K. Okitsu, A. Yue, S. Tanabe
Oct 15, 2002
Citations
1
Influential Citations
82
Citations
Quality indicators
Journal
Bulletin of the Chemical Society of Japan
Abstract
The sonochemical reduction of gold(III) [tetrachloroaurate(III)] was carried out under various irradiation conditions in an aqueous solution containing only a small amount of 1-propanol. Identical starting materials and the same initial concentrations were used in each preparation. The rates of gold(III) reduction were strongly dependent on the atmosphere, the temperature of the bulk solution, the intensity of the ultrasound, and the distance of the reaction vessel from the oscillator. For example, the rates of reduction under several atmospheres were in the order of CH4 = CO2 < N2 < Ne < He < Ar < Kr, where no reduction proceeded under the CH4 and CO2 atmospheres. It was clearly found that the rates of reduction were influenced by the cavitation phenomenon. Upon irradiation, colloidal gold particles having a surface plasmon absorption were formed, although in the absence of any stabilizers for the gold particles. It was found by TEM observations that the average size of the formed gold particles changed ...