Synthesis of conducting polyaniline/TiO<sub>2</sub> composite nanofibres by one‐step <i>in situ</i> polymerization method

Bian, Chaoqing; Yu, Yijun; Xue, Gi

doi:10.1002/app.25636

Cited by 73 publications

(42 citation statements)

References 35 publications

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“…[7][8][9] Nowadays, conducting PANI/metal oxide nanocomposites have also attracted attention. 10 The properties of these nanocomposites are quite different from pristine PANI due to interfacial interactions between metal oxide nanoparticles and PANI macromolecules. 11,12 The composite properties can be easily adjusted to the desired applications via the variation of particle size, shape and the distribution of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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The polyaniline/copper oxide (PANI/CuO) nanocomposite was prepared by mixing solutions of polyaniline and copper oxide nanoparticles in dimethyl sulfoxide (DMSO). The synthesized polymer nanocomposites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. The characteristic peaks in XRD and UVvisible spectra confirmed the presence of CuO in the polymer structure. SEM images indicated morphological changes in the composite matrix as compared to the pristine PANI. The DC conductivity measurements were performed using two-probe method for various temperatures. AC conductivity and dielectric response of the composites were investigated in the frequency range of 10 2 -10 6 Hz using LCR meter. Dielectric permittivity 0 ðwÞ and dielectric loss factor 00 ðwÞ were investigated. It was observed that 0 ðwÞ and 00 ðwÞ decrease with increase in frequency at all temperatures. At a particular frequency it is observed that both 0 ðwÞ and 00 ðwÞ increase with increase in temperature. It was also observed that AC conductivity increased with increase in frequency and temperature.

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Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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“…The XRD pattern for nanoporous TiO 2 shows formation of an anatase-like crystalline network structure having diffraction peaks at the angle of incidence to the sample plate (2h) of 25.2°, 37.8°, 48.0°, and 53.9° [14,[51][52][53]. The XRD peaks from the nanoporous TiO 2 layer are somewhat wider than the peaks from highly crystalline TiO 2 .…”

Section: Characterization By X-ray Diffraction Analysismentioning

confidence: 93%

“…Only reduced intensity of the TiO 2 and ITO peaks was observed. Any XRD patterns assigned to the conducting polymer structure in poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate)/TiO 2 composites [14] or polyaniline/TiO 2 composite nanofibres [52] have not either been observed. These results also indicate that the electropolymerization of OAz did not change the structure of TiO 2 .…”

Section: Characterization By X-ray Diffraction Analysismentioning

confidence: 97%

Electrochemical preparation of oligo(azulene) on nanoporous TiO2 and characterization of the composite layer

2010

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A nanoporous oligo(azulene)-TiO 2 (OAz-TiO 2 ) composite layer was formed by electrochemical oxidation of azulene (Az) on a nanoporous ITO/TiO 2 electrode. Polymerization was performed in tetrabutylammonium hexafluorophosphate electrolyte salt dissolved in acetonitrile. The electrochemical and optical properties of the composite layer were studied by cyclic voltammetry (CV) and in situ UV-vis spectroelectrochemistry. The chemical and crystalline structure of the layer was studied by FTIR and X-ray diffraction (XRD) spectroscopy techniques and the morphology by Scanning Electron Microscopy. The TiO 2 layer was found to have a catalytic activity on the polymerization of Az. The CV experiments in monomerfree electrolyte solution demonstrated the electron donor property of OAz by its p-doping and the electron accepting property of TiO 2 by the large reduction current in the negative potential region. The FTIR and XRD spectroscopic measurements showed the well-defined anatase structure of TiO 2 with inclusion of OAz. A composite layer was formed rather than a bilayer structure. The in situ UVvis spectroelectrochemical measurements gave evidence of a higher delocalization and easier movement of the p-electrons in the composite layer than in pure poly (azulene).

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“…As these findings have been summarized in several reviews [5][6][7][8] and also in a monograph [9], attention will be focused here on more recent developments, notably on the mechanical immobilization of particles on electrodes. Today, a huge amount of information is available for electrochemical systems comprising particles enclosed in polymer films or other matrices (see Refs [10][11][12][13][14][15][16]). Originally, the main aim of such particle enclosure was to achieve specific electrode properties (e.g., functionalized carbon/polymer materials as electrocatalysts [17,18]; solid-state, dye-sensitized solar cells [19]), rather than to study the electrochemistry of the particles.…”

Section: Introductionmentioning

confidence: 99%

“…16 Simulated concentration profiles at a diffusion domain containing a spherical particle. Category 1: s SR ¼ 1000.…”

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confidence: 99%

Solid‐State Electrochemical Reactions of Electroactive Microparticles and Nanoparticles in a Liquid Electrolyte Environment

Hermes

Scholz

2009

Solid State Electrochemistry I

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Many electrochemical conversions of solid compounds and materials, including for example the corrosion of metals and alloys or the electrochemical conversions of most battery materials, take place within a liquid electrolyte environment, with the classic approach to investigation comprising macro-sized electrodes. However, in order to obtain a comprehensive understanding of the mechanism of these solid-state electrochemical reactions, the simple technique of immobilizing small amounts of a solid compound/material on an inert electrode surface provides an easy, yet sometimes exclusive, access to their study. In this chapter is presented a survey of the recent developments of this approach, which is referred to as the voltammetry of immobilized microparticles (VIM). Attention is also focused on progress in the field of theoretical descriptions of solid-state electrochemical reactions.

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Synthesis of conducting polyaniline/TiO₂ composite nanofibres by one‐step in situ polymerization method

Cited by 73 publications

References 35 publications

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Electrochemical preparation of oligo(azulene) on nanoporous TiO2 and characterization of the composite layer

Solid‐State Electrochemical Reactions of Electroactive Microparticles and Nanoparticles in a Liquid Electrolyte Environment

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Synthesis of conducting polyaniline/TiO2 composite nanofibres by one‐step in situ polymerization method

Cited by 73 publications

References 35 publications

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Electrochemical preparation of oligo(azulene) on nanoporous TiO2 and characterization of the composite layer

Solid‐State Electrochemical Reactions of Electroactive Microparticles and Nanoparticles in a Liquid Electrolyte Environment

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Synthesis of conducting polyaniline/TiO₂ composite nanofibres by one‐step in situ polymerization method