Adsorption of sodium iodine at air/water interface

被引：20

作者：

Cuong V Nguyen ^{[1
]}

Nakahara, Hiromichi ^{[2
]}

Shibata, Osamu ^{[3
]}

Chi M Phan ^{[4
,5
]}

机构：

[1] Ton Duc Thang Univ, Fac Appl Sci, Ho Chi Minh City, Vietnam

[2] Daiichi Univ Pharm, Dept Ind Pharm, Minami Ku, 22-1 Tamagawa Cho, Fukuoka 8158511, Japan

[3] Nagasaki Int Univ, Grad Sch Pharmaceut Sci, Dept Biophys Chem, Nagasaki 8593298, Japan

[4] Curtin Univ, Discipline Chem Engn, GPO Box U1987, Perth, WA 6845, Australia

[5] Curtin Univ, Curtin Inst Funct Mol & Interfaces, GPO Box U1987, Perth, WA 6845, Australia

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2020年 / 298卷

关键词：

Sodium iodine; Surface potential; Surface charge; VIBRATIONAL SPECTROSCOPY; MOLECULAR-STRUCTURE; LIQUID INTERFACES; SURFACE-TENSION; FORCE-FIELD; WATER; DYNAMICS; IONS;

D O I：

10.1016/j.molliq.2019.112076

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The change in surface potential was measured for NaI solutions. The modelled surface charge was then calculated and compared with molecular simulations. It was found that I- was enhanced at the air/water interface more than Na+. The result, which was confirmed by simulations, was opposite to the previous observation with NaCl. The trend is also consistent with anionic effects: larger and more polar anions adsorbed stronger at the air/water interface. The theoretical model was applied successfully to describe the changes for both systems, which are positive for NaG and negative for Nal, respectively. The combined results of the two systems also revealed that the self-ionization of pure water induced a positive surface charge at 16.9 mV. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：6

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