用中子衍射和拉曼散射研究NaCl在高压水中的溶解行为

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

High Pressure Research Pub Date : 2021-01-02 DOI:10.1080/08957959.2020.1863962

Qiwei Hu, Ji Chen, Leiming Fang, Xiping Chen, Lei Xie, L. Lei, Chaowen Xu, Guangai Sun, Bo Chen, D. He

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引用次数: 1

摘要

NaCl在水中的溶解度是最重要的热物理性质之一。然而，在高压和低温下，人们对NaCl在水中的溶解行为知之甚少。在此，我们进行了高压中子衍射和拉曼散射，分别研究了NaCl在水中的溶解度和相应的结构变化。随着压力的增加，溶解度在0.2以下几乎线性增加 GPa，超过该值，它开始趋于平稳，并在0.61左右达到最大值 GPa。拉曼光谱表明，氢键网络在NaCl水溶液中的变形促进了离子配对的形成，并导致NaCl在水中的溶解度增加。最后，我们使用二维Mercedes-Benz模型来描述NaCl在高压下在水中的溶解行为。

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The solubility behavior of NaCl in water at high pressure studied by neutron diffraction and Raman scattering

ABSTRACT The solubility of NaCl in water is one of the most important thermo-physical properties. However, the solubility behavior of NaCl in water is poorly understood at high pressure and low temperature. Herein, we performed high pressure neutron diffraction and Raman scattering to investigate the solubility of NaCl in water and the corresponding structural change, respectively. With the pressure increasing, the solubility almost increases linearly below 0.2 GPa, beyond which it starts to level off and reaches its maximum at about 0.61 GPa. The Raman spectra suggested that the deformation of the hydrogen-bonded network in the NaCl aqueous solution promotes the formation of ions pairing and is responsible for the solubility increase of NaCl in water. Finally, we used a two-dimensional Mercedes-Benz model to descript the picture of solubility behavior of NaCl in water at high pressure.

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来源期刊

High Pressure Research 物理-物理：综合

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

2 months

期刊介绍： High Pressure Research is the leading journal for research in high pressure science and technology. The journal publishes original full-length papers and short research reports of new developments, as well as timely review articles. It provides an important forum for the presentation of experimental and theoretical advances in high pressure science in subjects such as: condensed matter physics and chemistry geophysics and planetary physics synthesis of new materials chemical kinetics under high pressure industrial applications shockwaves in condensed matter instrumentation and techniques the application of pressure to food / biomaterials Theoretical papers of exceptionally high quality are also accepted.