Microscopic Insights into the Fluorite/Water Interfaces from Vibrational Sum Frequency Generation Spectroscopy
Microscopic Insights into the Fluorite/Water Interfaces from Vibrational Sum Frequency Generation Spectroscopy
复制标题
通过振动和频发生光谱对萤石/水界面的微观观察
DOI:
10.1007/978-3-319-47066-5_10
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发表时间:
--
期刊:
影响因子:
--
通讯作者:
M Sulpizi
中科院分区:
文献类型:
--
作者:
R Khatib;M Sulpizi
Water/mineral interfaces are central to a wide range of environmental and technological processes. In this report we provide a quantitative, molecular-level understanding of the CaF2/water interface using Density Functional Theory-based molecular dynamics simulations. In particular through the comparison of calculated Vibrational Sum Frequency Generation spectra to the experimental ones, we give a structural characterisation of the interface at different pH. At low pH, the surface is positively charged, causing a substantial degree of water ordering. Our results suggest that the surface charge originates from the dissolution of fluoride ions of the topmost layer, rather than from proton adsorption to the surface. At high pH we observe the presence of Ca-OH species pointing into the water. Such OH groups do not establish hydrogen bonds with the surrounding water, and are therefore responsible for the “free OH” signature which is recorded in the Vibrational Sum Frequency Generation spectrum.
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DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
影响因子:
4.4
作者:
G. Walrafen;R. Douglas
通讯作者:
R. Douglas
影响因子:
4.6
作者:
Khatib R;Backus EH;Bonn M;Perez-Haro MJ;Gaigeot MP;Sulpizi M
通讯作者:
Sulpizi M
DOI:
--
发表时间:
2012
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
T. Ishiyama;Hideaki Takahashi;A. Morita
通讯作者:
A. Morita