Analytical model for charge properties of silica particles.
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.
Institute of Micro/Nano Technology, Old Dominion University, Norfolk, VA 23529, USA.
Selcuk
S
Atalay
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China. Electronic address: mayu@hit.edu.cn.
Yu
Y
Ma
Institute of Micro/Nano Technology, Old Dominion University, Norfolk, VA 23529, USA. Electronic address: sqian@odu.edu.
Shizhi
S
Qian
D008962:Models, Theoretical; D012822:Silicon Dioxide / Q000737:chemistry*
D012822:Silicon Dioxide
Charge regulation; Surface charge density; Surface chemistry; Zeta potential