多峰孔分布硅胶的制备

Preparation of silica gel with multimodal pore distribution

以硫酸及水玻璃溶液为原料,采用反复溶胶-凝胶法,在乙醇/正丁醇/氨水/硫酸(摩尔比)为2∶2∶3∶4,反应温度为30℃的条件下,可制备多峰孔分布的硅胶。结果表明,所制备的硅胶孔容为1.68 cm3/g,孔径为20.28 nm,比表面积为331.4 m2/g。

The silica gel with multimodal pore distribution was prepared by repeated sol - gel method using sulfuric acid and sodium silicate solution as raw materials at alcohol ： butanol ： ammonia ： sulfuric acid （ mole ratio ） 2 ： 2 ： 3 ： 4, reaction temperature 30℃. The results showed that the pore volume, pore size,specific surface area of the prepared silica gel were 1.68 cm3/g,20.28nm and 331.4m2/g respectively.