A Generalized Model for Describing Particle Formation in the Synthesis of Monodisperse Oxide Particles Based on the Hydrolysis and Condensation of Tetraethyl Orthosilicate

2000 ◽  
Vol 232 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Daisuke Nagao ◽  
Tomoaki Satoh ◽  
Mikio Konno
Keyword(s):  
Particle Formation ◽  
Tetraethyl Orthosilicate ◽  
Generalized Model ◽  
Hydrolysis And Condensation ◽  
Oxide Particles

Solvent Effects on Particle Formation in Hydrolysis of Tetraethyl Orthosilicate

2005 ◽  
Vol 35 (3) ◽  
pp. 197-201 ◽  
Author(s):  
Eiichi Mine ◽  
Daisuke Nagao ◽  
Yoshio Kobayashi ◽  
Mikio Konno
Keyword(s):  
Solvent Effects ◽  
Particle Formation ◽  
Tetraethyl Orthosilicate ◽  
Hydrolysis Of

Particle formation in the hydrolysis of tetraethyl orthosilicate in pH buffer solution

2004 ◽  
Vol 279 (1) ◽  
pp. 143-149 ◽  
Author(s):  
Daisuke Nagao ◽  
Hideyuki Osuzu ◽  
Akira Yamada ◽  
Eiichi Mine ◽  
Yoshio Kobayashi ◽  
...  
Keyword(s):  
Particle Formation ◽  
Tetraethyl Orthosilicate ◽  
Buffer Solution ◽  
Ph Buffer Solution ◽  
Ph Buffer ◽  
Hydrolysis Of

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

2011 ◽  
Vol 189-193 ◽  
pp. 4335-4338
Author(s):  
Shi Quan Liu ◽  
Jian Cun Rao ◽  
Hai Xia Wang ◽  
Hui Zhao
Keyword(s):  
Mesoporous Silica ◽  
Reaction Medium ◽  
Tetraethyl Orthosilicate ◽  
Hollow Microspheres ◽  
Simple Synthesis ◽  
Simple Reaction ◽  
Volume Contraction ◽  
Silica Source ◽  
Hydrolysis And Condensation

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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