采用硫酸钛与氨水反应制备掺氮TiO2.UV-Vis漫反射谱研究表明掺氮的TiO2在紫外区的吸收边明显红移(约20 nm),并且在400nm～530 nm出现新的吸收区域,光吸收阈值从380 nm扩展到530 nm.XPS分析表明,在TiO2掺杂的N为间隙态,而且还存在大量的氧空位.氧空位在导带下形成的窄带使得掺氮的TiO2在400nm～530 nm出现新的吸收区域.用MTT法测量了掺氮TiO2杀伤白血病HL60细胞的活性.结果显示,无论有无可见光照射,掺氮TiO2对白血病肿瘤细胞杀灭效果明显好于未掺杂TiO2.
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