中文摘要：

为了研究温度对吸附相制备过程中吸附和反应的影响，在SiO2表面利用吸附相反应技术制备了不同温度下的TiO2纳米粒子．经过电子色散能谱仪和X射线衍射仪（XRD）对0～80℃样品的质量分数和晶粒粒径分析表明，载体表面Ti摩尔分数和晶粒粒径曲线在40-60℃有一个突变，而在其他温度范围则呈现比较平缓的变化．透射电子显微镜（TEM）照片显示样品存在着两个不同的形貌特征：均匀覆盖表面的黑色区域和少量粒径在几十个纳米的单一粒子．根据硅胶表面的吸附特性构建了吸附层的形成、随温度变化以及其中的反应过程理论，并在此基础上提出吸附层在法线方向和切线方向均存在不均匀性，法线方向上吸附层存在化学吸附和物理吸附两种状态，对应于Ti摩尔分数温度曲线上的两个平台；切线方向上吸附层厚度不等导致粒子大小的分布．

英文摘要：

TiO2 nanoparticles on SiO2 surface were prepared by adsorption phase nanoreactor technique at different temperature to study the effect of temperature on adsorption and reaction in preparation procedures. Electronic energy spectrum and X-ray diffractometer（XRD） indicated there was a sharp decrease both in TiO2 quantity curve and in grain size curve between 40-60℃. In the transmission electron microscope （TEM） picture, samples manifested two characteristics： uniform covered black regions on silica and few single image with diameter of several tens of nanometers. Based on the characteristics of adsorption on silica surface, the phenomenology theory dealting with formation of adsorption layer and its variation with temperature, as well as the reaction in them was proposed. It was deduced that the adsorption layer was heterogeneous in normal and tangential direction. In normal direction, the adsorbing molecular occupied two states of chemical-adsorption and physical-adsorption, which corresponded to the two flattened rangs in the TiO2 quantity curve. On the other hand, the unequal thickness distribution of adsorption layer in tangential direction resulted in the size distribution of nanoparticles.