Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9529
Title: Pore connectivity effects on the internal surface electric charge of mesoporous silica
Authors: Şen, Tümcan
Barışık, Murat
Şen, Tümcan
Barışık, Murat
Keywords: Mesoporous silica
Internal surface electric charge
Poisson-Nernst-Planck equations
Charge regulation model
Porosity
Pore to throat connectivity
Issue Date: 2019
Publisher: Springer Verlag
Abstract: Nano-scale confinements within mesoporous systems develop overlapping electric double layers (EDL) such that the existing theoretical models cannot predict the electric potential distributions and resulting surface charges. In addition, ionic conditions undergo local variation through connections between the pore voids and pore throats. For the first time in literature, we studied the charging behavior of mesoporous silica in terms of the pore to throat size ratio (R-pt) to characterize the pore connectivity effects, in addition to porosity (epsilon) and pore size (H). Both local and average surface charge densities inside mesoporous silica were examined by varying these parameters systematically. Results showed that the magnitude of surface charge density decreased with increasing EDL overlap and decreasing connectivity effects. We formulized this behavior and developed an extended model to predict mesoporous silica's internal charge as a function of porosity, pore size, and pore to throat size ratio.
Description: Barisik, Murat/0000-0002-2413-1991
WOS: 000488511000011
URI: https://doi.org/10.1007/s00396-019-04555-w
https://hdl.handle.net/11147/9529
ISSN: 0303-402X
1435-1536
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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