Micelle Structure in a Deep Eutectic Solvent for the Electrochemical Preparation of Nanomaterials
Micelle Structure in a Deep Eutectic Solvent for the Electrochemical Preparation of Nanomaterials
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DOI：
10.1021/acs.langmuir.8b01896
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发表时间：
2018-09-04
期刊：
影响因子：
3.9
通讯作者：
Liu, Yan-Ru
中科院分区：
文献类型：
--
作者：
Hsieh, Yi-Ting;Liu, Yan-Ru
据报道，表面活性剂在低共熔溶剂 (DES) 中进行电沉积时会发生自聚集。研究了阴离子表面活性剂十二烷基硫酸钠 (SDS) 在广泛使用的 DES（氯化胆碱-尿素混合物（ChCl-尿素））中的物理性质和电化学行为。根据表面张力和电导率测量，在 ChCl-尿素系统中形成的 SDS 胶束在较高温度（即 90 摄氏度）下保持稳定。循环伏安法和计时电流法数据表明，在 DES 中添加 SDS 可能会改变电沉积过程中发生的成核和生长过程。扫描电子显微镜图像显示，SDS 吸附可防止电沉积过程中枝晶的形成。提出了一种在 DES 电沉积系统中形成 SDS 胶束的简单机制。
The self-aggregation of a surfactant in a deep eutectic solvent (DES) for electrodeposition is reported. The physical properties and electrochemical behavior of an anionic surfactant, sodium dodecyl sulfate (SDS), in a widely used DES, a choline chloride-urea mixture (ChCl-urea), were investigated. On the basis of surface tension and the conductivity measurements, the SDS micelles that were formed in the ChCl-urea system remained stable at higher temperatures, that is, 90 degrees C. Cyclic voltammetric and chronoamperometric data indicate that the addition of SDS to the DES may alter the nucleation and the growth processes that occur in the electrodeposition process. Scanning electron microscopy images show that the SDS adsorption prevents dendrite formation during the electrodeposition process. A simple mechanism for the formation of the SDS micelles in the DES system for electrodeposition is proposed.