以绢云母为载体,采用水解-沉淀法制备出了绢云母负载纳米TiO2粉体(TiO2/M),在粉体表面沉积不同量的Ag2CO3,经400℃焙烧,制得不同掺Ag量的绢云母负载TiO2光催化剂,采用TG、XRD、SEM、EDS、UV等手段对样品进行了性能表征;并以日光色镝灯为光源,甲基橙为模拟污染物检测其光催化活性,研究了Ag的掺杂量对粉体中TiO2晶相结构、粒度和光催化性能的影响.结果表明:纳米TiO2均匀负载在绢云母上形成包覆层,Ag的掺杂抑制了TiO2晶粒的长大,减缓锐钛矿向金红石相的转变,同时Ag的掺杂形成新的能级结构,随Ag+/Ti4+摩尔比的增加,样品对光的吸收边逐渐红移至440～520 nm,具有明显的可见光响应,当Ag+/Ti4+=0.05时,制得样品对甲基橙的光催化降解率是没有掺Ag的样品的1.5倍,相同条件下重复利用4次,该样品60 min对甲基橙的降解率仍然可达34%.
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