Temperature dependence of electrical conduction in pure and doped polypyrrole

Shaktawat, Vinodini; Jain, Neeraj; Saxena, Rashmi; Saxena, N. S.; Sharma, Kailash Chand; Sharma, T.P.

doi:10.1007/s00289-006-0580-9

Cited by 47 publications

(20 citation statements)

References 3 publications

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“…Polypyrrole is a conductive polymer with extending π-conjugated electron systems34. During the oxidation of pyrrole by ZnO 2 in presence of Cl − ion, electron radical was formed on the carbon site of polypyrole chain, as indicated below4955.…”

Section: Resultsmentioning

confidence: 99%

A New Synergetic Nanocomposite for Dye Degradation in Dark and Light

Prasanna

Vijayaraghavan

2016

Sci Rep

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Environmental hazard caused due to the release of dyes in effluents is a concern in many countries. Among the various methods to combat this problem, Advanced Oxidation Process, in which semiconductor photocatalysts are used, is considered the most effective one. These materials release Reactive Oxygen Species (ROS) such as hydroxyl radical and superoxide in suspension that degrade the dyes into non-toxic minerals. However, this process requires visible or UV light for activation. Hence, there is a need to develop materials that release ROS, both in the absence and in the presence of light, so that the efficiency of dye removal is enhanced. Towards this objective, we have designed and synthesized a new nanocomposite ZnO2/polypyrrole which releases ROS even in the dark. The ROS released in the dark and in light were estimated by standard methods. It is to be noted that ZnO2 degrades the dye only under UV light but not in dark or in the presence of visible light. We propose the mechanism of dye degradation in dark and light. The synergically coupled nanocomposite of ZnO2/ppy is the first example that degrades dyes in the dark, through advanced oxidation process without employing additional reagents.

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Section: Resultsmentioning

confidence: 99%

A New Synergetic Nanocomposite for Dye Degradation in Dark and Light

Prasanna

Vijayaraghavan

2016

Sci Rep

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“…Emeraldine base form of polyaniline is redoped with oxalic acid (1 M), washed thoroughly, dried under vacuum for 8 hrs at 60 0 C temperature and then ground to fine powder in mortar pestle, to obtain doped PANI. Conducting polypyrrole doped with oxalate ion was prepared by oxidative polymerization of double distilled monomer using ammonium persulfate (APS), (NH 4 ) 2 S 2 O 8 as an oxidant described elsewhere [7].The polymerization was performed at 0 o C temperature with oxidant/ monomer molar ratio 0.2 and dopant/ monomer molar ratio 0.5 This precipitate of polypyrrole in its salt form is reduced by NaOH solution to obtain pure PPy.…”

Section: Materials Preparation and Experimental Techniquementioning

confidence: 99%

Structural and Electrical Study of Conducting Polymers

Shaktawat¹,

Dixit²,

Saxena³

et al. 2010

AIP Conference Proceedings

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Pure and oxalic acid doped conducting polymers (polyaniline and polypyrrole) were chemically synthesized using ammonium persulfate (APS) as an oxidant. These samples were characterized through Scanning Electron Microscopy (SEM), which provides information about the surface topography of polymers. I-V characteristics have been recorded at room temperature as well as in the temperature range from 313 K to 463 K. So obtained characteristic curves were found to be linear. Temperature dependence of conductivity suggests a semiconducting nature in polyaniline samples with increase in temperature, whereas oxalic acid doped polypyrrole sample suggests a transition from semiconducting to metallic nature with the increase of temperature.

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“…5. From the results, PPy‐PVA and PPG composites show linear relationships and ohmic behavior [49, 50]. Water solubility tests were performed, and their DC electrical conductivities were measured at room temperature.…”

Section: Resultsmentioning

confidence: 99%

Microstructural and microwave shielding characteristics of water‐soluble polypyrrole–polyvinyl alcohol–graphite oxide core–shell nanocomposites

et al. 2012

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This article reports on a facile route for the preparation of polypyrrole–polyvinyl alcohol–graphite oxide nanocomposites through the polymerization of pyrrole with different concentration (wt%) of graphite oxide using ammonium persulfate as an oxidant. The synthesized nanocomposites were characterized by Fourier transform infrared spectroscopy, and their surface morphologies were studied by scanning electron microscopy and transmission electron microscopy. Their solubility in water, DC conductivity in solution, and the current–voltage characteristics of the nanocomposites were studied. Furthermore, the microwave absorption at 1.0–10.0 MHz and the effects of sample thickness on the microwave absorption were investigated. The composites including higher concentration of graphite oxide showed increased solubility and electrical conductivity, and high electromagnetic shielding effectiveness. POLYM. COMPOS. 2012. © 2012 Society of Plastics Engineers

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Temperature dependence of electrical conduction in pure and doped polypyrrole

Cited by 47 publications

References 3 publications

A New Synergetic Nanocomposite for Dye Degradation in Dark and Light

A New Synergetic Nanocomposite for Dye Degradation in Dark and Light

Structural and Electrical Study of Conducting Polymers

Microstructural and microwave shielding characteristics of water‐soluble polypyrrole–polyvinyl alcohol–graphite oxide core–shell nanocomposites

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