首先采用水热合成法和双氧水处理制备了具有锐钛矿相的TiO2纳米管,然后通过沉淀和光化学反应将Ag@AgCl纳米粒子负载于其上,从而制得TiO2纳米管负载的表面等离子体光催化剂.结果表明,经Ag@AgCl纳米粒子修饰后,锐钛矿相TiO2纳米管因表面等离子共振效应而对可见光具有明显的响应,光生电子-空穴对更容易分离,因而TiO2纳米管的可见光催化活性提高.该催化剂对亚甲基蓝分子具有很强的吸附能力,可见光下照射1 h后即可完全降解脱色.另外,该光催化剂重复使用5次后,亚甲基蓝脱色率仍保持在90%以上.
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