Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2010 Jan 1;341(1):23-9.
doi: 10.1016/j.jcis.2009.09.018. Epub 2009 Sep 18.

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

Xiao-Dong Wang  1 , Zheng-Xiang Shen, Tian Sang, Xin-Bin Cheng, Ming-Fang Li, Ling-Yan Chen, Zhan-Shan Wang
Affiliations

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

Xiao-Dong Wang et al. J Colloid Interface Sci. .

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 suspension achieves a maximum value of 7.45% at 1.24 M TEOS. Various-sized particles in the range of 30-1000 nm are synthesized. The influences of TEOS, NH(3), and H(2)O on the size and size distribution of the particles are discussed. A modified monomer addition model combined with aggregation model is proposed to analyze the formation mechanism of silica particles.

PubMed Disclaimer

LinkOut - more resources