核-壳结构二氧化硅介孔材料的制备与表征

Preparation and Characterization of Core-shell Mesoporous Silica

采用溶胶凝胶法在一定条件下合成了具有核-壳结构的二氧化硅介孔材料,使用透射电子显微镜对微球样品的超微结构进行了观察,使用傅里叶红外光谱分析了样品的光谱性质。分析结果表明:制备的核-壳结构介孔二氧化硅微球样品,是由外表面为孔径约8纳米,厚度约30纳米的有序介孔二氧化硅壳层,包裹着内核为直径约200纳米的二氧化硅微球所组成,介孔壳层具有较大的比表面积,具有良好的光谱性质。

The core- shell mesoporous silica were prepared with a modified sol- gel method under the certain conditions. The ultrastructure of core- shell mesoporous silica were invested by transmission electron microscope（ TEM）. The infrared spectrum of core- shell mesoporous silica were analyzed by using Fourier transformed infrared spectroscopy（ FTIR） methods. The results indicated that the core- shell mesoporous silica was consisted of silica shell which was about 8nm diameter of outside surface and the silica shell of thickness was about 30 nm. It also contained silica microspheres which diameter was about 200 nm. The core-shell mesoporous silica had a larger surface area and perfect spectral characteristic.