Non-covalent functionalization of graphene sheets by sulfonated polyaniline

Bai, Hua; Xu, Yuxi; Zhao, Lu; Li, Chun; Shi, Gaoquan

doi:10.1039/b821805f

Cited by 594 publications

(381 citation statements)

References 22 publications

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“…2(a)) has good stability, electrochemical properties and water solubility, and is therefore used for the non-covalent functionalization of graphene sheets. This new functionalized graphene is soluble in water at high concentrations (> 1 mg/L) and exhibits good conductivity, with potential application in the field of electrochemistry [39]. Graphene oxide has been functionalized with endfunctional polymers which includes polystyrene (-NH 2 ), polystyrene (-COOH) and poly (methyl methacrylate) (-OH).…”

Section: Noncovalent Functionalizationmentioning

confidence: 99%

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

et al. 2012

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Abstract:Graphene, as an intermediate phase between fullerene and carbon nanotube, has aroused much interests among the scientific community due to its outstanding electronic, mechanical, and thermal properties. With excellent electrical conductivity of 6000 S/cm, which is independent on chirality, graphene is a promising material for high-performance nanoelectronics, transparent conductor, as well as polymer composites. On account of its Young's Modulus of 1 TPa and ultimate strength of 130 GPa, isolated graphene sheet is considered to be among the strongest materials ever measured. Comparable with the single-walled carbon nanotube bundle, graphene has a thermal conductivity of 5000 W/(m·K), which suggests a potential application of graphene in polymer matrix for improving thermal properties of the graphene/polymer composite. Furthermore, graphene exhibits a very high surface area, up to a value of 2630 m 2 /g. All of these outstanding properties suggest a wide application for this nanometer-thick, two-dimensional carbon material. This review article presents an overview of the significant advancement in graphene research: preparation, functionalization as well as the properties of graphene will be discussed. In addition, the feasibility and potential applications of graphene in areas, such as sensors, nanoelectronics and nanocomposites materials, will also be reviewed.

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Section: Noncovalent Functionalizationmentioning

confidence: 99%

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

et al. 2012

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“…The synthesis method is simple and inexpensive because it does not require surfactants and inorganic or organic acids as the dopant, opening a new way to prepare hybrid materials and has a great potential for the applications especially for electrochemical supercapacitors. A few numbers of studies of the synthesis of sulfonated polyaniline/r-GO have been reported [36,37].…”

Section: Introductionmentioning

confidence: 99%

Water-soluble polyaniline/graphene composites as materials for energy storage applications

Solonaru¹,

Grigoraş²

2017

Express Polym. Lett.

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Abstract. Three water-dispersable composites have been synthesized by in situ chemical oxidative polymerization of aniline N-propanesulfonic acid (AnS) in reduced graphene oxide (r-GO) dispersion, in an ice bath at 0°C and in the absence of any surfactant. The mass ratio between r-GO and aniline monomer have been established as (m r-GO :m AnS ) = 1:1, 1:2 and 1:5 while in the composites, the mass ratio between r-GO and polyaniline was found: 1:0.3, 1:0.5 and 1:1, respectively. The molecular structure, morphology, and optical properties of the composites were analyzed through Fourier transform infrared (FTIR), Raman and ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Electrochemical performances for energy storage were evaluated by cyclic voltammetry and galvanostatic charge/discharge measurements with 1M H 2 SO 4 as electrolyte in a three-electrode cell. The composite with the mass ratio (m r-GO :m PAnS ) = 1:1 has showed good capacitive behavior with a specific capacitance of 1019 F/g at scan rate of 1 mV/s calculated from integrated area of cyclic voltammogram curve and a retention life of 80% after 100 cycles. These results indicate that the composites prepared by chemical oxidative polymerization are promising materials for electrode supercapacitors.

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“…[16][17][18][19] It is of great importance to develop optimized electrode materials based on graphene which combine both the intrinsic high charge carrier conductivity and chemical stability in aqueous solutions. It is widely reported that functionalized graphene nanoribbons can speed/hinder charge carrier exchange and hence affect the overall performance of electrodes used in diverse electrochemical devices.…”

Section: Introductionmentioning

confidence: 99%

Charge carrier exchange at chemically modified graphene edges: a density functional theory study

Liao

Sun

et al. 2012

J. Mater. Chem.

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Heteroatom doping on the edge of graphene may serve as an effective way to tune chemical activity of carbon-based electrodes with respect to charge carrier transfer in an aqueous environment. In a step towards developing mechanistic understanding of this phenomenon, we explore herein mechanisms of proton transfer from aqueous solution to pristine and doped graphene edges utilizing density functional theory. Atomic B-, N-, and O-doped edges as well as the native graphene are examined, displaying varying proton affinities and effective interaction ranges with the H 3 O + charge carrier. Our study shows that the doped edges characterized by more dispersive orbitals, namely boron and nitrogen, demonstrate more energetically favourable charge carrier exchange compared with oxygen, which features more localized orbitals. Extended calculations are carried out to examine proton transfer from the hydronium ion in the presence of explicit water, with results indicating that the basic mechanistic features of the simpler model are unchanged.

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Non-covalent functionalization of graphene sheets by sulfonated polyaniline

Abstract: Graphene sheets were stably dispersed in water by functionalization with sulfonated polyaniline (SPANI), and the composite film of SPANI-functionalized graphene showed improved electrochemical stability and enhanced electrocatalytic activity.

Cited by 594 publications

References 22 publications

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

Water-soluble polyaniline/graphene composites as materials for energy storage applications

Charge carrier exchange at chemically modified graphene edges: a density functional theory study

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