Role of Plasma Parameters on the Conjugated Structure Retention in Polyaniline Thin Film

Hussain, Amreen A.; Sharma, Shyamalima; Pal, Arup R.; Bailung, Heremba; Chutia, Joyanti; Patil, D.S.

doi:10.1007/s11090-012-9381-0

Cited by 14 publications

(7 citation statements)

References 26 publications

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“…A summary of the analysis of absorption bands is provided in Table , including their assignments based on Refs. .…”

Section: Resultsmentioning

confidence: 99%

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Xiong

et al. 2014

J of Applied Polymer Sci

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Polyaniline (PANI) with high crystallinity degree was facilely synthesized on the surface of stainless steel net by galvanostatic method. The effect of polymerization current density on the characteristics of morphology and structure had been investigated by field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). FE-SEM observations disclosed that PANI was deposited as nanofibers and their diameters decreased with the polymerization current density. FTIR studies revealed that degree of oxidation increased in order PANI-2 < PANI-6 < PANI-10. XPS measurements displayed that PANI polymerized at 6 mA cm 22 (PANI-6) exhibited much higher doping level of 77.8%, which favored the conductivity. XRD analysis discovered that the obtained PANI showed high crystallinity degree in which PANI-6 possessed highest crystallinity degree (X cr ) up to 67%. Electrochemical performances of PANI as electrode materials were studied via cyclic voltammetry. The results presented that PANI-6 possessed greater discharge capacity and better reversibility.In this study, PANI with high crystallinity degree was synthesized by galvanostatic method on the basis of several points of view: the production is purer and more homogeneous, the devices are facile, and different thickness films could be obtained by controlling polymerization time and/or current density. The data about its spectral properties, structure, conductivity, and electrochemical properties were presented. The effect of polymerization current density on the structure, degree of oxidation (DO), doping level (DL), and crystallinity degree was investigated. The relationship between structure and electric properties was discussed. EXPERIMENTAL ReagentsAniline (C 6 H 7 N, analytical grade from Xi'an Chemical Industry, China) was distilled under reduced pressure before use.

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“…A summary of the analysis of absorption bands is provided in Table , including their assignments based on Refs. .…”

Section: Resultsmentioning

confidence: 99%

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Xiong

et al. 2014

J of Applied Polymer Sci

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“…This clearly shows the presence of sulphonic groups in SAO. The peaks at 1406 and 3025 cm −1 correspond to the symmetrical stretching of phenazine heterocyclic rings and C-H aromatic stretching vibrations, respectively [ 35 , 42 ]. The XRD diffractogram of SAO ( Figure 1 B) shows an intense peak at 2θ = 6.4°, which is the characteristic peak for periodically aligned lamella of SAO chains [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

A Unique Synthesis of Macroporous N-Doped Carbon Composite Catalyst for Oxygen Reduction Reaction

et al. 2020

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Macroporous carbon materials (MCMs) are used extensively for many electrocatalytic applications, particularly as catalysts for oxygen reduction reactions (ORRs)—for example, in fuel cells. However, complex processes are currently required for synthesis of MCMs. We present a rapid and facile synthetic approach to produce tailored MCMs efficiently via pyrolysis of sulfonated aniline oligomers (SAOs). Thermal decomposition of SAO releases SO2 gas which acts as a blowing agent to form the macroporous structures. This process was used to synthesise three specifically tailored nitrogen (N)-doped MCM catalysts: N-SAO, N-SAO (phenol formaldehyde) (PF) and N-SAO-reduced graphene oxide (rGO). Analysis using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) analysis confirmed the formation of macropores (100–350 µm). Investigation of ORR efficacy showed that N-SAOPF performed with the highest onset potential of 0.98 V (vs. RHE) and N-SAOrGO showed the highest limiting current density of 7.89 mAcm−2. The macroporous structure and ORR efficacy of the MCM catalysts synthesised using this novel process suggest that this method can be used to streamline MCM production while enabling the formation of composite materials that can be tailored for greater efficiency in many applications.

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“…The FTIR spectrum (Perkin Elmer, Waltham, MA, USA) of aniline oligomers ( Figure 3 B) shows intense peaks at 3025, 3195, 1414, 1046, and 609 cm −1 . The peaks at 3025 and 3195 cm −1 were ascribed to the C–H aromatic stretching vibration [ 31 ] and to hydrogen bonded N–H stretching of aniline oligomers, respectively [ 25 ]. The peak at 3195 cm −1 could also arise from the –OH groups from –SO 3 H [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

A Facile Synthesis Procedure for Sulfonated Aniline Oligomers with Distinct Microstructures

et al. 2018

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Well-defined sulfonated aniline oligomer (SAO) microstructures with rod and flake morphologies were successfully synthesized using an aniline and oxidant with a molar ratio of 10:1 in ethanol and acidic conditions (pH 4.8). The synthesized oligomers showed excellent dispersibility and assembled as well-defined structures in contrast to the shapeless aggregated material produced in a water medium. The synergistic effects among the monomer concentration, oxidant concentration, pH, and reaction medium are shown to be controlling parameters to generate SAO microstructures with distinct morphologies, whether micro sheets or micro rods.

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Role of Plasma Parameters on the Conjugated Structure Retention in Polyaniline Thin Film

Cited by 14 publications

References 26 publications

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

A Unique Synthesis of Macroporous N-Doped Carbon Composite Catalyst for Oxygen Reduction Reaction

A Facile Synthesis Procedure for Sulfonated Aniline Oligomers with Distinct Microstructures

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