Preparation of SiO₂ nanoparticles by silicon and their dispersion stability

Abstract

Silicon dioxide sol was synthesized by silicon in the presence of alkali catalyst. SiO₂ nanoparticles (size in 8–15 nm) aqueous dispersion was prepared by using dispersion and surface modification in situ. The effects of reaction time, temperature, medium pH value, dispersant and surface-modifier on their diameters, sizes distribution and dispersion stability were also studied. The experimental results show that the preparation method can effectively resolve the dispersion stability of SiO₂ nanoparticles in water.

Keywords

nanoparticles / forming in situ / surface-modification / size distribution / dispersion stability

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