Abstract
The effect of types of alcohol, concentrations of alcohol, solution temperature, types of dissolved gases on the rate of Au(III) reduction and amount of gas products were investigated. At 1.0 mM alcohol concentration, a good relationship was observed between the rate of Au(III) reduction and log Pow of alcohol
used. By analyzing the amount of H2O2 formed in the presence and absence of alcohol, it was confirmed that alcohol molecules were accumulated at the interface region of bubbles. To discuss the effect of alcohol vapor
pressure and amount of Ar gas in the solution, 1-hexanol was used as an alcohol additive at different solution
temperature. The rate of Au(III) reduction and the amounts of the pyrolysis products were related to the
amount of Ar gas in the solution. It was suggested that the number of bubbles reached high temperature was
related to the amount of gas in the solution. We also investigated the effect of types of rare gases. The rate of
Au(III) reduction, the amount of the formed H2O2, and the amount of the pyrolysis products were also
reasonably related to the amount of rare gas in water. Furthermore, it was found that the chemical effects of
each bubble would be different among the types of rare gas.
