中文摘要：

采用非均相沉淀的方法，首次在纳米TiO2的表面诱导沉积一层羟基磷灰石（HAP）。通过X射线衍射（XRD）和傅立叶红外光谱（FT-IR）对制备的样品进行结构和成分分析；用原子力显微镜（AFM）、扫描电子显微镜（SEM）和电子能谱仪（EDS）对样品包覆进行表征；采用甲基橙的光催化降解反应和大肠杆菌吸附率测定对所制光催化剂的光催化活性和吸附特性进行了评价；并与纯的纳米TiO2进行比较分析，文中还初步探讨了TiO2／HAP纳米复合材料的包覆机理．结果表明，TiO2／HAP为核壳结构，且包覆均匀，羟基磷灰石包覆层的厚度为8nm。所制备的样品具有良好的光催化活性和对细菌良好的吸附性能。这种核壳型TiO2／HAP纳米复合材料可用作环境净化和杀菌材料．

英文摘要：

The nucleus/shell titania/hydroxyapatite （TiO2/HAP） complex nanophotocatalyst was prepared by heterogeneous precipitation method for the first time. The microstructure and morphology of the resulting samples were investigated by X-ray diffraction （XRD）, fourier-transform infrared spectroscopy （FT-IR）, scanning electron microscopy （SEM）, energy dispersive spectrum （EDS） and atomic force microscope （AFM）. Photocatalytic decomposition of methyl orange and the adsorption of the Escherichia coli were utilized to test the photocatalysis and the adsorptive abilities of the resulting sample and the result was compared with that of pure anatase titania powders. At the same time, the coating mechanism of the TiO2/HAP composites had been preliminary discussed. The results indicated that nucleus/shell structural TiO2/HAP was formed in our experiments and the thickness of the coating layer was about 8nm. It was shown that the samples had a fine phtocatalytic activity and adsorptive ability. They can be used for environmental purification or as antibacterial materials.