Effect of Acid Blue dyes on the electrochemical capacitance of polypyrrole

Tumacder, Doebner Von; Morávková, Zuzana; Konefał, Magdalena; Salapare, Hernando S.; Guittard, Frédéric; Bober, Patrycja

doi:10.1016/j.materresbull.2023.112455

Cited by 2 publications

(3 citation statements)

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“…Typical bands of AB dye molecule at 1407 cm −1 , 1364 cm −1 , 1325 cm −1 , and 1267 cm −1 are related to C=C and C-N stretching vibrations. Other peaks refer to the deformation vibrations of AB molecules located at 1158 cm −1 , 1037 cm −1 , 924 cm −1 , and 510 cm −1 [45]. In addition, the small shoulder appearing at 1596 cm −1 in the PPy-AB spectrum belongs to C=C stretching in the bipolaron structure, which indicates a higher protonation state of PPy in the presence of the dye.…”

Section: Spectroscopy Studymentioning

confidence: 98%

“…It was discussed that neat PPy polymerized in frozen-state conditions (−24 • C) has better conductivity (24 S cm −1 ) compared to PPy synthesized at room temperature (5 S cm −1 ) [36]. Moreover, organic dyes (such as methyl red [37], safranin [38,39], methyl orange (MO) [40][41][42], Acid Blue 25 (AB) [43][44][45], etc.) were studied in various ways as templates or additives during the chemical or electrochemical polymerization of pyrrole and yielded improved PPy conductivity and electroactivity.…”

Section: Introductionmentioning

confidence: 99%

“…AB and MO organic dyes were used as structural directing agents, which is based on different mechanisms. They can create hard templates that direct the morphology of PPy into 1D nanostructures [41,43,[45][46][47]. When PPy was polymerized in frozen-state conditions (−24 • C) with organic dyes present, its conductivity was further enhanced, reaching 109 S cm −1 for PPy with MO and 150 S cm −1 for PPy with AB [36].…”

Section: Introductionmentioning

confidence: 99%

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Highly Electroactive Frozen-State Polymerized Polypyrrole Nanostructures for Flexible Supercapacitors

Tumacder,

Minisy,

Taboubi

et al. 2023

Polymers

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The polymerization of pyrrole in the frozen state with the presence of organic dyes (methyl orange (MO) and Acid Blue 25 (AB)) has proven to produce polypyrrole (PPy) nanostructures. Herein, we explore the electrochemical properties of PPy prepared under frozen-state conditions (−24 °C) with and without the presence of organic dyes. The electroactivity of PPy prepared with MO and AB significantly increased in all electrolytic media with a capacitance higher than this of the PPy prepared at room temperature. The highest capacitance (1914 F g−1) was obtained for PPy-MO in 0.2 M HCl solution. The impedance spectra of PPy showed a decrease in charge transfer resistance when the dyes were present. This indicates a conductivity increase of PPy. Improved electrochemical stability was observed for PPy, PPy-MO, and PPy-AB prepared at −24 °C, wherein a steady gain of capacitance was maintained during 5000 potential cycling. In addition, a PPy-based supercapacitor device was fabricated to demonstrate the energy storage characteristics of PPy, where it showed good capacitive behavior and stability. Overall, frozen-state polymerized PPy posed an impressive capacitive performance for flexible supercapacitors.

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Section: Spectroscopy Studymentioning

confidence: 98%