A Simple Synthesis of Mesoporous Silica Hollow Microspheres by Fast Hydrolysis and Condensation of Tetraethyl Orthosilicate

Shi Quan Liu; Jian Cun Rao; Hai Xia Wang; Hui Zhao

doi:10.4028/www.scientific.net/AMR.189-193.4335

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 189-193A Simple Synthesis of Mesoporous Silica Hollow...

A Simple Synthesis of Mesoporous Silica Hollow Microspheres by Fast Hydrolysis and Condensation of Tetraethyl Orthosilicate

Abstract:

Mesoporous silica hollow microspheres were quickly synthesized with a simple reaction medium which only contains tetraethylorthosilicate (TEOS) as silica source, octylamine (OA) as template and water. It is proposed that a dispersion of TEOS-in-water is formed when water is added into the mixture of TOS and OA. Water becomes basic due to dissolution of OA. Fast hydrolysis and condensation of TEOS then occurs at the interface of droplets lead to the formation of silica shells. Hollows are formed due to the volume contraction caused by the large difference in the densities of condensed silica and liquid TEOS. In addition, OA assembles with silica, templating the nanopores in the silica shells.

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Periodical:

Advanced Materials Research (Volumes 189-193)

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4335-4338

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.189-193.4335

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Online since:

February 2011

Authors:

Shi Quan Liu, Jian Cun Rao, Hai Xia Wang, Hui Zhao

Keywords:

Condensation, Droplet, Hydrolysis, Mesoporous Silica Hollow Microsphere, Template

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