溶解
电解质
离子强度
表面电荷
水溶液
离子键合
化学物理
化学
表面等离子共振
动力学
碱度
化学工程
材料科学
离子
纳米颗粒
纳米技术
电极
物理化学
有机化学
工程类
物理
量子力学
作者
Aosheng Chang,Ben Niu,Jia Liu,Haoran Han,Zhibing Zhang,Wei Wang
出处
期刊:Particuology
[Elsevier]
日期:2023-10-01
卷期号:81: 128-134
被引量:4
标识
DOI:10.1016/j.partic.2023.01.001
摘要
Surface nanobubbles are spontaneously formed at the interface between hydrophobic surfaces and aqueous solutions, which show extraordinarily longer lifetime than that was predicted by the classical thermodynamics model. In the present work, by using a surface plasmon resonance microscopy (SPRM) to quantitatively measure the dissolution kinetics of individual surface nanobubbles in real time, we explored the effects of ionic strength and pH value on the dissolution rates (lifetime) of nanobubbles. The results revealed that nanobubbles could exist stably for a long time in low-concentration electrolyte solutions or high-concentration non-electrolyte solutions, while they dissolved quickly in high-concentration electrolyte solutions. With the increase of ionic strength, the dissolution rates were accelerated by 2–3 orders of magnitude, and thus the lifespan of these surface nanobubbles was significantly shortened. In addition to ionic strength, it was further found that, with the increase of acidity or alkalinity of the solution, the dissolution rates of the surface nanobubbles were faster than that in neutral solution. These results demonstrated that the interfacial charge enrichment significantly contributed to the extraordinary stability of the surface nanobubbles.
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