用溶胶-凝胶法制备了一种新型可见光催化剂Ni2O3/TiO2-xNx,用热分析、X射线光电子能谱及X射线衍射等进行了分析表征,并以偶氮染料阳离子红为目标污染物,分析了催化剂可见光下的催化活性.结果表明,Ni2O3/TiO2-xNx催化剂样品450℃处理后呈锐钛矿型.N元素进入TiO2晶格,Ni元素以Ni2O3的形式游离于TiO2晶格之外.相对于无掺杂TiO2,Ni2O3/TiO2-xNx催化体系由于N元素的掺杂使其在可见光区域的吸收大大增强, Ni2O3掺入加快了光生电子-空穴的分离和转移,因此可见光下的催化活性和光电化学活性大大提高.
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