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Journal ArticleDOI

Preparation and electrical conductivity of SiO2/polypyrrole nanocomposite

Qunwei Tang1, Xiaoming Sun1, Qinghua Li1, Jianming Lin1, Jihuai Wu1 
01 Feb 2009-Journal of Materials Science (Springer US)-Vol. 44, Iss: 3, pp 849-854
TL;DR: In this paper, a chemically polymerized silica/polypyrrole (SiO2/PPy) nanocomposite was presented in the presence of sodium dodecyl benzene sulfate (SDBS) as dopant and iron chloride (FeCl3) as oxidant.
Abstract: In the present study we have chemically polymerized silica/polypyrrole (SiO2/PPy) nanocomposite in the presence of sodium dodecyl benzene sulfate (SDBS) as dopant and iron chloride (FeCl3) as oxidant. The SiO2/PPy nanocomposite presents an electrical conductivity of 32.41 S cm−1 and percolation threshold of 20 wt%. The resulting SiO2/PPy nanocomposites have been extensively characterized in terms of their molecular structure, particle size, morphology, stability, and electroactivity. These SiO2/PPy particles have a rather polydisperse morphology. The effects of synthesis parameters such as oxidant, PPy, SDBS, reaction temperature and time, on the electrical conductivity of the nanocomposite have been detailedly optimized. And the conducting nanocomposite presented a good environmental stability.
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Journal ArticleDOI
TL;DR: In this paper, a review of polymer-based inorganic nanoparticle composites is presented, where the potential applications of the resultant nanocomposites are various, e.g., automotive, aerospace, opto-electronics, etc.
Abstract: Polymers are considered to be good hosting matrices for composite materials because they can easily be tailored to yield a variety of bulk physical properties. Moreover, organic polymers generally have long-term stability and good processability. Inorganic nanoparticles possess outstanding optical, catalytic, electronic and magnetic properties, which are significantly different their bulk states. By combining the attractive functionalities of both components, nanocomposites derived from organic polymers and inorganic nanoparticles are expected to display synergistically improved properties. The potential applications of the resultant nanocomposites are various, e.g. automotive, aerospace, opto-electronics, etc. Here, we review recent progress in polymer-based inorganic nanoparticle composites.

418 citations


Cites background from "Preparation and electrical conducti..."

  • ...The conductivity variation curve of PPy/SrFe12O19 nanocomposite (adapted from [68])....

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  • ...reported PPy/SiO2 nanocomposites prepared by in situ oxidative polymerization [68]....

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Journal ArticleDOI
TL;DR: In this paper, a facile chemical oxidation polymerization approach was used to synthesize PPy/ZnO composites with varying amounts of zinc oxide (0.20 -20 kg) via facile chemolymmetric polymerization and XRD, FT-IR, TGA, DSC, SEM and four-probe method respectively.

118 citations

Journal ArticleDOI
TL;DR: In this paper, a novel gel polymer electrolyte based on poly(acrylic acid-g-gelatin)/polypyrrole with conductivity of 14.1mS−cm−1 was prepared.

66 citations

Journal ArticleDOI
TL;DR: In this article, a three-dimensional polypyrrole imbibed poly(hydroxyethyl acrylate)/poly(ethylene glycol) gel electrolyte has been successfully synthesized using the adsorption behavior of amphiphilic pyrrole monomers.

60 citations

Journal ArticleDOI
TL;DR: In this article, the behavior and electro-catalytic activity of polyaniline matrixes coated on titanium substrate was characterized by cyclic voltammetry and scanning electron microscopy and energy-dispersive X-ray techniques.
Abstract: Silver nanoparticles dispersed in polyaniline matrixes coated on titanium substrate, as a novel electrode, was easily synthesized by electro-polymerization of aniline on titanium and then electrodeposited silver nanoparticles on PAni electrode. The electrochemical behavior and electro-catalytic activity of silver nanoparticles/PAni/Ti electrodes were characterized by cyclic voltammetry. The morphology of silver nanoparticles on PAni/Ti electrodes were characterized by scanning electron microscopy and energy-dispersive X-ray techniques, respectively. Results indicated that silver nanoparticles with a diameter of about 40–70 nm were homogeneously dispersed on the surface of polyaniline film. The silver nanoparticles/PAni/Ti electrodes were examined for electro-catalytic activity toward oxidation of hydrazine. The results show that these modified electrodes are highly active for electro-catalytic oxidation of hydrazine.

56 citations

References
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Journal ArticleDOI
TL;DR: In this article, a review of inorganic nanoparticles with conducting polymers, giving rise to a host of nanocomposites with interesting physical properties and important application potential are discussed.
Abstract: Inorganic nanoparticles of different nature and size can be combined with the conducting polymers, giving rise to a host of nanocomposites with interesting physical properties and important application potential. Such nanocomposites have been discussed in this review, throwing light on their synthesis techniques, properties, and applications. A large variety of nanoparticles have been chosen in this respect with inclusion techniques utilizing both chemical and electrochemical routes. The nature of the association between the components can be studied from TEM pictures. Depending upon the synthesis techniques and the characteristics of the inorganic materials, ultimate properties of the resulting composite are controlled. In this way, the exceptional colloidal stability of different silica sols have been utilized to form stable PPy-silica and PAn-silica nanocomposite colloids. Similarly the magnetic susceptibility of γ-Fe2O3, the elctrochromic property of WO3, and the catalytic activity of Pd, Pt, etc. met...

1,244 citations

Journal ArticleDOI
TL;DR: In this paper, a dye-sensitized solar cell (DSC) was characterized using electrochemical impedance spectroscopy (EIS) to characterize the electrolyte/platinum interface of a DSC.

1,230 citations

Journal ArticleDOI
01 Dec 1989-Polymer
TL;DR: In this article, the polymerization of aniline in aqueous solutions was studied as a function of a wide variety of synthesis parameters, such as pH, relative concentration of reactants, polymerization temperature and time.

590 citations

Journal ArticleDOI
Yasuteru Saito1, Wataru Kubo1, Takayuki Kitamura1, Yuji Wada1, Shozo Yanagida1 
TL;DR: The PEDOT-TsO film had porous structure and charge transfer resistance decreased with the thickness of the poly(3,4-ethylenedioxythiophene) electrode.
Abstract: I−/I3− redox reaction behaviors on chemically polymerized p-toluenesulfonate doped poly(3,4-ethylenedioxythiophene) (PEDOT-TsO) and sputtered-Pt electrode were characterized to compare its performance as the counter electrode in dye sensitized solar cells (DSCs). Adsorption of iodide species at the PEDOT surface, as well as Pt surface was little affected the redox reaction at the low concentration of redox couple. The PEDOT-TsO film had porous structure and charge transfer resistance of the PEDOT-TsO electrode decreased with the thickness. Photovoltaic performance of DSCs with PEDOT-TsO counter electrode (CE) also improved with the thickness of PEDOT-TsO when ionic liquid was used for the electrolyte. The use of porous PEDOT-TsO counter electrode that has low cost, simplified fabrication process and sufficient catalytic activity could enhance the potential of the DSCs for practical use.

373 citations

Journal ArticleDOI
TL;DR: In this paper, conducting polyaniline/tungsten oxide (WO 3 ) composites have been synthesized by "in situ" deposition technique by placing fine graded WO 3 in polymerization mixture of aniline.
Abstract: Conducting polyaniline/tungsten oxide (WO 3 ) composites have been synthesized by ‘in situ’ deposition technique by placing fine graded WO 3 in polymerization mixture of aniline. This is a single step polymerization process for the direct synthesis of emeraldine salt phase of the polymer. The results were also well supported by FTIR spectral analysis, scanning electron microscope (SEM), XRD and conductivity measurements. High temperature conductivity measurements show thermal activated behavior. The change in resistance with respect to percent relative humidity (RH) is observed. The composites in the pellet form exhibit almost linear behavior within a chosen range of humidity (ranging between 10 and 95% RH).

233 citations