The Effect of a Small Amount of Water on the Structure and Electrochemical Properties of Solid-State Synthesized Polyaniline

Shao, Weiwei; Jamal, Ruxangul; Xu, Feng; Ubul, Aminam; Abdiryim, Tursun

doi:10.3390/ma5101811

Cited by 140 publications

(66 citation statements)

References 49 publications

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“…b, confirming the formation of conducting PANI. The peaks observed near 1,230 and 1,284 cm −1 can be assigned to the occurrence of bipolaron structure and π–electron delocalization in the PANI . When compared with PANI, from Fig.…”

Section: Resultsmentioning

confidence: 88%

“…b), three peaks can be observed at 12.69° (100), 19.08° (110), and 24.03° (111), indicating the crystalline behavior of the polymer. The peak position at 19.08 and 24.03° corresponds to periodicity in the parallel and perpendicular direction of the polymer chains respectively . When compared with PANI, for PANI/GO 1 (Fig…”

Section: Resultsmentioning

confidence: 94%

“…The absence of the peak at 1,720 cm −1 in all nanocomposites clearly indicates the presence of more of imine units than amine units in the PANI chains . The presence of bipolaron structure, π–electron delocalization, quinoid, and benzenoid peaks in all nanocomposites indicates the successful formation of nanocomposites of PANI with GO . The effect of GO on oxidation of aniline was determined by the degree of oxidation (x), which is calculated as the ratio of intensity of quinoid peak (IQ) to the intensity of benzenoid peak (IB), given by the following equation: .…”

Section: Resultsmentioning

confidence: 99%

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Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

et al. 2019

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This study depicts the chemical synthesis and supercapacitive behavior of nanocomposites of Polyaniline nanorods wrap with graphene oxide (PANI/GO). Synthesis of PANI/GO nanocomposites was carried out by in situ oxidative solution polymerization of aniline in the presence of Nitric acid, acting as a proton donor. The nanocomposites were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, X‐ray diffraction, Raman spectroscopy, thermal gravimetric analysis, contact angle analysis, cyclic voltammetry, galvanostatic charge–discharge test and electrochemical impedance spectroscopy. FESEM revealed the formation of PANI nanorods with the aspect ratio in the range of 3–5, while TEM revealed the wrapping of GO sheets on the PANI nanorods. Thermal stability showed decreasing trend while surface hydrophobicity was of increasing trend with GO concentration due to partial reduction of GO, as observed in Raman spectra. PANI/10 wt% GO (PANI/GO10) nanocomposite electrode showed highest specific capacitance of 276 F/g as compared with 180 F/g of Pure PANI. Cyclic stability of 80% was retained for PANI/GO10 nanocomposites after 500 cycles at a current density of 0.5A/g as compared with unstable PANI. The enhanced specific capacitance and good cyclic stability with increasing GO concentration revealed the good potential of PANI/GO nanocomposites for supercapacitor applications. POLYM. COMPOS., 40:E1716–E1724, 2019. © 2019 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

et al. 2019

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“…The FTIR responses of PAni before and after immersion in (50 ppm) chloroform solutions showed similar trend that can be determined by using the intensity ratio (I Q /I B ) as stated in Equation . The I Q /I B ratio of PAni (−5, 0 and 25 °C) before and after immersion in chloroform solution (50 ppm) are as tabulated in Table

I n t e n s i t y r a t i o = {normalI}_{normalQ} / {normalI}_{normalB}

where I Q = intensity of quinoid after immersion, I B = intensity of benzenoid after immersion.…”

Section: Resultsmentioning

confidence: 95%

Effect of Polymerization Temperatures on Polyaniline Coated Fiber Bragg Grating Sensor for Chloroform Detection

Ahad

Harun

Gan

et al. 2018

Macromolecular Symposia

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A new fiber Bragg grating (FBG) sensor based on polyaniline (PAni) has been developed for chloroform detection. PAni was synthesized through chemical oxidation method by using equimolar amount of aniline monomer (Ani), dioctyl sodium sulfosuccinate dopant (AOT) at different three polymerization temperatures (−5, 0 and 25 °C). The chemical structure and conducting behavior of PAni were confirmed using Fourier transform infrared (FTIR) spectroscopy, ultraviolet‐visible (UV‐vis) spectroscopy and conductivity measurements. In this study, the FBG sensor was produced by removing the cladding layer and replaced with PAni coating. The immersion of sensor in varying concentration of chloroform (from 10 to 100 ppm) produced different Bragg wavelength shift at ∼1557 nm in the optical spectrum analyzer (OSA). The effect of PAni polymerized at different polymerization temperatures affect the sensor performance. It was found that the FBG sensor coated with PAni polymerized at 0 °C exhibited the highest sensitivity for chloroform detection and good recyclability up to 10 cycles with fast response time of 7 s and recovery time of 8 s. The FTIR, UV‐vis and conductivity analyses supported the proposed mechanism for the interaction between PAni and chloroform being the dipole‐dipole interaction (physical interaction) between the partial negative charge (Clδ−) of chloroform and the partial positive charge (NHδ+) of PAni.

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“…ABP composites show the highest oxidation ratio, which indicates the presence of more emeraldine salt form. These results are mainly related to the oxidant and amount of H þ in the medium [37]. Since solid-based polymerization is a solventless method, the probability of contact between oxidant and monomer is low.…”

Section: Characterizationmentioning

confidence: 96%

Optimization of multiroute synthesis for polyaniline-barium ferrite composites

Ghzaiel

Dhaoui

Pasko

et al. 2016

Materials Chemistry and Physics

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International audienceA comparative study of physicochemical and magnetic properties of Polyaniline-BaFe12O19 composites prepared by Solid-Based Polymerization (SBP) and by Aqueous-Based Polymerization (ABP) is carried out. The composites obtained by the latter method underwent a grinding to study the influence of shear stress. Thus, in a systematic approach, an investigation of stirring effect was done by synthesizing these composites using aqueous-based polymerization but without mechanical stirring. Different mass ratio of BaFe12O19 was used to explore their impact on composites properties. X-ray diffraction, FTIR, SEM, TGA, conductivity and vibrating sample magnetometer measurements were performed. Structural andmorphological investigations confirmed the presence of polyaniline and barium hexaferrite phase, which were in interaction in the composites regardless the polymerization route. The powder obtained by solid-based pathway revealed distinct particles with uniform distribution for various compositions (wt.%) of BaFe12O19 in Pani, while the composites obtained by aqueous-based polymerization presented agglomerated nanostructures. Thermogravimetric analysis exhibited an improved thermal stability for Pani-BaFe 12O19 obtained by solid-based route. The electric conductivity has displayed decreasing trend of DC conductivity with the increase of BaFe12O19 particles in the polymer matrix. Magnetic studies showed a ferromagnetic behaviour for all composites. The saturation magnetization monotonously increased with the increasing of BaFe12O19 amount. The magnetic properties of the powders were mainly related to the hexaferrite loading which was determined using measured magnetic data. These results revealed that magnetization saturation was dependent of volume fraction of ferrite in the composites which wassignificantly affected by the reaction medium and mechanical stirring. The powders obtained by solid-based polymerization manifested enhanced magnetic characteristics. The solventless reaction medium contributed to the increase of volume fraction of ferrite in the composite compared to the aqueous reaction medium. Moreover, the mechanical stirring during aqueous-based polymerization had an important influence on the volume fraction of ferrite since it prevented the dissolution of BaFe12O19 particles

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The Effect of a Small Amount of Water on the Structure and Electrochemical Properties of Solid-State Synthesized Polyaniline

Cited by 140 publications

References 49 publications

Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

Effect of Polymerization Temperatures on Polyaniline Coated Fiber Bragg Grating Sensor for Chloroform Detection

Optimization of multiroute synthesis for polyaniline-barium ferrite composites

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