Preparation of Silica Nanoparticles Using Silica-Rich Filtrate from Potassium-Rich Rock
The silicon-rich filtrate which was obtained from the desilication solution of potassium-rich rock was used as raw materials to prepare nanometer sillica and ultrasonic dispersion method was applied to the chemical precipitation process. A detailed study was carried out on the effect of filtrate concentration, surfactant dosage, reaction temperature, calcinations temperature, ultrasonic dispersion on size of silica nanoparticles. The basic properties and size of particles were characterized by means of FE-SEM, TEM, XRD, TGA and FTIR. The results obtained in the study indicated that monodisperse and uniform-size silica nanoparticles were prepared using ultrasonication by chemical precipitation process and the average particle size was 50 nm.
Guojun Zhang and Jessica Xu
C. C. Yin et al., "Preparation of Silica Nanoparticles Using Silica-Rich Filtrate from Potassium-Rich Rock", Advanced Materials Research, Vols. 160-162, pp. 1372-1377, 2011