Wuhan University Journal of Natural Sciences

, Volume 24, Issue 5, pp 400–404 | Cite as

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

  • Qing Huang
  • Yang Hu
  • Jiakai Wang
  • Kai Jiang
  • Tian WuEmail author
Chemistry and Physics


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.

Key words

ionic liquids sulfur dioxide cyclic voltammetry chronoamperometric 

CLC number

O 646.7 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Wasserscheid P, Welton T. Ionic Liquids in Synthesis [M]. Weinheim: Wiley-VCH, 2002.CrossRefGoogle Scholar
  2. [2]
    Armand M, Endres F, Macfarlane D R, et al. Ionic-liquid materials for the electrochemical challenges of the future [J]. Nature Materials, 2009, 8(8): 621–629.CrossRefGoogle Scholar
  3. [3]
    Buzzeo M C, Hardacre C, Compton R G. Use of room temperature ionic liquids in gas sensor design [J]. Analytical Chemistry, 2004, 76(15): 4583–4588.CrossRefGoogle Scholar
  4. [4]
    Huang Q, Li W, Wu T, et al. Monoethanolamine-enabled electrochemical detection of H2S in a hydroxyl-functionalized ionic liquid [J]. Electrochemistry Communications, 2018, 88: 93–96.CrossRefGoogle Scholar
  5. [5]
    Huang Q, Li Y, Jin X B, et al. Chloride ion enhanced thermal stability of carbon dioxide captured by monoethanolamine in hydroxyl imidazolium based ionic liquids [J]. Energy & Environmental Science, 2011, 4(6): 2125–2133.CrossRefGoogle Scholar
  6. [6]
    Sun H J, Yu L P, Jin X B, et al. Unusual anodic behaviour of chloride ion in 1-butyl-3methylimidazolium hexafluorophosphate [J]. Electrochemistry Communications, 2005, 7(7): 685–691.CrossRefGoogle Scholar
  7. [7]
    Wang R, Hoyano S, Ohsaka T. O2 gas sensor using supported hydrophobic room-temperature ionic liquid membrane-coated electrode [J]. Chemistry Letters, 2004, 33(1): 6–7.CrossRefGoogle Scholar
  8. [8]
    Dyson P J, Laurenczy G, Ohlin C A, et al. Determination of hydrogen concentration in ionic liquid and the effect (or lack of) on rates of hydrogenation [J]. Chemical Communications, 2003, 19: 2418–2419.CrossRefGoogle Scholar
  9. [9]
    Broder T L, Silvester D S, Aldous L, et al. Electrochemical oxidation of nitrite and the oxidation and reduction of NO2 in the room temperature ionic liquid [C2mim][NTf2] [J]. The Journal of Physical Chemistry B, 2007, 111(27): 7778–7785.CrossRefGoogle Scholar
  10. [10]
    Buzzeo M C, Giovanelli D, Lawrence N S, et al. Elucidation of the electrochemical oxidation pathway of ammonia in dimethylformamide and the room temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [J]. Electroanalysis, 2004, 16(11): 888–896.CrossRefGoogle Scholar
  11. [11]
    Barrosse A L E, Silvester D S, Aldous L, et al. Electroreduction of sulfur dioxide in some room-temperature ionic liquids [J]. The Journal of Physical Chemistry C, 2008, 112(9): 3398–3404.CrossRefGoogle Scholar
  12. [12]
    Potteau E, Levillain E, Lelieur J P. Mechanism of the electrochemical reduction of sulfur dioxide in non-aqueous solvents [J]. Journal of Electroanalytical Chemistry, 1999, 476 (1): 15–25.CrossRefGoogle Scholar
  13. [13]
    Bruno P, Caselli M, Traini A. Study of sulfur dioxide reduction mechanism in dimethyl sulfoxide [J]. Journal of Electroanalytical Chemistry, 1980, 113(1): 99–111.CrossRefGoogle Scholar
  14. [14]
    Martin R P, Sawyer D T. Electrochemical reduction of sulfur dioxide in dimethylformamide [J]. Inorganic Chemistry, 1972, 11(11): 2644–2647.CrossRefGoogle Scholar
  15. [15]
    Winlove C P, Parker K H, Oxenham R K C. The measurement of oxygen diffusivity and concentration by chronoamperometry using microelectrodes [J]. Journal of Electroanalytical Chemistry, 1984, 170(1–2): 293–304.CrossRefGoogle Scholar
  16. [16]
    Bard A J, Faulkner L R. Electrochemical Methods: Fundamentals and Applications [M]. 2nd Ed. New York: John Wily & Sons, 2001.Google Scholar

Copyright information

© Wuhan University and Springer-Verlag GmbH Germany 2019

Authors and Affiliations

  • Qing Huang
    • 1
    • 2
  • Yang Hu
    • 3
  • Jiakai Wang
    • 4
  • Kai Jiang
    • 5
  • Tian Wu
    • 1
    • 2
    Email author
  1. 1.College of Chemistry and Life ScienceHubei University of EducationWuhan, HubeiChina
  2. 2.Institute of Materials Research and Engineering (IMRE)Hubei University of EducationWuhan, HubeiChina
  3. 3.College of Chemistry and Molecular SciencesWuhan UniversityWuhan, HubeiChina
  4. 4.School of Materials Science and EngineeringHubei UniversityWuhan, HubeiChina
  5. 5.School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan, HubeiChina

Personalised recommendations