摘要
采用声源频率为1.8MHz的连续声波在声强0～5W·cm-2间研究了连续混响声场中声化学产领以溶液的电导率改变、溶液pH值改变和KI溶液的I2析出量以及空化水中的水合负电子表征与声强和超声辐照时间之间的关系.理论推论与实验结果均表明连续声场中声化学产额与声强、超声辐照时间之间呈线性关系.并证明了声场中声化学反应动力学方程具有简单线性关系,与Henglein等人对脉冲声场中声化学产额与声场参数之间呈非线性关系的研究结果比较,证明对实际工业化运行的声化学反应器,采用连续声波更利于目标反应生成物的控制。
Ultrasound of frequencey 1.8 MHz, sound intensity 1 similar to 5 W . cm(-2) were used to induce sonochemical reaction in near field acoustical sonochemical reactor. It was found that the sonochemical yield (expressed by the electro-conductance, the pH value, I-2 releasing from KI solution and e(aq)(-) generation in cavitation water) have linear relation with sound intensity and irradiation time. These results were compared with the sonochemical yield in pulsed ultrasonic field. The cavitational bubble's amount in cavitational sound field is also presented.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2001年第11期1031-1035,共5页
Acta Physico-Chimica Sinica
基金
环境模拟与污染控制国家重点联合实验室资助040020~~
