Formation and Stability of Bulk Nanobubbles Generated by Ethanol-Water Exchange

Jie Qiu; Zhenglei Zou; Shuo Wang; Xingya Wang; Lei Wang; Yaming Dong; Hongwei Zhao; Lijuan Zhang; Jun Hu

doi:10.1002/cphc.201700010

Formation and Stability of Bulk Nanobubbles Generated by Ethanol-Water Exchange

Chemphyschem. 2017 May 19;18(10):1345-1350. doi: 10.1002/cphc.201700010. Epub 2017 Apr 7.

Authors

Jie Qiu^{1

2

3}, Zhenglei Zou⁴, Shuo Wang¹, Xingya Wang^{1

5}, Lei Wang^{1

5

6}, Yaming Dong⁴, Hongwei Zhao¹, Lijuan Zhang^{1

5}, Jun Hu^{1

2}

Affiliations

¹ Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, P.R. China.
² School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P.R. China.
³ University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
⁴ Life and Environment Science College, Shanghai Normal University, Shanghai, 200234, PR China.
⁵ Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, P.R. China.
⁶ Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha, 610031, P.R. China.

PMID: 28258687
DOI: 10.1002/cphc.201700010

Abstract

Bulk nanobubbles have unique properties and find potential applications in many important processes. However, their stability or long lifetime still needs to be understood and has attracted much attention from researchers. Bulk nanobubbles are generated based on ethanol-water exchange, a method that is generally used in the study of surface nanobubbles. Their formation and stability is further studied by using a new type of dynamic light scattering known as NanoSight. The results show that the concentration of the bulk nanobubbles produced by this method is about five times greater than that in the degassed group, which indicates the existence of bulk gas nanobubbles. The effects of ethanol/water ratios and temperature on the stability of the bulk nanobubbles have also been studied and their numbers reach a maximum at a ratio of about 1:10 (v/v).

Keywords: dynamic light scattering; exchange interactions; liquids; nanostructures; solvent effects.