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

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Sequential Injection Spectrophotometric Determination of Diclofenac in Urine and Pharmaceutical Form...

Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS

Potentiometric quantification of saccharin by using a selective membrane formed by pyrrole electropo...

Synthesis, characterization, and crystal structures of n-alkyldiorganodithiophosphates RS2P(OC6H4)2

Potentiometric Behavior of Diverse Polypyrrolesulphate Films Electro Synthesized on Graphite Epoxy ...

Evaluación del contenido de metales y su efecto en la estabilidad de antocianinas

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

Determination of primary amino acids in wines by high performance liquid magneto-chromatography

Facilitated transport of Hg(II) through novel activated composite membranes