The degradation results show that only when Ag on the surface of TiO2 film is composed of separating Ag particles, can it improve the photocatalytic degradation performance of TiO2 film.

• 结果表明,Ag在TiO2薄膜表面必须以聚集态纳米级Ag颗粒形式存在,才能起到提高TiO2薄膜光催化能力的作用。