Preparation and Formation Mechanisms of Monodispersed Mesoporous SiO₂ Microspheres by the PICA Method

Abstract:

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.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 1153-1156
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.1153
• Online since: February 2007
• Authors: Li Zhao, Jia Guo Yu, Rui Guo, Bei Cheng
• Keywords: Mesoporous, Monodispersed, PICA Method, SiO₂ Microspheres

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DOI: 10.1002/9783527619474.ch11

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