硅酸钠法合成高比表面多孔二氧化硅

Preparation of Porous SiO 2 with High Specific Surface Area by Sodium Silicate

以硅酸钠和盐酸为原料，用化学沉淀法制备高比表面多孔ＳｉＯ２，并对其性能进行了研究．结果表明，所合成的ＳｉＯ２比表面积可达１３００ｍ２／ｇ以上，具有蜂窝状的微孔，孔径均匀，而且性能稳定．

The synthesis and characterization of the amorphous porous silica are reported in this paper. The silica was prepared by chemical precipitation from sodium silicate and chlorohydric acid in the presence of a surfactant, and the silica powders with a high specific surface area ( >1 300 m 2/g) has a uniform pore diamater about 2 7 nm.