Preparation and Formation Mechanisms of Monodispersed Mesoporous SiO2 Microspheres by the PICA Method
Monodispersed mesoporous silicon dioxide microspheres were prepared by polymerization-induced colloid aggregation (PICA) method and calcined at 850oC. The prepared samples were characterized with scanning electron microscopy (SEM), thermogravimetry (TG) and BET surface areas. The results showed that the obtained SiO2 microspheres had an average diameter of about 2.0 µm, a surface area of 253.3 m2g-1, an average pore volume of 0.62 mLg-1, and an average pore diameter of 7.9 nm. The formation mechanism of SiO2 spherical particles was discussed.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
L. Zhao et al., "Preparation and Formation Mechanisms of Monodispersed Mesoporous SiO2 Microspheres by the PICA Method", Key Engineering Materials, Vols. 280-283, pp. 1153-1156, 2005