ICSM, CEA, CNRS, Univ Montpellier, ENSCM, Bagnols-sur-Cèze, France.
ICSM, CEA, CNRS, Univ Montpellier, ENSCM, Bagnols-sur-Cèze, France.
Ultrason Sonochem. 2019 Dec;59:104753. doi: 10.1016/j.ultsonch.2019.104753. Epub 2019 Aug 28.
The presence of salts in a solution is known to affect sonochemistry, but until now no consensus has been reached in the literature on how and why a salt influences sonochemistry. The present study focuses on the effect of NaCl on sonochemical activity and sonoluminescence at 362-kHz frequency in aqueous solutions saturated with He and Ar. It is shown that the presence of salt has a multiple impact: the global population of active bubbles decreases due to the decreasing gas solubility, new chemical reactions involving Na and Cl atoms occur that influence hydrogen and hydrogen peroxide yields and the standing wave component of the US wave is enhanced, favoring sonoluminescence emission. Interestingly, the effect of salt greatly depends on the nature of the saturating gas: for instance, strong acidification occurs under He, while it is limited under Ar.
溶液中盐的存在已知会影响声化学，但迄今为止，文献中尚未就盐如何以及为何影响声化学达成共识。本研究专注于 NaCl 对 362 kHz 频率下 He 和 Ar 饱和水溶液中声化学活性和超声发光的影响。结果表明，盐的存在具有多重影响：由于气体溶解度降低，活性气泡的总体数量减少；涉及 Na 和 Cl 原子的新化学反应发生，影响氢气和过氧化氢的产量；超声驻波分量增强，有利于超声发光发射。有趣的是，盐的影响在很大程度上取决于饱和气体的性质：例如，He 中会发生强烈酸化，而 Ar 中则受到限制。
