Zhang Ruiyi, Gao Ya, Chen Lan, Li Dexing, Ge Guanglu
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Chemphyschem. 2023 Nov 2;24(21):e202300429. doi: 10.1002/cphc.202300429. Epub 2023 Aug 23.
Combustible gas-gas reactions usually do not occur spontaneously upon mixing without ignition or other triggers to lower the activation energy barrier. Nanobubbles, however, could provide such a possibility in solution under ambient conditions due to high inner pressure and catalytic radicals within their boundary layers. Herein, a tunable gas-gas reaction strategy via bulk nanobubble pathway is developed by tuning the interface charge of one type of bulk nanobubble and promoting its fusion and reaction with another, where the reaction-accompanied size and number concentration change of the bulk nanobubbles and the corresponding thermal effect clearly confirm the occurrence of the nanobubble-based H /O combustion. In addition, abundant radicals can be detected during the reaction, which is considered to be critical to ignite the gas reaction during the fusion of nanobubbles in water at room temperature. Therefore, the nanobubble-based gas-gas reactions provide a safe and efficient pathway to produce energy and synthesize new matter inaccessible under mild or ambient conditions.
可燃气体与气体的反应通常在混合时不会在没有点火或其他降低活化能垒的触发因素的情况下自发发生。然而，由于纳米气泡内部压力高且其边界层内存在催化自由基，纳米气泡在环境条件下的溶液中可能提供这样一种可能性。在此，通过调节一种体相纳米气泡的界面电荷并促进其与另一种体相纳米气泡的融合与反应，开发了一种通过体相纳米气泡途径的可调谐气体与气体反应策略，其中体相纳米气泡的反应伴随尺寸和数量浓度变化以及相应的热效应清楚地证实了基于纳米气泡的H /O燃烧的发生。此外，在反应过程中可以检测到大量自由基，这被认为对于在室温下水中纳米气泡融合过程中点燃气体反应至关重要。因此，基于纳米气泡的气体与气体反应提供了一条安全高效的途径，可用于生产能量和合成在温和或环境条件下无法获得的新物质。
