Preparation of Nano-SiO2 by Silica Sol In-Situ Complexation Protective Precipitation Method

In this study, nanosilica particles were prepared from self-made silica gel under the protection of citric acid in situ complexation and ethyl acetate as latent reagent. The effects acetate, acid, reaction temperature, time on particle size studied. optimum process parameters determined follows: Vethyl acetate: Vsilica sol = 9:50, addition amount 3.64%, 8 h, temperature 70 °C. products characterized by IR, XRD, SEM TEM analyses. results show that nano-silica precipitation method employing silicon source has good dispersion with average controlled about 19.44 nm. numerous advantages over conventional inverse extraction colloid protection, is expected to achieve industrial production.