Figure - available from: Journal of Solid State Electrochemistry
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In this study, we report on the electrosyntheses of polyaniline (PAni) and PAni/magnetite nanoparticle (PAni/Fe3O4-NP) composite films by a potentiodynamic method from water and ethanol solutions. The aim of the study is to evaluate the effect of the solvent on the electrochemical growth of these films. The growth cyclic voltammograms and the mass...
Citations
... The low pH is obtained by using a surfactant or an acid assisted polymerization as shown in Figure 1, where Ais the dopant anion incorporated into PANI. Literature reported that incorporation of sulfonated aromatics (ptoluene sulfonic acid, benzene sulfonic acid, diphenyl phosphate, camphor sulfonic acid, dodecylbenzenesulfonic acid, dinonylnapthalene sulfonic acid etc.) as dopant anions in PANI turned it into more conductive, easily processable, soluble, and thermally stable emeraldine salt [1,[4][5][9][10][11]. The post-processed coating of PANI is investigated by various electrochemical techniques for numerous analytical applications using a variety of electrolytes. ...
... Such broadness in the peaks represents difficult charge transfer in the CV process. These type of CVs are also observed in the weak acid solution like in H [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The CV curves exhibit that the prepared PANI retained a reversible and electroactive nature in neutral media. This might be caused by the incorporation of dopants i.e. ...
Cite This Article: Begum, B.; Ali Shah, A.-H.; Bilal, S.; Tunable electronchemical activity of polyaniline salt by doping anion exchange. Mat Int 2020, 1, 0054-0061. https://doi. Abstract: The exchange of mobile anion of chemically synthesized polyaniline with counter anions of electrolyte solutions is studied by using cyclic voltammetry (CV). The synthesized polyaniline (PANI) doped with sulfuric acid (H 2 SO 4) and dodecyl benzenesulfonic acid (DBSA) is soluble in a wide range of organic solvents which makes it appealing for further processability. The exchange of dopant anions (of H 2 SO 4 and DBSA) with a variety of counter anion has been inspected by electrochemical cycling in aqueous sodium sulfate (Na 2 SO 4), sodium perchlorate (NaClO 4), and sodium hydroxide (NaOH) solution. The CV measurements have revealed that PANI remains redox active at higher scan rate and there is exchange of dopant anion with SO 4 2-and ClO 4 1-of electrolytes. In NaOH solution, the emeraldine salt form of PANI is transformed into emeraldine base due to deintercalation of the anion form polymer matrix. The results indicate a significant change in electrochemical conductance and behavior of PANI in each electrolyte. Furthermore, the polymer film displayed a high specific capacitance value of 588 F/g in 1.0 M NaClO 4 solution in the optimized potential window of-0.2 V to 0.9 V at 20 mV/s.
