Preparation of spherical silica particles by Stöber process with high concentration of tetra-ethyl-orthosilicate.

Abstract

In this paper, Stöber process with high concentration of tetra-ethyl-orthosilicate (TEOS) up to 1.24 M is used to prepare monodisperse and uniform-size silica particles. The reactions are carried out at [TEOS]=0.22-1.24 M, low concentrations of ammonia ([NH(3)]=0.81[TEOS]), and [H(2)O]=6.25[TEOS] in isopropanol. The solids content in the resulting… (More)
DOI: 10.1016/j.jcis.2009.09.018

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