模板合成法制备中孔纯硅分子筛的协同作用路线

Cooperation route to prepare mesoporous pure silica molecular sieve by template

采用了无机物硅酸钠作为硅源 ,制备中孔纯硅分子筛 ,探讨了溶胶生成、晶化过程、煅烧脱模过程中各条件对反应物种行为的影响 ,确定了在本合成研究中存在的是协同作用机理 ,并确定适宜的合成条件为表面活性剂质量分数必须达到 1 %以上 (适宜的质量分数为 3 %左右 ) ;合成时pH值应控制在 1 0～ 1 2 ;水热晶化的温度为 1 2 5℃左右 ,晶化时间为 2 4h ;前驱物脱模温度控制在 60 0～ 80 0℃。

Mesoporous pure silica molecular sieve was prepared from inorganic sodium silicate as the silica resource and by employing activity of the reagent under different conditions during the process of sol forming,gelation and aging,and drying to get rid of template.It is proved that there is a cooperation route existing in the synthesis and the optimized conditions for preparation are as follows: concentration of the surfactant solution is above 1%,and suitable concentration is about 3% ; pH value should be controlled between 10 and 12; the gelation step should be kept under 125℃ for 24 h and template removed between 600℃ and 800℃.