Mechanism of enhancement of sonochemical-reaction efficiency by pulsed ultrasound

被引：47
|
作者：
Tuziuti, Toru [1 ]
Yasui, Kyuichi [1 ]
Lee, Judy [1 ]
Kozuka, Teruyuki [1 ]
Towata, Atsuya [1 ]
Iida, Yasuo [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Moriyama Ku, Nagoya, Aichi 4638560, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2008年 / 112卷 / 22期
关键词：
D O I：
10.1021/jp802640x
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The enhancement of sonochemical-reaction efficiency by pulsed ultrasound at 152 kHz has been studied experimentally through absorbance measurements of triiodide ions from sonochemical oxidation of potassium iodide at different liquid volumes to determine sonochemical efficiency defined by reacted molecules per input ultrasonic energy. The mechanism for enhancement of the reaction efficiency by pulsed ultrasound is discussed using captured images of sonochemiluminescence (SCL), and measured time-resolved signals of the SCL pulses and pressure amplitudes. The high. sonochemical-reaction efficiency by pulsed ultrasound, compared with that by continuous-wave ultra-sound, is attributed both to the residual pressure amplitude during the pulse-off time and to the spatial enlargement of active reaction sites.
引用
收藏
页码：4875 / 4878
页数：4
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