以化学还原法制备的不同尺寸的胶体Ag纳米粒子为前体,采用浸渍法合成了Ag/TiO2 光催化剂;利用UV-Vis、XRD、TEM等技术对银纳米粒子和Ag/TiO2催化剂样品分别进行了表征.以亚甲基蓝为光解目标污染物,研究了不同尺寸的银纳米粒子浸渍所形成的Ag/TiO2催化剂样品的光催化性能.结果表明,银纳米粒子的负载不会改变TiO2的晶体结构,但其尺寸对催化剂的光催化活性影响极大;此外,银负载量也是影响Ag/TiO2光催化剂活性的重要因素.在负载的最佳Ag粒子尺寸下, 0.5%Ag/TiO2催化剂的光催化活性最高.
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