研究了用胶体Ag纳米粒子负载法合成的Ag/TiO2 光催化剂对可见光催化降解目标污染物亚甲基蓝和苯酚的催化活性.根据Ag/TiO2催化剂样品的UV-Vis吸收光谱和XPS表征的Ag粒子结合能,探讨了可见光激发Ag/TiO2的催化机理.同时,实验了催化剂在太阳光照射下对城市污水水样的催化净化作用.结果表明,以8 nm银胶粒子负载形成的0.5%Ag/TiO2光催化剂具有较高的可见光光催化活性;当用这一催化剂催化净化城市污水水样时,催化后水质依照COD值进行评价能够达到国家城市污水处理厂排放一级A标准.
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