Ma C Y, Xu J Y, Liu X J
State Key Lab of Modern Acoustics, Nanjing University, Nanjing 210093, China.
Ultrasonics. 2006 Dec 22;44 Suppl 1:e375-8. doi: 10.1016/j.ultras.2006.05.164. Epub 2006 Jun 9.
The degradation of Acid Orange 7 in aqueous solution has been investigated under the irradiation of ultrasound and visible light respectively and simultaneously. We have observed that the maximum removal percentage K increases from 4% to 35% when the ultrasonic frequency f and power P change from f=20 KHz and P=3 W to f=1 MHz and P=40 W. On the other hand, the K-value is approximately 3% under the irradiation of visible light at 632 nm and 100 mW/mm(2). Under the simultaneous irradiation of ultrasound (1 MHz, 40 W) and visible light (632 nm, 100 mW/mm(2)), the K-value reaches to approximately 65%, indicating a synergistic effect of ultrasound and visible light irradiations. A simple model based on the band gap theory and cavitation theory is proposed to explain the synergistic phenomenon.
分别以及同时研究了酸性橙7在水溶液中于超声和可见光照射下的降解情况。我们观察到，当超声频率f和功率P从f = 20 kHz、P = 3 W变化到f = 1 MHz、P = 40 W时，最大去除率K从4%增加到35%。另一方面，在632 nm、100 mW/mm²的可见光照射下，K值约为3%。在超声（1 MHz，40 W）和可见光（632 nm，100 mW/mm²）同时照射下，K值达到约65%，表明超声和可见光照射存在协同效应。提出了一个基于带隙理论和空化理论的简单模型来解释这种协同现象。
