In order to enlarge the absorbed intensity of nano-TiO2 in visible light, Ag/TiO2 nanoparticles were prepared mainly from industrial H2TiO3 and AgNO3 by a simple method. It was characterized by X-ray powder diffraction(XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and UV-vis. XRD patterns showed that TiO2 existed as anatase and silver existed as elemental form in nano composite particles. XPS results showed that the binding energies of silver were 367.476 eV (3d3/2) and 373.453 eV (3d5/2), which were lower than those of simple silver (368.4 eV and 374.4 eV), since the preparation temperature of Ag/TiO2 was higher than simple silver and led to Ag cluster growth. SEM and TEM results showed that the particle size of nano-composite particles was about 30 nm. Moreover, UV-vis refractive spectrums showed that its photocatalytic wavelength was apparently red shift, and the absorbed intensity of nano TiO2 in visible light was enlarged.
