以硫酸钛、硝酸铁、尿素为原料,采用自燃烧法制备了氮、铁共掺杂的纳米TiO2粉体.XRD结果显示氮、铁共掺杂的纳米TiO2主要为锐钛矿相.当氮、铁共掺杂时,二氧化钛光谱吸收红移至可见区.XPS结果表明:铁进入TiO2的晶格中形成浅势,氮则取代氧原子形成了N-Ti键,它们的形成降低了二氧化钛的带隙,从而提高了可见光区的光催化能力.当氮、铁对钛的物质的量比分别为0.5%和0.6%时,其在可见光下降解亚甲基蓝的降解率分别是单掺杂和纯TiO2的1.4和3倍.
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