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Fabrication, nanostructure evaluation, 3D electrical transport and electrochemical capacitance of PEDOT–Ti(IV)-doped iron(III) oxide nanocomposite

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Abstract

Poly[3,4-(ethylenedioxy)thiophene] (PEDOT) nanocomposites (NCs) reinforced by varying titanium(IV)-doped iron(III) nano oxide (NITO) particles have been fabricated in dodecylbenzene sulphonic acid by in situ polymerization process using ammonium perdisulfate as initiator. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, electron microscopy, BET surface analysis etc. followed by subsequent evaluation of thermal properties, temperature-dependent 3D electrical transport. Thermal stability of the NCs increased with increasing NITO amount in PEDOT matrix. Electrical conductivity of the NCs increased significantly with increasing NITO content (0.45–67.73 S cm−1) and also with the temperature (50–300 K). 3D variable range hopping conduction mechanism explained the conduction pathways. Specific capacitance of NCs are enhanced with higher NITO content in polymer from 107 F g−1 (pristine PEDOT) to 158 F g−1 (NC) owing to the development of mesoporous (pore size: 4.1 nm and cylindrical pore volume: 0.103 cm3 g−1) structure and high specific surface area (~104 m2 g−1).

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Acknowledgements

Authors sincerely acknowledge the Council of Scientific and Industrial Research (CSIR), New Delhi (INDIA) for providing financial support of this work, and also the Head, Department of Chemistry and the Vice-Chancellor of Presidency University, Kolkata for laboratory facilities. Authors are also thankful to Dr. A. Nayek, Department of Physics of Presidency University for helping with X-ray diffraction analysis of the samples.

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Authors and Affiliations

  1. Department of Chemistry and Bio-Chemistry, Presidency University (Formerly Presidency College), 86/1 College Street, Kolkata, 700073, India

    Debabrata Nandi, Arup K. Ghosh & Uday Chand Ghosh

  2. Chemical Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, 700064, India

    Amitabha De

  3. Material Science Section, Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata, 700064, India

    Pintu Sen

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  1. Debabrata Nandi
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  2. Arup K. Ghosh
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  3. Amitabha De
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  5. Uday Chand Ghosh
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Correspondence to Debabrata Nandi or Uday Chand Ghosh.

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Nandi, D., Ghosh, A.K., De, A. et al. Fabrication, nanostructure evaluation, 3D electrical transport and electrochemical capacitance of PEDOT–Ti(IV)-doped iron(III) oxide nanocomposite. J Mater Sci 49, 776–785 (2014). https://doi.org/10.1007/s10853-013-7760-4

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