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<p>This study involves the synthesis of zinc oxide nanoparticles (ZnO-NPs) and their incorporation into polymethyl methacrylate (PMMA) to produce PMMA/ZnO-NPs nanocomposites. The nanocomposites are prepared using the solution casting method, with ZnO-NPs mass contents varying between 1% and 7%. X-ray diffraction (XRD) analysis revealed a hexagonal wurtzite structure for ZnO–NPs, which formed a phase-separated structures with the PMMA matrix. Scanning electron microscopy (SEM) images showed that ZnO-NPS were homogeneously distributed throughout the PMMA polymer matrix and higher ZnO-NPs content led to increased particle size and agglomeration. Fourier transform infrared (FTIR) confirmed ZnO integration. UV-Vis spectra indicated that ZnO-NPs influenced the optical properties of PMMA, with ZnO-NPs/PMMA 3% composite showing the highest absorption and good nanoparticle dispersion. Thermogravimetric analysis (TGA) indicated enhanced thermal stability, with composites showing a 12&#xa0;°C higher degradation temperature than pure PMMA. Photocatalytic performance was evaluated by degrading an azo dye (Acid Red) under UV light. Both ZnO–NPs and PMMA/ZnO-NPs composites achieved up to 99% dye removal at 10&#xa0;mg/L within 2&#xa0;h. According to the kinetic study, the photodegradation process followed pseudo-second-order model. Optimal dosages were 2.8&#xa0;g/L for ZnO–NPs and 2&#xa0;g/L for PMMA/ZnO-NPs composites. PMMA/ZnO-NPs composites demonstrated moderate recyclability over four cycles, making them suitable for sustainable water purification applications. This work highlights the potential of ZnO–NPs/PMMA as cost-effective, thermally stable, and efficient photocatalysts for environmental remediation.</p>

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Synthesis, characterization, and photocatalytic applications of ZnO nanoparticles-embedded PMMA nanocomposites for sustainable water purification

  • 期刊论文

  • 发表日期：

    2025年5月20日

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  • Hamoudi Belhoul,
  • Smail Terchi,
  • Naziha Ladjal,
  • Lamya Meftah,
  • Bahri Deghfel,
  • Abdelhalim Zoukel,
  • Ahmad Azmin Mohamad

摘要

This study involves the synthesis of zinc oxide nanoparticles (ZnO-NPs) and their incorporation into polymethyl methacrylate (PMMA) to produce PMMA/ZnO-NPs nanocomposites. The nanocomposites are prepared using the solution casting method, with ZnO-NPs mass contents varying between 1% and 7%. X-ray diffraction (XRD) analysis revealed a hexagonal wurtzite structure for ZnO–NPs, which formed a phase-separated structures with the PMMA matrix. Scanning electron microscopy (SEM) images showed that ZnO-NPS were homogeneously distributed throughout the PMMA polymer matrix and higher ZnO-NPs content led to increased particle size and agglomeration. Fourier transform infrared (FTIR) confirmed ZnO integration. UV-Vis spectra indicated that ZnO-NPs influenced the optical properties of PMMA, with ZnO-NPs/PMMA 3% composite showing the highest absorption and good nanoparticle dispersion. Thermogravimetric analysis (TGA) indicated enhanced thermal stability, with composites showing a 12 °C higher degradation temperature than pure PMMA. Photocatalytic performance was evaluated by degrading an azo dye (Acid Red) under UV light. Both ZnO–NPs and PMMA/ZnO-NPs composites achieved up to 99% dye removal at 10 mg/L within 2 h. According to the kinetic study, the photodegradation process followed pseudo-second-order model. Optimal dosages were 2.8 g/L for ZnO–NPs and 2 g/L for PMMA/ZnO-NPs composites. PMMA/ZnO-NPs composites demonstrated moderate recyclability over four cycles, making them suitable for sustainable water purification applications. This work highlights the potential of ZnO–NPs/PMMA as cost-effective, thermally stable, and efficient photocatalysts for environmental remediation.