Synthesis and characterization of polypyrrole-magnetite-vitamin B12 hybrid composite electrodes

Csaba Janaky, Balazs Endrodi, Angela Hajdu, C. Visy

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this study vitamin B12 covered magnetite nanoparticles have been incorporated into a conducting polypyrrole. This polymer was electrochemically synthesized in the presence of the B12-coated magnetite. The adsorption of B12 was demonstrated by the decrease in absorbance of the vitamin in the supernatant liquid after B12 has been in contact with magnetite sol overnight. The composition of the layers was studied by the electrochemical quartz crystal microbalance technique during the polymerization. The slope of the mass change-charge curves indicate the incorporation of 27 m/m% magnetite and 15 m/m% B12. The redox transformation of the film in monomer- and nanoparticle-free solutions was also investigated by this method and the difference in the virtual molar masses of the moving species was evidenced. The morphology and the composition of the layers were characterized by scanning electron microscopy combined with energy dispersive X-ray microanalysis measurements, which latter proved the successful incorporation of the magnetic and bio-active components. The electrochemical behavior of the films unambiguously showed the complex redox activity of the composites and the current surplus were quantified by the redox capacity of the layers. These data show the doubling of the redox capacity in case of the hybrid material compared to the neat polymer. The successful enrichment of B12 can be exploited in the recently evidenced redox mediation process performed by a PPy/B12 film.

Original languageEnglish
Pages (from-to)339-346
Number of pages8
JournalJournal of Solid State Electrochemistry
Volume14
Issue number2
DOIs
Publication statusPublished - Feb 2010

Fingerprint

Ferrosoferric Oxide
hybrid composites
vitamins
Vitamins
polypyrroles
Polypyrroles
Magnetite
Vitamin B 12
magnetite
Electrodes
electrodes
Composite materials
synthesis
Polymers
Magnetite Nanoparticles
Magnetite nanoparticles
nanoparticles
mediation
Molar mass
Quartz crystal microbalances

Keywords

  • Bio-nanocomposite
  • Conducting polymer
  • Magnetite
  • Polypyrrole
  • Vitamin B12

ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Synthesis and characterization of polypyrrole-magnetite-vitamin B12 hybrid composite electrodes. / Janaky, Csaba; Endrodi, Balazs; Hajdu, Angela; Visy, C.

In: Journal of Solid State Electrochemistry, Vol. 14, No. 2, 02.2010, p. 339-346.

Research output: Contribution to journalArticle

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