中文摘要：

以合成的丙氨酸镉为纳米粒子的前驱体，在不加酸或碱性催化剂的条件下，利用丙氨酸镉分子中的胺基催化硅氧烷水解缩合生成二氧化硅，同时将丙氨酸镉均匀地引入到二氧化硅的内部，通过硫化原位生成硫化镉纳米颗粒，制得硫化镉/二氧化硅（ CdS/SiO2）纳米复合材料。用傅里叶变换红外光谱、核磁共振氢谱、紫外-可见光谱、荧光显微镜和透射电子显微镜等方法对CdS/SiO2复合材料进行表征，结果表明，硫化镉粒子均匀分布在二氧化硅内部，使其具有良好的荧光特性。

英文摘要：

In conventional methods to preparation silica, it is inevitably to use the acid or basic catalysts, which have a destructive effect on molecules or particles that are sensitive to pH. These methods have signifi-cant limitations in the preparation of the silica composites materials. Therefore, it is still a great challenge to find a mild way to synthesize silica. In this paper, we used synthesized of alanine cadmium as a precursor of the nanoparcitles, taking advantage of the amine group in the alanine cadmium molecule as catalyst to catalyze siloxane hydrolysis and condensation without added acid or basic catalysts, meanwhile, the alanine cadmium was introduced to the silica. Then the CdS nanoparcitles were prepared by in situ the way of vulcanization. The characterization of the material through Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, ultraviolet-visible spectrum, fluorescence microscopy and transmission electron microscopy shows that the nanocomposites material with the CdS particle uniformly distribution in silica are synthesized. The material has excellent fluorescence properties.