多孔二氧化硅干凝胶的制备及其液相吸附特性研究

Preparation of silica xerogels and study of their liquid phase absorption properties

摘要:

以氢氟酸(HF) 为催化剂,采用直接常压干燥法制备比表面积为450—800m2/g的多孔SiO2干凝胶。在此基础上研究了原料配比和热处理温度对干凝胶的影响，并通过紫外分光光度计对制得的SiO2干凝胶的吸附性能进行了研究，结果表明SiO2干凝胶是一种良好的液相吸附材料。

Abstract:

With HF as catalyst, nano-porous silica xerogels which have high specific surface area (450—800m2/g) have been directly prepared at ambient pressure. Based on experiments, the influence of stuff proportion and heating temperature has been investigated, and the adsorption capacities of the silica xerogels have been studied by ultraviolet spectrophotometer. The results show that the silica xerogels are suitable for liquid absorption applications.