采用曙红与叶绿素铜三钠对TiO2纳米颗粒进行了光敏化,研究了TiO2纳米颗粒在节能灯光源下的光催化活性.通过XRD、TEM和UV-Vis等手段对TiO2纳米颗粒的物相、粒径、形貌及光学性能进行了表征分析.结果表明:光敏化可以保持TiO2原来的锐钛矿相,对其形貌亦影响甚少;光敏化后的TiO2纳米颗粒在可见光区吸光程度有较大提高,两种光敏剂以协同作用使光谱响应波长向可见光方向移动,拓展了TiO2光谱响应范围.光催化降解实验表明:光敏剂共敏化TiO2纳米颗粒有很好的光催化性能,且敏化温度30℃,敏化时间8h,曙红质量浓度30mg/L及叶绿素铜三钠质量浓度20 mg/L时,光敏化的TiO2纳米颗粒光催化效果最好,节能灯光源下对甲基橙的降解率为61.33％.
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