采用溶胶-凝胶法,在电场热处理条件下,合成了晶粒尺寸为40～50nm的TiO2-ZrO2复合薄膜.通过X光电子能谱(XPS)及X射线衍射(XRD)分析,确定了部分N原子在TiO2网络结构中以取代O原子的形式存在,即复合薄膜中形成了非整比化合物TiO2-rNr;通过紫外可见光谱(UV-VIS)测试薄膜的吸收光谱,观察到掺N复合薄膜的吸收截止波长为550nm,复合薄膜对500nm左右的可见光波段仍有显著吸收,说明吸收边发生了红移;光催化实验表明:在紫外及可见光催化下,掺N复合薄膜对大肠杆菌的灭菌率均有较大提高,以取代形式掺杂的N对窄化带隙和提高可见光催化活性起到了非常重要的作用.
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