Preparation and properties of antibacterial TiO@C/Ag core-shell composite.

An environment-friendly hydrothermal method was used to prepare TiO@C core-shell composite using TiO as core and sucrose as carbon source. TiO@C served as a support for the immobilization of Ag by impregnation in silver nitrate aqueous solution. The chemical structures and morphologies of TiO@C and TiO@C/Ag composite were characterized by x-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, energy dispersive x-ray spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The antibacterial properties of the TiO@C/Ag core-shell composite against () and () were examined by the viable cell counting method. The results indicate that silver supported on the surface of TiO@C shows excellent antibacterial activity.