Ion trapping on silica nanoparticles: Effect on the ζ-potential
| Autor: | A. M. Figueiredo Neto, Giovanni Barbero, F. Batalioto |
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| Rok vydání: | 2017 |
| Předmět: |
Langmuir
Materials science General Physics and Astronomy Thermodynamics Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ion trapping 0104 chemical sciences Condensed Matter::Soft Condensed Matter Spherical geometry Adsorption Desorption Poisson's equation 0210 nano-technology Saturation (chemistry) |
| Popis: | We propose a model to interpret the concentration dependence of the ζ-potential of a suspension of silica nanoparticles of spherical shape in an electrolytic solution. The model is based on the numerical solution of Poisson-Boltzmann equation, in spherical geometry, taking into account the ionic adsorption from the nanoparticles. The kinetic equation used for the description is a generalization of the Langmuir's isotherm, modified to take into account the saturation of the adsorption phenomenon. A good agreement between the theoretical model and the experimental data is found. The model allows the determination of adsorption/desorption parameters of the nanoparticles. |
| Databáze: | OpenAIRE |
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