Preparation of Highly Conductive Polypyrrole/Graphite Oxide Composites via in situ Polymerization

Gu, Zhennan; Zhang, L.; Li, Chunzhong

doi:10.1080/00222340903035576

Cited by 38 publications

(18 citation statements)

References 21 publications

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“…9 Similarily, microtubules of polypyrrole were also synthesized by an electrochemical templatefree method in the presence of β-naphthalenesulfonic acid as a dopant by Yang et al 10 Hornshaped PPY was prepared using pulse potentiometry technique by Wang et al 11 PPY was found to be compatible material for the immobilization of DNA probes where the DNA was used as dopant for PPY. 13 The presence of oxygen-containing functional groups, such as hydroxyl, epoxide, carbonyl, carboxyl, etc., makes GO hydrophilic in nature which helps it to interact with solvents. These material properties can be improved by forming either pyrrole copolymers or PPY composites or blends with commercially available polymers or inorganic materials, which offer better mechanical and optical properties as well as stability and processability.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticle decorated graphene sheet-polypyrrole based nanocomposite: its synthesis, characterization and genosensing application

et al. 2015

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We report herein the synthesis of gold nanoparticle (GNP) decorated-graphene sheets (GO-GNPs) using the template of graphene oxide (GO) by a one-pot solution-based method. A polypyrrole-GO decorated GNP nanocomposite (GO-GNP/PPY) has been electropolymerized using a potentiodynamic method on an indium tin oxide (ITO) coated glass substrate. The as-synthesized nanocomposites are characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared and Raman spectroscopy. It has been found that GNPs of ca. 13 nm are uniformly dispersed on the surface of GO, and have a high electrochemically active surface area. The surface morphology studies show that PPY structure changes from nanoflowers to nanostars and then to nanosheets with an increase in the scan rate (20-200 mV s(-1)). The prepared GO-GNP/PPY/ITO electrode was further used as a genosensor, where the electrochemical response was measured using methylene blue (MB) as a redox indicator. The genosensor shows a response time of 60 s with high sensitivity (1 × 10(-15) M) and linearity (1 × 10(-15)-1 × 10(-6) M) with the correlation coefficient of 0.9975.

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Section: Introductionmentioning

confidence: 99%

Gold nanoparticle decorated graphene sheet-polypyrrole based nanocomposite: its synthesis, characterization and genosensing application

et al. 2015

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“…In this paper, we presented a facile method for the synthesis of PPy doped with ASPB (PPy/ASPB nanocomposite) by in situ chemical oxidative polymerization [21,22]. For comparison, PPy was synthesized first.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Na¹,

Li²,

Yuan³

et al. 2012

Express Polym. Lett.

168

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Abstract. The procedures for the synthesis of polypyrrole (PPy) doped with anionic spherical polyelectrolyte brushes (ASPB) (PPy/ASPB nanocomposite) by means of in situ chemical oxidative polymerization were presented. Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopic analysis suggested the bonding structure of PPy/ASPB nanocomposite. Scanning electron microscopy (SEM) was used to confirm the morphologies of samples. The crystallographic structure, chemical nature and thermal stability of conducting polymers were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Thermo-gravimetric analysis (TGA) respectively. Investigation of the electrical conductivity at room temperature showed that the electrical conductivity of PPy/ASPB nanocomposite was 20 S/cm, which was higher than that of PPy (3.6 S/cm).

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“…Nanostructured materials often possess a combination of physical and mechanical properties not present in conventional composites, such as electrical conductivity or electrochemical activity. Previous research on GO/PPy nanocomposites (GPYs) has been primarily focused on the improvement of the conductivity and thermal stability of GO [14][15][16][17]. Little attention has been given to the effect of feeding ratios on the structure and electrochemical performance of such composites.…”

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Effect of feeding ratios on the structure and electrochemical performance of graphite oxide/polypyrrole nanocomposites

2011

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Graphite oxide (GO)/polypyrrole (PPy) nanocomposites (GPYs) were synthesized using in situ polymerization. The effect of the feeding ratios of pyrrole and GO on the structure and electrochemical performances of GPYs was investigated. The structure was characterized via Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The electrochemical performance was characterized via cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The results indicate that the more pyrrole is added to GO (with GO concentrations of 20% and 50%), the more agglomeration of both PPy and GO layers occurs. This is detrimental to the capacitance utilization of PPy. When the feeding ratio of GO : pyrrole is 80 : 20, PPys with nanofibrils are dispersed homogenously in/on the exfoliated layer of GO and the conductivity is enhanced. The capacitance utilization of PPy in a composite with a GO concentration of 80% (383 F/g) is higher than that of pure PPy (201 F/g), which indicates the presence of a synergistic effect between GO and PPy. Graphite oxide (GO) is a lamellar material which can be exfoliated into the graphene oxide by applying mechanical energy in highly polar solvents, such as water [1]. Recently, GO has received rapidly growing interest because of its unique structure and properties. GO sheets possess a number of hydroxyl and epoxide functional groups anchored onto the surface sp 3 -hybridized carbon atoms. Moreover, they have considerable amounts of sp 2 -hybridized carbon atom-containing carboxyl and carbonyl groups at their sheet edges. Thus, they can be readily dispersed in water [2][3][4][5][6]. Meanwhile, these oxygen-containing groups impart the GO sheets strong reactivity with small polar molecules and polymers, which form GO composites.Micrometer-or nanometer-sized conducting polymers and their composites have attracted great attention primarily because of their potential applications in batteries, sensors, capacitors, and field-emission applications [7][8][9][10][11][12][13]. Among the conducting polymers and composites that have been studied, polypyrrole (PPy) and its composites are among the most extensively studied. This is because they possess high electrical conductivity, interesting redox properties and relatively high environmental stability. Furthermore, PPy is easy to prepare via chemical or electrochemical processes. The electronegative groups of GO, especially carboxyl and hydroxyl groups, can act as the "active sites" for the polymerization of pyrrole [14]. The morphology of the obtained polymers is an oriented nanostructure, such as nanofibers or nanowires. Nanostructured materials often possess a combination of physical and mechanical properties not present in conventional composites, such as electrical conductivity or electrochemical activity. Previous research on GO/PPy nanocomposites (GPYs) has been primarily focused on the improvement of the conductivity and thermal stability of . Little att...

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Preparation of Highly Conductive Polypyrrole/Graphite Oxide Composites via in situ Polymerization

Cited by 38 publications

References 21 publications

Gold nanoparticle decorated graphene sheet-polypyrrole based nanocomposite: its synthesis, characterization and genosensing application

Gold nanoparticle decorated graphene sheet-polypyrrole based nanocomposite: its synthesis, characterization and genosensing application

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Effect of feeding ratios on the structure and electrochemical performance of graphite oxide/polypyrrole nanocomposites

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