An interlayer expansion model for counterion-intercalated montmorillonite from first-principles calculations
An interlayer expansion model for counterion-intercalated montmorillonite from first-principles calculations
复制标题
基于第一性原理计算的抗衡离子插层蒙脱土层间膨胀模型
DOI:
10.1016/j.commatsci.2014.09.013
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发表时间:
2015
影响因子:
3.3
通讯作者:
Meng, Yingfeng
中科院分区:
文献类型:
--
作者:
Yang, Mingli;Zhang, Yao;Liu, Houbin;Meng, Yingfeng
From density functional theory calculations on dry and hydrated MMT, Na-MMT, NH4+-MMT, and formamide-MMT structures at various interlayer spacings, we proposed an interlayer expansion model for the counterion-intercalated MMT systems. Complex interactions exist among the counterions, lower and upper MMT surfaces, including ionic bonding, hydrogen bonding, electrostatic attraction/repulsion, and van der Waals forces. These interactions vary with different counterions and different interlayer spacings, playing a crucial role in the energy landscape of interlayer expansion. The equilibrium spacings are related to counterion volume, and the competition between interlayer electrostatic attraction and repulsion. The expansion energy potential near the equilibrium spacings can be approximately described with a quadratic function of spacing increase. At large spacings, however, the counterions have a tendency to form relatively strong interaction with either surface, making their energy potential in MMT approach to constant values.
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影响因子:
3
作者:
Grimme, Stefan
通讯作者:
Grimme, Stefan
影响因子:
3.7
作者:
Andrea Michalkova Scott;M. M. Dawley-M.;T. Orlando;F. Hill;J. Leszczynski
通讯作者:
Andrea Michalkova Scott;M. M. Dawley-M.;T. Orlando;F. Hill;J. Leszczynski
影响因子:
2.2
作者:
Meng, Yingfeng;Lou, Zhaoyang;Zeng, Qun;Yang, Mingli
通讯作者:
Yang, Mingli
影响因子:
56.9
作者:
PINNAVAIA, TJ
通讯作者:
PINNAVAIA, TJ
影响因子:
4.2
作者:
D. Tunega;M. Gerzabek;G. Haberhauer;H. Lischka
通讯作者:
D. Tunega;M. Gerzabek;G. Haberhauer;H. Lischka