固/液界面纳米气泡形成及稳定性研究进展

Formation and stability of nanobubble at solid/liquid interface

固/液界面上形成界面纳米气泡(SNBs),广泛存在于电催化、流体输送、矿物浮选等领域中,并影响各个过程的效率,因此明确其形成及稳定机理对过程调控具有重要意义。首先从实验观察和模拟计算两个角度,对纳米气泡的研究方法进行探讨,综述了不同气体类型、固体界面性质、液相添加剂下纳米气泡的形成规律。由于目前纳米气泡形成后的稳定性尚不十分明确,主要总结了现阶段广为接受的接触线钉扎稳定机制,并分析了该领域的研究现状。此外,考虑到离子液体作为重要的化工溶剂,概述了该体系中微纳气泡的相关研究。最后简要对未来工作进行了展望,以期为离子液体体系中纳米气泡的研究提供新思路。

The behavior of surface nanobubbles (SNBs) form at the solid/liquid interface is widely found in industrial fields such as electrocatalysis, fluid transport, and mineral flotation, which can affect the efficiency of the processes in these fields. So, it is essential to regulate the process of bubble formation, in which the clarification of their formation and stabilization mechanisms were required. Here, this article described the research methodologies of nanobubbles formed from both experimental and computational perspectives, discussed the regular pattern of nanobubbles formation under gas types, solid interface properties, and liquid phase additives. Since the stability of nanobubbles after formation is not very clear at present, this article integrated the widely accepted stabilization mechanism of contact line pinning to show the current status of this research area. In addition, considering ionic liquids as important chemical solvents, this article provided an overview of the research on micro-nano bubble formation in ionic-liquid-system. Finally, this review concluded with a prospect of the future, and this article was expected to provide new insights for the study of nanobubbles in ionic-liquid-system.