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<p>The current study successfully synthesized nanocomposite films by incorporating various concentrations of Cd<sub>0.1</sub>Ni<sub>0.9</sub>Y<sub>0.05</sub>Fe<sub>1.95</sub>O<sub>4</sub> (CNYFO) into polyvinyl alcohol (PVA) using the solution casting technique. The impact of CNYFO spinel ferrite loading on the structure of PVA was examined using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR), optical microscopy (OM), and UV–vis spectroscopy. XRD and Raman analysis confirmed the successful synthesis of CNYFO nanoparticles in a cubic phase and revealed the reduction in the PVA’s semi-crystallinity as CNYFO content rises, indicating strong interfacial complexation of CNYFO NPs and the PVA chains. Adding CNYFO to the PVA causes a change in the absorption edge towards longer wavelengths. The optical bandgap values decreased from 5.527&#xa0;eV (pure PVA) to 4.171&#xa0;eV (PVA + 8%CNYFO) for direct transitions and from 4.692&#xa0;eV (pure PVA) to 2.262&#xa0;eV (PVA + 8%CNYFO) for indirect transitions. In contrast, the Urbach energy increased from 0.497&#xa0;eV to 3.736&#xa0;eV as the CNYFO concentration grew from 0 to 8%, respectively. Moreover, the refractive index of the pure PVA showed an enhancement after the inclusion of CNYFO NPs. The Wemple-DiDomenico model was employed to identify the essential optical parameters, like the refractive index and the dispersion energy, which were increased as the CNYFO concentration increased, signifying enhanced electronic polarizability and amorphous enrichment within the matrix. The Cd<sub>0.1</sub>Ni<sub>0.9</sub>Y<sub>0.05</sub>Fe<sub>1.95</sub>O<sub>4</sub> /PVA films with enhanced features are strongly nominated for optical applications.</p>

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Facile synthesis of Cd-Ni-Y spinel ferrite nanoparticles and their influence on the structural and optical characteristics of polyvinyl alcohol films

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Nawal Alghamdi,
  • Marwah A. Alsharif,
  • Maer Alanazi,
  • H. M. Abomostafa,
  • T. S. Soliman,
  • A. S. Abouhaswa,
  • Dalia E. Abulyazied

摘要

The current study successfully synthesized nanocomposite films by incorporating various concentrations of Cd0.1Ni0.9Y0.05Fe1.95O4 (CNYFO) into polyvinyl alcohol (PVA) using the solution casting technique. The impact of CNYFO spinel ferrite loading on the structure of PVA was examined using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR), optical microscopy (OM), and UV–vis spectroscopy. XRD and Raman analysis confirmed the successful synthesis of CNYFO nanoparticles in a cubic phase and revealed the reduction in the PVA’s semi-crystallinity as CNYFO content rises, indicating strong interfacial complexation of CNYFO NPs and the PVA chains. Adding CNYFO to the PVA causes a change in the absorption edge towards longer wavelengths. The optical bandgap values decreased from 5.527 eV (pure PVA) to 4.171 eV (PVA + 8%CNYFO) for direct transitions and from 4.692 eV (pure PVA) to 2.262 eV (PVA + 8%CNYFO) for indirect transitions. In contrast, the Urbach energy increased from 0.497 eV to 3.736 eV as the CNYFO concentration grew from 0 to 8%, respectively. Moreover, the refractive index of the pure PVA showed an enhancement after the inclusion of CNYFO NPs. The Wemple-DiDomenico model was employed to identify the essential optical parameters, like the refractive index and the dispersion energy, which were increased as the CNYFO concentration increased, signifying enhanced electronic polarizability and amorphous enrichment within the matrix. The Cd0.1Ni0.9Y0.05Fe1.95O4 /PVA films with enhanced features are strongly nominated for optical applications.