二氧化钛发光与光催化性能关系的研究

采用水热法，通过添加不同的表面活性剂，制备了3种不同形貌的二氧化钛。使用光致发光光谱仪考察了2%铕掺杂的不同形貌二氧化钛（铕与二氧化钛物质的量比为2%）的发光性能。同时，以甲基橙为目标污染物，考察了3种形貌二氧化钛的光催化性能。结果表明：二氧化钛（铕与二氧化钛物质的量比为2%）的发光性能由强到弱的顺序为花状球、纳米棒、核壳球，而二氧化钛的光催化性能由强到弱的顺序正好相反。这说明二氧化钛的形貌能够明显地影响其性能，发光和催化性能的不同取决于半导体光生电子和空穴的重组和分离效率。

Study on relationship between luminescence and photocatalytic properties of titanium dioxide

TiO2 materials with three different morphologies were prepared by hydrothermal method with the addition of different surfactants.The luminescence properties of 2% Eu doped TiO2 samples were investigated by using a photoluminescence spec trometer.At the same time，the photocatalytic properties of methyl orange samples with three different morphologies were investigated.Results showed that the order of luminescence properties of the TiO2 samples from strong to weak was flower microsp here，nanorod and coreshell microsphere，while the order of catalytic properties of the TiO2 samples was opposite.It indicated that the morphology of the sample can significantly affect its performance，and the difference in luminescence and catalytic perfor mance was determined by the recombination and separation efficiency of semiconductor photogenerated electrons and holes.