Biodegradable polymer-modified graphene/polyaniline electrodes for supercapacitors

Htut, K. Zin; Kim, Minjae; Lee, Eunsoo; Lee, Gibaek; Baeck, Sung Hyeon; Shim, Sang Eun

doi:10.1016/j.synthmet.2017.03.005

Cited by 56 publications

(16 citation statements)

References 46 publications

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“…Figure 1(d) shows a TEM micrograph of a graphene sample. Notice that transparent corrugated layers can be observed which are typical for graphene [18].…”

Section: Methodsmentioning

confidence: 93%

UV and Visible light photodegradation of methylene blue with graphene decorated titanium dioxide

Acosta-Esparza

Rivera

Pérez-Centeno

et al. 2020

Mater. Res. Express

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Photocatalytic degradation of methylene blue by graphene decorated titanium dioxide (TiO 2 ) powders heated at different temperatures was analyzed. The powders were prepared by mixing TiO 2 with graphene prepared by the modified Hummers method. A thermal treatment was applied to mixed and pure TiO 2 powders with the aim of analyze their structural dependence on temperature, and consistently their photocatalytic degradation effect on methylene blue solutions exposed to UV and visible radiation. Structural characterization of the powders was carried out by x-ray diffraction and Raman spectroscopy. When irradiated with UV, the mixed powders showed as high as 87% photocatalytic degradation, while the pure TiO 2 reached values of 59%. For visible radiation, as it is expected, the pure TiO 2 showed no activity, while the mixture presented degradation of 40%.

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“…Figure 1(d) shows a TEM micrograph of a graphene sample. Notice that transparent corrugated layers can be observed which are typical for graphene [18].…”

Section: Methodsmentioning

confidence: 93%

UV and Visible light photodegradation of methylene blue with graphene decorated titanium dioxide

Acosta-Esparza

Rivera

Pérez-Centeno

et al. 2020

Mater. Res. Express

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“…The N 1s spectrum indicates the three different electronic states of PANI, the benzenoid amine (–NH–) with binding energy at 399.6 eV, the quinoid amine (–N=) with binding energy at 398.8 eV, and the nitrogen cationic radical (N +· ) with binding energy at 401.2 eV. 42 –45 The presence of a Cl peak indicates that PANI NWs were doped with Cl − . For C1 s XPS spectrum, the three peaks centering at 284, 285.4, and 286.5 (288.3) eV, which indicated the interaction form of C–C, C–N, and C–O(C=O).…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal synthesis of PANI nanowires for high-performance supercapacitor

Jia

et al. 2019

High Performance Polymers

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Polyaniline nanowires (PANI NWs) were synthesized under different temperatures through a facile hydrothermal method and used as electrodes for high-performance pseudocapacitor. The resulting samples were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron micrographs, thermogravimetric analysis, and X-ray photoelectron spectroscopy. Electrochemical properties of these PANI electrodes are studied by cyclic voltammetry, galvanostatic charge–discharge test, and electrochemical impedance spectroscopy in 0.5M H2SO4 aqueous solution. The highest specific capacitance is obtained on the PANI NWs synthesized under 80°C (PANI-80) with 540.0 F g−1 at current density of 0.5 A g−1 accompanied with 82% specific capacitance retention after 1000 charge discharge cycles at 5 A g−1 current density.

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“…K.Z. Htut et al [55] reported that the CV curves show two redox peaks for each oxidation and reduction process for PANI and PANI based composites, which can be assign to the conducting state (emeraldine/pernigraniline) and semiconductor state (leucoemeraldine/emeraldine) transitions of PANI. A. Alptekin et al [56] reported that CV curves of VACNT/PANI at different scan rates and found that area under the curve increases with the increasing the scan rates from 20 to 400 mV/s and oxidation peaks to be steady on the CV curve and its indicates resistance effects were not pronounced for the synthesized composite electrodes, otherwise CV curves shape from horizontal to diagonal.…”

Section: Electrochemical Analysismentioning

confidence: 99%

Electrochemical Performance of Starch-Polyaniline Nanocomposites Synthesized By Sonochemical Process Intensification

Pandi¹,

Sonawane²,

Gumfekar³

et al. 2019

Journal of Renewable Materials

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The present study deals with the intensified synthesis of starchpolyaniline (starch-PANI) nanocomposite using an ultrasound-assisted method. Starch is a key component in this nanocomposite, which acts as a backbone of the nucleation of PANI. The Electrochemical property of the nanocomposite arises due to the addition of PANI. This is one of green approach for the synthesis of bio nanocomposite using ultrasound. The crystallinity of the composite is evaluated using the Scherrer Formula. The starch-PANI nanocomposite was characterized by XRD, FT-IR, Raman, XPS and TEM. The composite nanoparticles show spherical morphology. The elemental composition of starch-PANI showed O 1s peak at 546 eV, N 1s peak at 416 eV, C 1s peak at 286 eV and S 1s peak at 176 eV. The electrochemical studies of the starch-PANI electrodes are evaluated by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). Starch-PANI electrode has shown the maximum specific capacitance of 499.5 F/g at 5 mV/s scan rate.

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Biodegradable polymer-modified graphene/polyaniline electrodes for supercapacitors

Cited by 56 publications

References 46 publications

UV and Visible light photodegradation of methylene blue with graphene decorated titanium dioxide

UV and Visible light photodegradation of methylene blue with graphene decorated titanium dioxide

Hydrothermal synthesis of PANI nanowires for high-performance supercapacitor

Electrochemical Performance of Starch-Polyaniline Nanocomposites Synthesized By Sonochemical Process Intensification

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