Enhanced morphology, crystallinity and conductivity of poly (3,4-ethyldioxythiophene)/ErGO composite films by in situ reduction of TrGO partially reduced on PEDOT modified electrode

L. A. Hernández, G. Riveros, F. Martín, D. M. González, M. C. Lopez, M. León

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this work, novel composites obtained by electrochemical reduction of graphene oxide (ErGO)/poly(3,4-ethylenedioxythiophene), PEDOT, have been prepared by partially reduced (TrGO) graphene oxide reduction inside the polymer. Composites were characterized using different techniques namely, RAMAN, XRD, FESEM, HR-TEM and XPS. The results showed that the conductivity of PEDOT/ErGO significantly improves on TrGO reduction. In fact, doping-undoping process increased 10-fold and the electrochemical response showed a 2-fold increase as compared with PEDOT and PEDOT/TrGO. RAMAN, XRD and XPS allowed corroborating that C[sbnd]O bonds disappeared in PEDOT/ErGO composites suggesting a partial removal of oxygen-containing groups. FESEM and HR-TEM images exhibited a uniform and porous structure of the PEDOT/ErGO composite. On the other hand, the reduction of TrGO, improves the composite specific surface area. As a result, the PEDOT/ErGO composite presents much higher electrochemical response in comparison with PEDOT and PEDOT/TrGO. The electrochemical properties put them into a promising position as a potential material for energy storage devices, e.g. super capacitors, batteries and biosensors, due to the permeable film with defined pore sizes that PEDOT/ErGO showed.

Original languageEnglish
Pages (from-to)155-162
Number of pages8
JournalElectrochimica Acta
Volume240
DOIs
StatePublished - 20 Jun 2017
Externally publishedYes

Keywords

  • conducting polymers
  • electrosynthesis
  • ErGO
  • PEDOT
  • TrGO

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