Abstract

Hydrogen・oxygen nanobubbles were generated in 0.1-1.0 m mol/L Na2SO4 solutions using anomalous high-frequency AC electrolysis (-pole and ±poles, 30 kHz). The bubble size distribution was 20-600 nm. The maximum bubble number density was about 4 million per milliliter at the size distribution position of 100 nm. The bubble number density of the solution boiled for 2 min did not decrease, but instead increased slightly. After 26 days, the nanobubbles were found to exist almost stably.

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