TiO2 hollow spheres were prepared by hydrothermal precipitation method using titanium sulfate and carbamide as the original raw materials and carbon spheres as the templates, and Ag-doped TiO2 hollow spheres were synthesized by adding KBH4 to reduce AgNO3 using PVP as a dispersant. The obtained samples were characterized by X-ray diffractometer, scan electron microscopy, transmission electron microscopy, energy dispersive spectrometer and infrared spectrometer. Experimental results showed that P25 and TiO2 hollow spheres had no antibacterial effect in the inactivation of Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Candida albicans (C. albicans) under the natural light conditions, when inhibition zone method was tested for their antibacterial properties. But TiO2 hollow spheres doping 9.4 mol % of the amount of Ag had excellent antibacterial properties against the above three strains at room temperature. So they can be used for antibacterial plastics, antibacterial food packaging and antibacterial textiles and other fields.
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