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<p>In this study, the polymer nanocomposites (PNC) films, which consist of chitosan (CS), poly (vinyl) pyrrolidone (PVP), and iron vanadate (FeVO<sub>4</sub>) nanoparticles (FVO NPs) were prepared utilizing the solution casting method. Numerous investigations, including structural, vibrational, electrical, dielectric, and optical tests, demonstrate promising properties of the generated polymer nanocomposites. Up to a 1.5 weight% FVO concentration, the sample’s amorphous character improved, according to the Xray diffraction (XRD) examination. The existence of intermolecular interactions in the nanocomposite was confirmed by Fourier transform infrared spectroscopy (FTIR) and UV-Visible spectroscopy. Experimental results showed that the nanocomposites’ optical bandgap decreased as the FVO concentration grew. The investigative values of the <i>ε</i>′, <i>ε</i>′′, and σ<sub>ac</sub> show notable differences in frequency. It is found that the values of the <i>ε</i>′ and <i>ε</i>′′ rise with frequency. It is shown that when the frequency increases, so does the σ<sub>ac</sub>. The σ<sub>ac</sub> value increased with frequency, reaching 4.14 × 10<sup>− 6</sup> S·cm<sup>− 1</sup> at 10<sup>4</sup> Hz from 5.42 × 10<sup>− 10</sup> S·cm<sup>− 1</sup> at 100&#xa0;Hz. An increase in σ<sub>ac</sub> values is observed when the loading of FVO NPs is increased. Dielectric analyses showed that the CS/PVP/1.2%FVO nanocomposite sample had the best boost. Additionally, the energy density rose from 4.2 × 10<sup>− 7</sup> J/m<sup>3</sup> for CS/PVP to 1.35 × 10<sup>− 6</sup> J/m<sup>3</sup> for CS/PVP/1.2%FVO. The results show that the CS/PVP/FVO films can be used in energy storage applications because of their dielectric properties, which are successfully improved by increasing the FVO concentration.</p>

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Multifunctional chitosan/polyvinyl pyrrolidone/iron vanadate nanocomposites: insights into structural, optical, electrical, and dielectric properties for sustainable applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月10日

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  • Amani M. Al-Harthi,
  • A. Rajeh

摘要

In this study, the polymer nanocomposites (PNC) films, which consist of chitosan (CS), poly (vinyl) pyrrolidone (PVP), and iron vanadate (FeVO4) nanoparticles (FVO NPs) were prepared utilizing the solution casting method. Numerous investigations, including structural, vibrational, electrical, dielectric, and optical tests, demonstrate promising properties of the generated polymer nanocomposites. Up to a 1.5 weight% FVO concentration, the sample’s amorphous character improved, according to the Xray diffraction (XRD) examination. The existence of intermolecular interactions in the nanocomposite was confirmed by Fourier transform infrared spectroscopy (FTIR) and UV-Visible spectroscopy. Experimental results showed that the nanocomposites’ optical bandgap decreased as the FVO concentration grew. The investigative values of the ε′, ε′′, and σac show notable differences in frequency. It is found that the values of the ε′ and ε′′ rise with frequency. It is shown that when the frequency increases, so does the σac. The σac value increased with frequency, reaching 4.14 × 10− 6 S·cm− 1 at 104 Hz from 5.42 × 10− 10 S·cm− 1 at 100 Hz. An increase in σac values is observed when the loading of FVO NPs is increased. Dielectric analyses showed that the CS/PVP/1.2%FVO nanocomposite sample had the best boost. Additionally, the energy density rose from 4.2 × 10− 7 J/m3 for CS/PVP to 1.35 × 10− 6 J/m3 for CS/PVP/1.2%FVO. The results show that the CS/PVP/FVO films can be used in energy storage applications because of their dielectric properties, which are successfully improved by increasing the FVO concentration.