The study analyzes the preparation of porous silica gel nanoparticles by double template method.Through this method,the pore sizeof nanoparticle silica microspheres is 18.3 nm,the specific surface area is 589.5 m2·g-1,and the porosity is 2.7 cm3·g-1.The prepared silica nanoparticles is used as the silicon source,micrometer porous silica microspheres with high specific surface area are prepared by polymer-induced colloidal aggregation method.The morphology of the product is characterized by transmission electron microscopy and scanning electron microscopy,and the analysis of particle size is conducted with Mastersizer 2000.The results show that the microporous silica microspheres with large mesoporous structure and high specific surface area can be prepared by this method.The prepared silica microspheres have a large mesoporous size of 35.2 nm,the specific surface area is 756.2 m2·g-1 and the porosity is 2.0 cm3·g-1.
关键词
二氧化硅微球/双模板法/聚合诱导胶体聚集法/硅胶纳米粒子
Key words
Silica microspheres/Double template method/Polymerization induced colloid aggregation method/Silica gel nanoparticles
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