite was made of previous composite deposition on this compound. Nanocomposite characterized by different method that transmission electron microscope (TEM), Field EmissionScanning Electron Microscope (FE-SEM), Dynamic light scattering (DLS), X-ray Diffraction (XRD), Fourier TransformInfrared Spectroscopy (FT-IR), to showed morphology, size and structure of samples and in the following, magnetic properties of samples indicated via Vibrating sample magnetometer (VSM) andDiffusion disk test was used antibacterial activity of samples. The results showed, Ag nanoparticles were dispered on TiO 2 surface and photocatalytic activity of TiO 2 increased of coating with Ag and catalytic efficiency of Ag@TiO 2 core-shell structure is higher than TiO 2 nanoparticle and Magnetic core field was provided impact lasting and low releasing of silver in aqueous solution. Finally, Fe 3 O 4 /TEOS-APTES/Ag@TiO 2 indicated excellent antibacterial properties than Ag and Ag@TiO 2 .
