Irregular response of the polypyrrole films to H2S

Emese Kriván, C. Visy, Róbert Dobay, G. Harsányi, O. Berkesi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The immobilization of surfactant anions (e.g., dodecylsulfate, DS) in PPy films leads to stable, well conducting polymer films, and the film shows sensitivity to several kinds of gases and vapors. According to the generally accepted interpretation in the literature, the pattern of the interaction between the films and gases basically depends on the electron donor or acceptor behavior of gases. This concept proved to be a suitable explanation in case of NH3, where both the spectra and the conductance changed as upon a partial electrochemical reduction. However, we observed discrepancy, when PPy/DS films were exposed to H2S. Upon exposure of the film to H2S the conductance has increased significantly, although UV-vis spectra changed according to a reductive effect. The effect of different vapors was studied by spectrophotometric, AC conductance/resistance and FTIR measuring techniques. The results are explained by the consideration of the mobility of different charge carriers, by taking proton exchange processes also into account.

Original languageEnglish
Pages (from-to)1195-1200
Number of pages6
JournalElectroanalysis
Volume12
Issue number15
DOIs
Publication statusPublished - 2000

Fingerprint

Polypyrroles
Gases
Vapors
Conducting polymers
Charge carriers
Polymer films
Surface-Active Agents
Anions
Protons
Ion exchange
Surface active agents
Negative ions
polypyrrole
Electrons

Keywords

  • Conductance
  • HS
  • Polypyrrole
  • Sensor
  • UV-vis

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Irregular response of the polypyrrole films to H2S. / Kriván, Emese; Visy, C.; Dobay, Róbert; Harsányi, G.; Berkesi, O.

In: Electroanalysis, Vol. 12, No. 15, 2000, p. 1195-1200.

Research output: Contribution to journalArticle

Kriván, Emese ; Visy, C. ; Dobay, Róbert ; Harsányi, G. ; Berkesi, O. / Irregular response of the polypyrrole films to H2S. In: Electroanalysis. 2000 ; Vol. 12, No. 15. pp. 1195-1200.
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