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<p>Herein, the MOF-5/rGO@SrCuO<sub>2</sub> hybrid nanocomposite with a well-defined hybrid nanocomposite structure was successfully synthesized using the sonication method and used for the fabrication of polyvinylidene fluoride (PVDF) polymer composite films of different weight percentages (0, 0.5, 1.5, 3, and 5 wt%) of MOF-5/rGO@SrCuO<sub>2</sub>. Various characterization techniques such as X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL), UV-visible spectroscopy, and water contact angle analysis were used to analyze the structural, functional, morphological, and optical properties of the nanocomposite films. The results indicated filler concentration-dependent improvements in crystallinity, interfacial compatibility, and overall optical performance. The UV-blocking performance of the 5 wt% PVDF/MOF-5/rGO@SrCuO<sub>2</sub> composition was excellent, exhibiting strong absorption in the 220–315&#xa0;nm range in the UVC and UVB regions, with 96.97% UV blocking, a reduced optical bandgap from 4.51 to 3.13&#xa0;eV (direct allowed transition), and a low Urbach energy. This formulation also demonstrated a distinct shift in surface properties from hydrophilic to hydrophobic. Photoluminescence studies display a shift in emission from 425 to 410&#xa0;nm and increased emission with higher filler content, with emission intensity variations at higher loadings attributed to recombination processes. The Stokes shift indicates photonic down-conversion behavior. Incorporating the filler also improves refractive index and optical parameters, demonstrating a good optical response of the nanocomposite. Furthermore, enhancements were observed in both linear and nonlinear optical susceptibility measures, indicating high optical responsiveness. Overall, these findings demonstrate the nanocomposite’s exceptional structural integrity and multifunctional optical capabilities, emphasizing its potential for use in optoelectronic devices and effective UV-shielding applications.</p>

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Optical and photoluminescence performance in MOF-5/rGO@SrCuO2 hybrid nanocomposite filler embedded PVDF polymer nanocomposites

  • 期刊论文

  • 发表日期：

    2026年5月24日

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  • Indushree Veerananje,
  • Veda Bandigowdanahalli Prabhuswamy,
  • Bharath Kumar Sobandhar Prakash,
  • Chandana Naik,
  • Sanjay Ballur Prasanna,
  • Kumara Swamy Ningappa

摘要

Herein, the MOF-5/rGO@SrCuO2 hybrid nanocomposite with a well-defined hybrid nanocomposite structure was successfully synthesized using the sonication method and used for the fabrication of polyvinylidene fluoride (PVDF) polymer composite films of different weight percentages (0, 0.5, 1.5, 3, and 5 wt%) of MOF-5/rGO@SrCuO2. Various characterization techniques such as X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL), UV-visible spectroscopy, and water contact angle analysis were used to analyze the structural, functional, morphological, and optical properties of the nanocomposite films. The results indicated filler concentration-dependent improvements in crystallinity, interfacial compatibility, and overall optical performance. The UV-blocking performance of the 5 wt% PVDF/MOF-5/rGO@SrCuO2 composition was excellent, exhibiting strong absorption in the 220–315 nm range in the UVC and UVB regions, with 96.97% UV blocking, a reduced optical bandgap from 4.51 to 3.13 eV (direct allowed transition), and a low Urbach energy. This formulation also demonstrated a distinct shift in surface properties from hydrophilic to hydrophobic. Photoluminescence studies display a shift in emission from 425 to 410 nm and increased emission with higher filler content, with emission intensity variations at higher loadings attributed to recombination processes. The Stokes shift indicates photonic down-conversion behavior. Incorporating the filler also improves refractive index and optical parameters, demonstrating a good optical response of the nanocomposite. Furthermore, enhancements were observed in both linear and nonlinear optical susceptibility measures, indicating high optical responsiveness. Overall, these findings demonstrate the nanocomposite’s exceptional structural integrity and multifunctional optical capabilities, emphasizing its potential for use in optoelectronic devices and effective UV-shielding applications.