A comprehensive study on structural, optical, electrical, and dielectric properties of PVA-PVP/Ag-TiO2 nanocomposites for dielectric capacitor applications

Authors

  • Abdu Saeed Author
  • Essam Banoqitah Author
  • J.A. Mohammed Abdulwahed Author
  • Fawziah Alajmi Author
  • Aysh Y. Madkhli Author
  • F.A. Al-Marhaby Author
  • Kholoud Albaidani Author
  • Merfat Algethami Author
  • Awatef S. Assran Author
  • Reem Alwafi Author
  • G.M. Asnag Emirates International University image/svg+xml Author

DOI:

https://doi.org/10.1016/j.jallcom.2023.173412

Abstract

Nanocomposites made from polymers and nanoparticles (NPs) have a wide range of uses. Herein, the polymer nanocomposite electrolyte films were prepared by blending polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) with hybrid NPs of silver (Ag) and titanium dioxide (TiO2). The structural, optical, electrical, and dielectric properties of the resulting PVA-PVP/Ag-TiO2 nanocomposite electrolytes were analyzed. XRD analysis revealed that the PVA-PVP blend had a semicrystalline structure, and the addition of hybrid NPs reduced the crystallinity ratio. FTIR analysis showed that the intensity decreased as the content ratio of hybrid NPs increased. Optical measurements showed that the nanocomposite electrolyte samples' direct and indirect optical energy gap decreased with the increasing content of hybrid NPs. The electrical conductivity also increased with the hybrid NPs' content, likely due to the higher conductivity of the hybrid NPs compared to the polymer blend matrix's electrical conductivity. The dielectric constant (εr) and dielectric loss (εi) increased with the concentration of hybrid NPs at lower frequencies, indicating the polarization effects of space charges. The capacitance–frequency (C–f) and conductance–frequency (G/ω–f) curves of the prepared polymer nanocomposites exhibited a discernible enhancement correlating with the increased content of Ag-TiO2 nanofillers. The impedance spectroscopy data were analyzed using Nyquist plots, which showed a single semicircular arc whose radius of curvature decreased with increasing the hybrid NPs loading, indicating a decrease in the overall impedance of the nanocomposite electrolytes with the mixed NPs loading. The impedance reduction and dielectric feature increase were attributed to the interfacial polarization between the hybrid NPs and the polymeric matrix. These findings suggest that the PVA-PVP/Ag-TiO2 nanocomposite electrolytes could be used for thin-film dielectric capacitor applications.

Author Biographies

  • Abdu Saeed
    Abdu Saeed

    View in Scopus

    Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia   Department of Physics, Thamar University, Thamar 87246, Yemen   Corresponding author at: Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia. Abdusaeed79@hotmail.com Abdusaeed@tu.ed.ye
  • Essam Banoqitah
    Essam Banoqitah Nuclear Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia   Center for Training & Radiation Prevention, King Abdulaziz University, Jeddah 21589, Saudi Arabia   Corresponding author at: Nuclear Engineering Department, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia. ebanoqitah@kau.edu.sa
  • J.A. Mohammed Abdulwahed
    J.A. Mohammed Abdulwahed Physics Department, College in Qunfudah-Female, Umm Al-Qura University, Makkah, Saudi Arabia   Corresponding authors. jaabdulwahed@uqu.edu.sa
  • Fawziah Alajmi
    Fawziah Alajmi Department of Chemistry, Faculty of Arts and Science, Najran University, Najran 11001, Saudi Arabia
  • Aysh Y. Madkhli
    Aysh Y. Madkhli Department of Physical Sciences, College of Science, Jazan University, P.O.Box.114, Jazan 45142, Saudi Arabia
  • F.A. Al-Marhaby
    F.A. Al-Marhaby Department of Physics, Al-Qunfudhah University College, Umm Al-Qura University, Makkah 24230, Saudi Arabia
  • Kholoud Albaidani
    Kholoud Albaidani Physics Department, Faculty of Science, King Khalid University, Abha 61411, Saudi Arabia  
  • Merfat Algethami
    Merfat Algethami Physics Department, Faculty of Science, Taif University, Taif 26513, Saudi Arabia
  • Awatef S. Assran
    Awatef S. Assran Chemistry Department, Faculty of Science at Qena, South Valley University, Qena 83523, Egypt   Chemistry Department, Faculty of Science, Taif University, Taif 26513, Saudi Arabia   Corresponding author at: Chemistry Department, Faculty of Science at Qena, South Valley University, Qena 83523, Egypt. a.assran@gmail.com
  • Reem Alwafi
    Reem Alwafi Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • G.M. Asnag, Emirates International University
    G.M. Asnag Department of Biomedical Engineering, College of Engineering and Information Technology, Emirates International University, Sana’a 16881, Yemen   Corresponding authors. g.asnag@yahoo.com

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Saeed, A., Banoqitah , E., Abdulwahed, J. M., Alajmi, F., Madkhli, A. Y., Al-Marhaby, F., Albaidani, K., Algethami, M., Assran, A. S.,  Alwafi, R., & Asnag, G. (2024). A comprehensive study on structural, optical, electrical, and dielectric properties of PVA-PVP/Ag-TiO2 nanocomposites for dielectric capacitor applications. Emirates International University Digital Repository, 1(1). https://doi.org/10.1016/j.jallcom.2023.173412

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