Electrodeposition and Characterisation of Copolymers Based on Pyrrole and 3,4-Ethylenedioxythiophene in BMIM BF4 Using a Microcell Configuration

Abstract

a b s t r a c tElectrochemical copolymerization of pyrrole (Py) and 3,4-ethylenedioxythiophene (EDOT) was performed in an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, (BMIM BF4) employing a 'micro-cell' in order to use the materials efficiently. Characterization of the copolymers formed on an ITO substrate was performed for different Py: EDOT ratios (1:2, 1:1, 2:1) in both aqueous and ionic liquid electrolytes. The three copolymers displayed different absorbance spectra with max of the polaron species at 507, 540 and 580 nm for PPy-co-PEDOT ratios of 1:2, 1:1, 2:1, respectively. Electrochemical and spectroelectrochemical analysis revealed that the properties of the copolymer depend upon the Py/EDOT monomer ratio used. The copolymer PPy-co-PEDOT (2:1) displayed good stability, a switching time of 20 s and a colouration efficiency of 101.3 C-1cm2. The presence of Py in the copolymer stabilised the polaron state of the copolymer and allowed greater ion mobility compared to the PEDOT alone.

Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor

“…Additionally, electrodepositing nanoAu and RGO onto the electrode surface using cyclic voltammetry has also been reported [15,30,31]. Within the electrodeposition process, PPy can be over-oxidized at high positive anodic potential to produce overoxidized PPy, which will decrease the conductivity and adherence at the electrode surface [13,32]. In this context, the co-electrodepositon of pyrrole, graphene oxide, and auric ions (Au 3+ ) was performed by cyclic voltammetry in the potential ranging from −1.5 V to 0.8 V vs. a saturated calomel electrode (SCE) with a scan rate of 25 mV/s in HAuCl 4 ·4H 2 O aqueous solution for 10 cycles, as shown in Figure 2.…”

Efficient Electrochromic Materials Based on PEDOT/WO3 Composites Synthesized in Ionic Liquid Media

“…The difference in the film morphologies is consistent with the significant differences in the electrochemical properties of the three composites. 39, 41.…”

Synthesis, characterizations, and electrochromic properties of donor–acceptor type polymers containing 2, 1, 3‐benzothiadiazole and different thiophene donors

“…38 With the CV scanning process continued, the peak current of these redox system increase regularly, demonstrating the successful deposition of electroactive polymer films on the working electrode surface. 39 In comparison with other two monomers, the high current intensity can be associated to the lower oxidation potential and high applied polymerization potential of the BTh-HT-Tz monomer, allowing the electrodeposition of a larger amount of the polymer. After formation of polymer films on the working electrode, the prepared films are rinsed with clean ACN and dried at 408 C in vacuum for 24 h for CV, SEM, AFM and spectroelectrochemical characterizations.…”