高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1649.

• 研究论文 • 上一篇    下一篇

频谱分析法研究超声对电化学反应中传质过程的影响

鄂利海1, 周定2, 孙伟1, 栾耕时1, 陈家福1   

  1. 1. 抚顺石油学院环境工程系, 抚顺 113001;
    2. 哈尔滨工业大学环境科学与工程系, 哈尔滨 150006
  • 收稿日期:2000-10-27 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 鄂利海(1958出生),男,博士,副教授,从事环境化工研究.

Spectrum Analysis of the Effect of Ultrasound to Mass Transfer Process in Electrochemical Reaction

E Li-Hai1, ZHOU Ding2, SUN Wei1, LUAN Geng-Shi1, CHEN Jia-Fu1   

  1. 1. Department of Environmental Technology, Fushun Petroleum Institute, Fushun 113001, China;
    2. Departmentof Environmental Scienceand Technology, Harbin Institute of Technology, Harbin 150006, China
  • Received:2000-10-27 Online:2001-10-24 Published:2001-10-24

摘要: 采用频谱分析法对超声作用下Fe(CN)63-/Fe(CN)64-氧化还原体系在Pt微电极上的计时电流实验数据进行分析.通过离散傅里叶变换(DFT)将复杂的时域谱转化为频域谱,较清楚地将超声对电极反应的影响区分为不同频率下的幅值信号.对不同超声条件下的分析结果表明,该方法可定量地分析不同超声条件下超声对传质过程的影响,并分析了超声强度随作用距离增大而衰减的规律.在相同超声条件下的实验结果表明,经DFT处理后的幅值信号大小与反应物浓度成正比.

关键词: 功率超声, 频谱分析, 传质过程

Abstract: Spectrum analysis method was used to study the currents of chronoamperometry of Fe(CN)63-/Fe(CN)64- at Pt microdisk electrode under ultrasound. Through the DFTcan transform the complicate Time spectrum to simple frequency spectrum in some special frequencies, which have specific amplitudes relatived to different mass transfer process of ultrasound. This method can be used to analyse the effect of ultrasound under different conditions, and gives a quantification result. The decay rule of effect of ultrasound with the distance between sono-horn and surface of electrode was also studied.

Key words: Power ultrasound, Spectrum analysis, Mass transfer process

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