锶离子在纳米TiO_2表面单层分散阈值的研究

The monoplayer dispersion capacity of Sr^(2+) on the surface of nanometer-size TiO_2

采用浸渍法制备了表面吸附Sr2 + 的锐钛型纳米TiO2 系列样品 ,通过XRD法和XPS法研究了Sr2 + 在纳米TiO2 表面单层分散的阈值。两种研究方法测得的阈值均为 1 0个 /nm2 ,按照密置单层模型计算得到估算阈值为5 3个 /nm2 。

A serial samples of anatase nanometer size TiO 2 with Sr 2+ on surface were prepared by a impregnating method, and the monoplayer dispersion capacity of Sr 2+ on the surface of nanometer size TiO 2 was studied by means of XRD and XPS, both of which the capacities determined were 1 0 ions on per square nanometer of TiO 2 surface. The theoretical capacity given by a closely packed monoplayer model was 5 3 ions on per square nanometer of TiO 2 surface, bigger than the practical one.