考察了Pt促进的N掺杂TiO2(Pt/N-TiO2)催化剂对光催化降解有机污染物性能的影响及其作用本质.采用X射线衍射、透射电镜、X射线光电子能谱、紫外-可见漫反射光谱、光电化学和荧光光谱等手段对催化剂进行了表征,并考察了样品在可见光下光催化降解甲基橙(MO)的反应性能.结果表明,Pt的存在并未明显改变N-TiO2的晶相和介孔结构,却增强了催化剂对可见光吸收,但这种背景吸收不利于光激发中心(N-TiO2)对可见光的吸收,从而影响Pt/N-TiO2光催化活性;高度分散在N-TiO2表面的Pt,显著地改变了催化剂表面电子结构,从而提高了N-TiO2的光催化性能.
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