1. Home
    2. Journals
    3. Bulletin of Materials Science
    4. Volume 45
    5. All articles

    • Tuning the optical properties, AC conductivity and dielectric modulus of PVA membrane by inclusion of TiO$_2$ nanoparticles

      M F ZAKI A TAYEL A B EL BASATY

      Volume 45 Published: 25 November 2022 Article ID 0236

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0236

    • Keywords

       

      PVA/TiO$_2$ nanocomposite membranes; linear optical parameters; photoluminescence emission; AC conductivity; electric modulus.

    • Abstract

       

      The article demonstrates the feasibility of tuning the optical and electrical properties of polyvinyl alcohol (PVA) by adding different wt% of TiO$_2$ nanoparticles (0.001–0.01 wt%). UV–visible, photoluminescence and LCR spectroscopies techniques were used. UV–visible measurements of PVA/TiO$_2$ membranes displayed a shift in the absorbance edge across the region of longer wavelength. This reflects a decrease in the bandgap energy, which indicates an increase in the electrical AC conductivity of the samples. Furthermore, the transmittance of a pure PVA membrane decreases from 85% for pure PVA to 3% for PVA/TiO$_2$ with 0.01 wt%. In addition, an amendment was observed in the optical parameters of nanocomposite membranes. The photoluminescence emission spectra exhibited a luminescence response of the PVA/TiO$_2$ samples and significant emission bands were generated with the increase in the TiO$_2$ nanoparticles. With increasing TiO$_2$ nanoparticles, an increase in the AC conductivity and an improvement in the dielectric parameters of the samples were observed. The electric modulus was calculated and used to evaluate the relaxation behaviour in the nanocomposite membranes.

    • Author Affiliations

       

      M F ZAKI1 A TAYEL2 A B EL BASATY2

      1. Experimental Nuclear Physics Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
      2. Faculty of Technology and Education, Basic Science Department, Helwan University, Cairo 11281, Egypt

    • Dates

       
      Published
      25 November 2022
      Manuscript received
      6 May 2022
      Accepted
      29 July 2022
      Final version published online
      25 November 2022

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2022-2023 Indian Academy of Sciences, Bengaluru.

Contact | Site index