摘要
以稻壳为原料制备纳米结构SiO2 ,并用X 射线衍射、扫描电镜、透射电镜以及小角X 射线散射对其结构进行了表征。结果表明 ,由稻壳制备的SiO2 具有分层结构 :由硅氧四面体无规连接构成粒径为 4nm左右、表面分形维数Ds≈ 2 3的一次粒子 ;一次粒子聚集成粒径 30～ 5 0nm、质量分形维数Dm≈ 2 7的二次粒子。
Silica with nanostructure was produced from rice husk.X-ray diffraction(XRD),field-emission scanning electron microscope(FESEM),transmission electron microscope(TEM),and small-angle X-ray scattering(SAXS)were used to characterize its structure. The results showed its hierarchical structure: silicon-oxygen tetrahedra structural units connect with each othe randomly to develop about 4nm primary particles with surface fractal dimension D s≈2.3; primary particles are aggregated into 30～50nm secondary particles with mass fractal dimension D m≈2.7.
出处
《合成材料老化与应用》
2004年第4期1-3,共3页
Synthetic Materials Aging and Application
基金
国家自然科学基金资助项目 (2 99740 0 9)
