Nanocomposite Films Obtained by Electrochemical Codeposition of Conducting Polymers and Carbon Nanotubes

Abstract

The electrochemical growth of carbon nanotubes (CNTs) -conducting polymer composites offers the ability to produce three-dimensional nanostructured films that combine the redox pseudo-capacitive charge storage mechanism of conducting polymers with the high surface area and conductivity of CNTs [1 -3]. In this paper we report the electropolymerization and characterization of polypyrrole films (PPy) doped with poly (m-aminobenzenesulfonic acid) (PABS) functionalized single-walled carbon nanotubes (SWCNTs) (PPy/CNTs). The negatively charged CNTs served as anionic dopant during the electropolymerization to synthesize PPy/CNTs composite films. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and scanning electron microscopy (SEM) were used to investigate the electrochemical properties of the composite films.

Electrochemical reduction of aryl diazonium salts: a versatile way for carbon nanotubes functionalisation

“…The voltammetric signal of the nitrophenyl group in 0.1 M TBATFB in ACN can be observed at a rather low cathodic potential (approximately À1.5 V), nitrobenzene being reversibly reduced by one electron to its stable radical anion. [16,17] On repetitive scans, this reversible wave gradually decreases because of the protonation of the radical anion of the p-nitrophenyl group by residual water. In the case of grafting at SWCNTs electrodes, the reversibility could not be evidenced at these cathodic potentials when transferring to a pure electrolyte solution.…”

“…[16,17] The selected molecules used for SWCNTs functionalisation were chosen both for the opposite electronic effects of the aryl substituents and their electroactivity after grafting. We observed that electrochemistry can be an advantageous technique for qualitative analysis of grafting on SWCNTs, the functionalisation of SWCNTs with electroactive groups (i.e.…”

“…p-nitrophenyl diazonium tetrafluoroborate (1), p-N-phenylaniline diazonium tetrafluoroborate (2), p-tolyl diazonium tetrafluoroborate (3) and p-flourophenyl diazonium tetrafluoroborate (4) were prepared by standard diazotation of the corresponding amines with NaNO 2 in acidic medium as described in our previous studies. [16] Transmission electron microscopy (TEM) was also performed to analyse the structure of the functionalised nanotubes. A Phillips CM-10 microscope working at 100 kV was used for these measurements.…”

Application of Glassy Carbon Electrode Modified with a Bilayer of Multiwalled Carbon Nanotube and Polypyrrole Doped with Nitrazine Yellow for Voltammetric Determination of Naltrexone

“…These composite materials have distinct, complementary properties of the individual components with a synergistic effect [45]. Combination of CPs and CNTs produces a new composite material with improved electrochemical and mechanical properties that were not observed in the individual components [46].…”

“…One is the electropolymerization of a polymer film on electrode surfaces already modified by the adsorbed CNT coatings [31][32][33]47]. The other is to dissolve the monomer in a suspension of CNTs, and then co-deposit the polymer with the CNTs into a composite coating on the electrode surface [45,48,49].…”