The Principle of Detect SO2 Concentration by Using the Electrochemical Method in Ionic Liquid  

作　　者：HUANG Qing HU Yang WANG Jiakai JIANG Kai WU Tian 

机构地区：[1]College of Chemistry and Life Science, Hubei University of Education, Wuhan 430205, Hubei, China [2]Institute of Materials Research and Engineering(IMRE),Hubei University of Education, Wuhan 430205, Hubei, China [3]College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China [4]School of Materials Science and Engineering, Hubei University, Wuhan 430062, Hubei, China [5]School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei,China

出　　处：《Wuhan University Journal of Natural Sciences》2019年第5期400-404,共5页武汉大学学报（自然科学英文版）

基　　金：Foundation item:Supported by the Natural Science Foundation of Hubei Province(2018CFC827);College Outstanding Young Scientific and Technological Innovation Team of Hubei Province(T201620)

摘　　要：The reduction of SO2 with different concentrations at a platinum microelectrode was investigated by cyclic voltammetry(CV) in 1-(butyl)-3-methylimidazolium hexafluorophosphate([Bmim]PF6). We speculated that the reaction mechanism of reduction may form a macromolecular complex, and the higher the concentration of SO2, the larger the molecular weight of the complex. The higher the concentration of SO2, the greater the diffusion coefficient of SO2 in [Bmim]PF6. There is a good quadratic function relationship between the reduction peak current and SO2 concentrations in the range from 2% to 100%, which promises a kind of ionic liquid electrolyte for the detection of SO2 gas with a wide range of concentrations.The reduction of SO2 with different concentrations at a platinum microelectrode was investigated by cyclic voltammetry（CV） in 1-（butyl）-3-methylimidazolium hexafluorophosphate（[Bmim]PF6）. We speculated that the reaction mechanism of reduction may form a macromolecular complex, and the higher the concentration of SO2, the larger the molecular weight of the complex. The higher the concentration of SO2, the greater the diffusion coefficient of SO2 in [Bmim]PF6. There is a good quadratic function relationship between the reduction peak current and SO2 concentrations in the range from 2% to 100%, which promises a kind of ionic liquid electrolyte for the detection of SO2 gas with a wide range of concentrations.

关 键 词：IONIC liquids SULFUR dioxide cyclic VOLTAMMETRY chronoamperometric 

分 类 号：O646.7[理学—物理化学]