Producción Científica Profesorado

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Doped Polypyrrole



Alvarez Romero, Giaan Arturo

2011

Licona-Sánchez T. J., Álvarez-Romero G. A., Palomar-Pardavé M.,Galán-Vidal C. A., Páez-Hernández M. E., Ramírez Silva M. T., Romero-Romo M., Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Doped Polypyrrole, International Journal of Electrochemical Science, Vol. 6, ISSN 1452-3981


Abstract


In this work, polypyrrole films were electrosynthesized from aqueous media onto a graphite-epoxy resin composite electrode (GCE) using sulphate ions as dopant. Potentiostatic electrosynthesis studies were done using different salts as SO4-2 source, namely: Na2SO4, Li2SO4, (NH4)2SO4 and K2SO4. The potentiometric response of the diverse Ppy-SO4-2 films was evaluated by means of calibration plots; according to the slope sign the behavior of the different films can be classified in three responses: anionic, cationic and anionic-cationic. Such behaviors were observed for all synthesized films, independently of the sulphate salt used. When analyzing the current transients obtained for the different salts, similarities were found for those with the same potentiometric behavior, but significant differences were observed when comparing transients of different potentiometric responses. From the analysis of the experimental current transients it was determined that the nature of the cation of the sulphate salt influences the number density of active sites on the electrode surface where the Ppy-SO4-2 is deposited. Moreover, the kind of Ppy-SO4-2 potentiometric response also depends on the type of cation used during the polymer electrochemical synthesis. According to the results obtained, some boundaries for the potentiostatic synthesis parameters are suggested to induce a specific potentiometric response.



Producto de Investigación UAEH




Artículos relacionados

Potentiometric behavior of graphite-epoxy electrochemical transducers towards anions, cations and pH...

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...

Simultaneous determination of tetracyclines in poultry muscle by capillary zone electrophoresis

Multicommutated Anodic Stripping Voltammetry at Tubular Bismuth Film Electrode for Lead Determinatio...

Determination of oxytetracycline in milk samples by polymer inclusion membrane separation coupled to...

cis-Palladium(II) complexes of derivatives of di-(2-pyridyl)methane: Study of the influence of the b...

Design and Construction of Solid State Ag/AgCl Reference Electrodes Through Electrochemical Depositi...

Kinetics of Polypyrrole Films Doped with Sulphate Ions Electrodeposited Over Graphite - Epoxy Resin ...

Validation of a tubular bismuth film amperometric detector: Determination of diclofenac sodium by mu...

Presence and antimicrobial resistance of Escherichia coli isolated from foodstuffs in Hidalgo State ...