Ag was deposited by H 2 reduction on the surface of TiO 2 nanoparticles. The results of SEM, XRD and UV-vis show that Ag distributes uniformly on the TiO_2 surface and the Einstein shift can be observed clearly in the UV-vis adsorption spectrum.

• 用H2气还原法制备了表面沉积Ag的纳米TiO2,通过对样品SEM、XRD、UV Vis漫反射光谱分析,结 果表明,金属Ag在TiO2表面呈细小而均匀的分布,UV Vis光谱上的吸收阈值显著红移。