Confinement of aqueous mixtures of ionic liquids between amorphous TiO2 slit nanopores: electrostatic field induction.
Confinement of aqueous mixtures of ionic liquids between amorphous TiO2 slit nanopores: electrostatic field induction.
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DOI：
10.1039/c8cp04500c
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
F. Mohammadpour;M. Heydari Dokoohaki;A. R. Zolghadr;M. Ghatee;M. Moradi
中科院分区：
文献类型：
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作者：
F. Mohammadpour;M. Heydari Dokoohaki;A. R. Zolghadr;M. Ghatee;M. Moradi
当疏水和亲水离子液体（ILs）的水混合物被限制在非晶态而非晶态TiO2半导体的狭缝纳米孔之间时，会在表面附近产生静电电位。根据我们的分子动力学（MD）模拟，在这种纳米尺度约束下离子配对寿命的范围大大低于其在体中的值。当使用离子液体电解质的水溶液混合物时，它会变得更低。在受限的稀水电解质体系中，离子-离子的相关性被完全破坏。离子离子的阴离子和阳离子在相对的10 nm的非晶态TiO2电极上迁移积累，形成纳米孔径。相反，我们已经表明，当电解质被限制在锐钛矿（101）TiO2之间时，IL离子之间的静电相互作用占主导地位。在无机电解质体系中也观察到类似的趋势。这些发现为电化学应用的新型电池的设计提供了启示。
Electrostatic potential in the vicinity of the surface is induced when aqueous mixtures of hydrophobic and hydrophilic ionic liquids (ILs) are confined between a slit nanopore of amorphous but not crystalline TiO2 semiconductors. According to our molecular dynamics (MD) simulations, the extent of ion-pairing lifetime under such nanoscale confinement is substantially lower than its value in the bulk. It becomes still lower when aqueous mixtures of ionic liquid electrolytes are used. Ion-ion correlation is broken completely in the confined dilute aqueous electrolyte systems. The anions and cations of the ILs migrate and accumulate at the opposite amorphous TiO2 electrodes that are separated by 10 nm to arrange a nanosize pore. In contrast, we have shown that the electrostatic interactions between the IL ions are dominant when the electrolyte is confined between anatase (101) TiO2. A similar trend is observed for the inorganic electrolyte system. These findings shed light on the design of new cells for electrochemical applications.