Graphene oxide-polyaniline nanocomposites for high performance supercapacitor and their optical, electrical and electrochemical properties

Konwer, Surajit

doi:10.1007/s10854-016-4273-3

Cited by 25 publications

(14 citation statements)

References 38 publications

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“…The relative intensity of the D and G band (ID/IG), which is an estimation of the disorder level in graphene, exhibits a non monotonic behavior. The 2D band is found at around 2697 cm -1 which is in reference with the reported result for the single layer graphene within the experimental accuracy [8].…”

Section: Resultssupporting

confidence: 90%

“…Raman spectroscopy is a non-destructive technique in use to study structural change and disorder of graphite, GO, and rGO during the oxidation and reduction steps [7,8]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The peak near 1700 cm -1 is attributed to various skeletal vibrations of C=C aromatic unoxidized graphitic domain. Other prominent signals in the GO's spectrum which have been attenuated in rGO's spectrum are 1399 cm -1 , and 1071 cm -1 originating from O-H deformation, and the C-O stretching respectively [7,8].…”

Section: Resultsmentioning

confidence: 99%

“…In this paper, reduced graphene oxide (rGO) was synthesized using sonication-assisted oxidation of graphite followed by reduction with ascorbic acid as environmentally friendly reductor [7,8]. The polyaniline was prepared via chemical polymerization of aniline in 0℃ [9].…”

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Rahmawati

Suendo

Hidayat

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Reduced graphene oxide (rGO) was synthesized using sonication-assisted oxidation of graphite followed by reduction with ascorbic acid as environmentally friendly reductor. The polyaniline was prepared via chemical polimerization of aniline in 0℃. The rGO and polyaniline were blend in three mass compotitions of 1:3, 1:1, and 4:1 to produced rGO/polyaniline nanocomposites. The rGO/polyaniline nanocomposites were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy and LCR meter. The rGO sheets as the support materials could provide more active sites for the nucleation of polyaniline, where polyaniline acts as conducting support. The rGO/polyaniline nanocomposites was deposited on synthetic graphite substrate laminated the glass substrate and applied as the counter electrode for efficient dye sensitized solar cells (DSSC). The rGO/polyaniline nanocomposite is an efficient counter electrode because of Pt/TCO free. The usage of rGO/polyaniline nanocomposites film as counter electrode in DSSC was demonstrated. The best performance was obtained for rGO/Polyaniline ratio of 4:1. Here, the optimum short circuit current density (Jsc), the open circuit current (Voc), the fill factor (FF), and the overall conversion efficiency under AM 1.5, 100 mW cm −2 illumination are 7.853 mA/cm 2 , 0.64 Volt, 47.2% and 2.64%, respectively.

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Section: Resultssupporting

confidence: 90%

“…Raman spectroscopy is a non-destructive technique in use to study structural change and disorder of graphite, GO, and rGO during the oxidation and reduction steps [7,8]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Rahmawati

Suendo

Hidayat

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…In the case of nanocomposites the proper amount of grapheme oxide was added in the solution and 1h of sonication ensured homogeneous distribution of the oxide. Teflon or polycarbonate filters were proved suitable for the isolation of the final product in the form of dark powder, which was dried and pressed in circular pellets about 1.3 mm in diameter and 1 mm thick [14][15][16].…”

Section: Methodsmentioning

confidence: 99%

Metal to insulator transition in conducting polyaniline/graphene oxide composites

Neti

Sakellis

Papathanassiou

et al. 2019

Applied Physics Letters

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Broadband Dielectric Spectroscopy (BDS) measurements of Pοlyaniline/Graphene oxide composites were conducted for an as-prepared and a thermally annealed specimen, respectively, from 15K to room temperature.Electrical conductivity values of the annealed composite display a very modest rise denoting the important contributions of the GO component to achieving electrical stability of the polymer. Patterns of the dc conductivity as a function of temperature also reveal a metal to insulator transition around 75K. The transition is dominated by two key factors; temperature and annealing process. Metal-like and insulating features are subsequently detected, as well, and accordingly described to provide a qualitative inspection of the charge transfer mechanisms involved.

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Green synthesis of reduced graphene oxide anchored Fe₃O₄‐Pd hetero‐nanostructure: An efficient, magnetically separable and reusable catalyst for Beckmann rearrangement of aldoximes to amides

Hazarika,

Borah

2023

Applied Organom Chemis

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The multifaceted Fe3O4‐Pd@rGO nanocomposite (NC) has been synthesized successfully by a biogenic method using Ocimum tenuiflorum leaf extract. The preparation of graphene oxide (GO) was done by the well‐known modified Hummer method. The as‐synthesized Fe3O4‐Pd@rGO NC was extensively characterized by various analytical techniques, namely, Fourier transform infrared (FTIR), X‐ray diffraction (XRD), field emission scanning electron microscopy‐energy‐dispersive X‐ray spectroscopy (FESEM‐EDX), high‐resolution transmission electron microscopy (HRTEM), inductively coupled plasma‐atomic emission spectrometry (ICP‐AES), X‐ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM) and Brunauer–Emmett–Teller (BET) surface area analysis. The absence of peak corresponding to υ(CO) at 1732 cm−1 in the FTIR spectrum of Fe3O4‐Pd@rGO enumerates the reduction of GO to reduced graphene oxide (rGO) during Fe3O4‐Pd nanoparticle (NP) synthesis with O. tenuiflorum leaf extract. The XRD pattern reveals the existence of rGO, cubic‐phased spinel‐structured Fe3O4 along with the formation of metallic Pd NP without any impurities. The FESEM image designates the spherical and flake‐like morphology of the NC. The crystallite size of the NC was calculated employing the Debye–Scherrer equation and was found to be 3.45 nm corresponding to the (220) plane. The average particle size of Fe3O4‐Pd NPs as estimated from the particle size distribution curve was ascertained as 3.03 nm. The utmost saturation magnetization value of the NC as evaluated by VSM study has appeared at 0.6219 emu g−1 having coercivity value of 335.1 Oe and remanent magnetization value of 0.0767 emu g−1, suggesting the existence of a ferromagnetic material in the synthesized NC. It was a stable and highly efficient catalyst for Beckmann rearrangement of aldoximes using in an environment‐friendly medium. It afforded up to 99% isolated yield of the preferred products under acid‐free condition, avoiding the use of any harsh chemicals that will be beneficial for future industrial applications. Finally, the magnetic component of the NC allowed for easy recovery of the catalyst, thereby eliminating the chance of leaching of metal atoms, and was reusable till six successive cycles without apparent loss of its catalytic performance.

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Graphene oxide-polyaniline nanocomposites for high performance supercapacitor and their optical, electrical and electrochemical properties

Cited by 25 publications

References 38 publications

Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Metal to insulator transition in conducting polyaniline/graphene oxide composites

Green synthesis of reduced graphene oxide anchored Fe₃O₄‐Pd hetero‐nanostructure: An efficient, magnetically separable and reusable catalyst for Beckmann rearrangement of aldoximes to amides

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Graphene oxide-polyaniline nanocomposites for high performance supercapacitor and their optical, electrical and electrochemical properties

Cited by 25 publications

References 38 publications

Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Reduced Graphene Oxide/Polyaniline Nanocomposite as Efficient Counter Electrode for Dye Sensitized Solar Cells

Metal to insulator transition in conducting polyaniline/graphene oxide composites

Green synthesis of reduced graphene oxide anchored Fe3O4‐Pd hetero‐nanostructure: An efficient, magnetically separable and reusable catalyst for Beckmann rearrangement of aldoximes to amides

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Green synthesis of reduced graphene oxide anchored Fe₃O₄‐Pd hetero‐nanostructure: An efficient, magnetically separable and reusable catalyst for Beckmann rearrangement of aldoximes to amides