中文摘要：

以天然纤蛇纹石为原料，通过酸浸制备纳米纤维状多孔氧化硅，并使用X射线荧光光谱（XRF）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和N2吸附-脱附等温线技术等对其进行表征。研究结果表明：该多孔氧化硅具有独特的纳米纤维状形貌；其结构为无定形，结构组成单元仍为硅氧四面体，但四面体交替上下排列，六元环结构发生高度扭曲变形。纳米纤维状多孔氧化硅比表面积为391．8m^2／g，总孔容为1．05cm^3／g，由吸附-脱附等温线的滞后回线特征判断其结构中的孔主要为缝隙型孔。

英文摘要：

Porous silica with nanofibrous morphology was prepared by acid leaching from natural chrysotile. X-ray fluorescence analysis （XRF）, powder X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR） and N2 adsorption-desorption techniques were used to characterize the acid-leached products. The results show that the porous silica retains special nanofibrous morphology. The silica is amorphous and its structural unit is a SiO4 tetrahedron and six-member silicon-oxygen rings with the tetrahedral positioned alternately up and down in the six-member rings. The porous silica with nanofibrous morphology produces a high surface area of 391.8 m^2/g and total pore volume of 1.05 cm^3/g. The characteristic of hysteresis loop are mainly of slit-shaped pores.