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Identification of montmorillonite particle edge orientations by atomic-force microscopy
Abstract Statistical information on the edge surface area and edge crystallographic orientation of clay nanoparticle surfaces is essential for proper accounting of the protonation-deprotonation reactions as a part of mechanistic surface complexation models. A combination of atomic-force microscopy (AFM) measurements and molecular dynamics computer simulations made it possible to quantify the relative contributions of the most frequently occurring montmorillonite edge surfaces to the total edge surface area. Edge surfaces normal to the [110] and [010] crystallographic directions are found to be the most abundant (~60% and ~20%, respectively), in agreement with previous estimations.
Graphical abstract Display Omitted
Highlights Atomic-force microscopy allows to measure montmorillonite particles edges relationship. The total edge specific surface area for montmorillonite is on the order of ~ 4.3 ± 0.2 m2 g−1. The relationship between (110), (010) and (130) edges are ~ 60%, 20%, and 10%, respectively.
Identification of montmorillonite particle edge orientations by atomic-force microscopy
Abstract Statistical information on the edge surface area and edge crystallographic orientation of clay nanoparticle surfaces is essential for proper accounting of the protonation-deprotonation reactions as a part of mechanistic surface complexation models. A combination of atomic-force microscopy (AFM) measurements and molecular dynamics computer simulations made it possible to quantify the relative contributions of the most frequently occurring montmorillonite edge surfaces to the total edge surface area. Edge surfaces normal to the [110] and [010] crystallographic directions are found to be the most abundant (~60% and ~20%, respectively), in agreement with previous estimations.
Graphical abstract Display Omitted
Highlights Atomic-force microscopy allows to measure montmorillonite particles edges relationship. The total edge specific surface area for montmorillonite is on the order of ~ 4.3 ± 0.2 m2 g−1. The relationship between (110), (010) and (130) edges are ~ 60%, 20%, and 10%, respectively.
Identification of montmorillonite particle edge orientations by atomic-force microscopy
Kraevsky, Sergey V. (author) / Tournassat, Christophe (author) / Vayer, Marylène (author) / Warmont, Fabienne (author) / Grangeon, Sylvain (author) / Ngouana Wakou, Brice F. (author) / Kalinichev, Andrey G. (author)
Applied Clay Science ; 186
2020-01-08
Article (Journal)
Electronic Resource
English
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