Preparation of Hollow Silica Microspheres with Nanoporous Shells by Soft Template Method

Abstract:

A kind of new hollow silica microspheres were proposed in experiment, which are fabricatted by a fast hydrolysis and condensation of tetraethyl orthosilicate taking place around multi-lamellar octylamine vesicles. The morphology of the vesicles is then fixed by a quick gelation process, resulting in hollow organo-silica spheres. After the removal of the template by calcination, nanopores are formed in the hollow shells. The results show that the synthesized hollow silica microspheres have smooth surface and dispersed well£®There are bimodal nanopores in the hollow silica microspheres, with a diameter of 2.1 nm and 0.62nm for the mesopores and micropores respectively, giving a specific surface area of 1123m² /g and a pore volume of 0.6291mL/g£®

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 63-66
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.63
• Online since: March 2014
• Authors: Xue Ye Sui, Jie Xu, Chong Hai Wang, Chang Ling Zhou, Rui Xiang Liu
• Keywords: Hollow Silica Microsphere, Nanoporous Shell, Soft Template

References

[1] C.E. Fowler, D. Khushalani and S. Mann. Chem. Commun. 2001, 2028–(2029).

[2] Cochran J.K. Current Opin Solid State & Mater. Sci., 1998, 3: 474-479.

[3] V. Jokanovic, A.M. Spasic, D. Uskokovic. Colloid and Interface Science, 2004, 278: 342–352.

[4] Caruso F., Chem. Eur. J. 2000, 6(3): 413-419.

[5] H.P. Hentze, S.R. Raghavan, C.A. McKelvey, et al. Langmuir, 2003, 19(4): 1069-1074.