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<p>This work aims to produce a nanocomposite (NC) of CdS/ZrO<sub>2</sub>-filled chitosan-polyvinyl pyrrolidone-polyvinyl alcohol (CS-PVP-PVA) via solution casting, representing a novel combination of these materials for dual optical and radiation shielding applications. The morphology was examined using SEM, EDX, and optical microscopy, while optical properties were analyzed via UV–visible spectrophotometry. The direct optical bandgap decreased from 4.91 to 1.08&#xa0;eV upon 10 wt % CdS/ZrO<sub>2</sub> loading, and the refractive index improved by ~ 58% (from 1.743 to 2.758). The gamma-ray shielding characteristics of all films were assessed using the Phy-X program. At 0.02&#xa0;MeV, the linear attenuation coefficient rose from 0.7093 to 6.63111&#xa0;cm⁻<sup>1</sup>, and the radiation protection efficiency reached 99.9% for the 10 wt % CdS/ZrO<sub>2</sub>-filled film. The mean free path (MFP) of the CS-PVP-PVA medium reduced to 0.151&#xa0;cm due to 10% CdS/ZrO<sub>2</sub> loading compared to 1.41&#xa0;cm. These findings highlight the significant role of CdS/ZrO<sub>2</sub> NC in reinforcing the optical and gamma-ray shielding efficiency of CS-PVP-PVA medium for medical and industrial applications.</p>

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Synergism in optical/radiation shielding features of nano-CdS/ZrO2-filled chitosan-polyvinyl pyrrolidone-polyvinyl alcohol film

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Ali Badawi,
  • Sami S. Alharthi

摘要

This work aims to produce a nanocomposite (NC) of CdS/ZrO2-filled chitosan-polyvinyl pyrrolidone-polyvinyl alcohol (CS-PVP-PVA) via solution casting, representing a novel combination of these materials for dual optical and radiation shielding applications. The morphology was examined using SEM, EDX, and optical microscopy, while optical properties were analyzed via UV–visible spectrophotometry. The direct optical bandgap decreased from 4.91 to 1.08 eV upon 10 wt % CdS/ZrO2 loading, and the refractive index improved by ~ 58% (from 1.743 to 2.758). The gamma-ray shielding characteristics of all films were assessed using the Phy-X program. At 0.02 MeV, the linear attenuation coefficient rose from 0.7093 to 6.63111 cm⁻1, and the radiation protection efficiency reached 99.9% for the 10 wt % CdS/ZrO2-filled film. The mean free path (MFP) of the CS-PVP-PVA medium reduced to 0.151 cm due to 10% CdS/ZrO2 loading compared to 1.41 cm. These findings highlight the significant role of CdS/ZrO2 NC in reinforcing the optical and gamma-ray shielding efficiency of CS-PVP-PVA medium for medical and industrial applications.