利用微波化学合成法制备了具有高活性的可见光响应氮掺杂纳米TiO2光催化剂.采用XRD、XPS、UV-vis等手段对样品的性能进行了表征分析,并以甲基橙为目标降解物,考察了催化剂在普通日光灯照射下的光催化活性.结果表明,所制备的N-TiO2粉体在400℃、450℃、500℃、550℃热处理4h后仍为锐钛矿相;光催化剂中的N以共价键的形式存在于TiO2晶格中;样品的吸收阈值波长可红移至500nm左右;当煅烧温度为400℃时,样品表现出较好的光催化活性.
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