In this work, we prepared Ag–TiO2 thin films using sol–gel
method, and AgNO3 was added during the process of preparing
TiO2 sol to avoid using excess solvent. Different amount of silverdoped
(molar ratio from 1 to 10%) TiO2 thin films were deposited
on glass slides by spin coating at room temperature. Because the
antibacterial ability of silver ions has been reported in previous
work of our group [16,17], only the antibacterial ability of Ag–TiO2
films under UV light irradiation was discussed using Escherichia
coliform removal. We also focused on the influences of different silver
concentration on the hydrophilicity of TiO2 films using contact
angle.