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J Colloid Interface Sci. 2014 Jul 1;425:128-30. doi: 10.1016/j.jcis.2014.03.044. Epub 2014 Mar 28.

Analytical model for charge properties of silica particles.

Author information

1
Institute of Micro/Nano Technology, Old Dominion University, Norfolk, VA 23529, USA.
2
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China. Electronic address: mayu@hit.edu.cn.
3
Institute of Micro/Nano Technology, Old Dominion University, Norfolk, VA 23529, USA. Electronic address: sqian@odu.edu.

Abstract

An analytical model for surface charge density and zeta potential of silica particles is derived and verified. The model takes into account surface chemistry reactions of the silanol groups and multiple ionic species. The predictions are in good agreement with the experimental data available from the literature. Surface charge density and zeta potential of silica particles strongly depend on both pH and background salt concentration of the aqueous solution.

KEYWORDS:

Charge regulation; Surface charge density; Surface chemistry; Zeta potential

PMID:
24776673
DOI:
10.1016/j.jcis.2014.03.044
[Indexed for MEDLINE]

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