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<p>Nanocrystalline α-Fe<sub>2</sub>O<sub>3</sub> nanoparticles were successfully synthesized through a facile polyvinyl alcohol (PVA)-assisted combustion route, a relatively unexplored strategy for hematite preparation. Structural characterization using X-ray diffraction and Rietveld refinement confirmed the formation of phase-pure rhombohedral α-Fe<sub>2</sub>O<sub>3</sub> with high crystallinity. FESEM, EDX analyses revealed the formation of agglomerated nanoparticles with nanoscale dimensions and good elemental purity. Optical investigations demonstrated strong visible-light absorption indicating band gap in the visible range. Magnetic measurements revealed enhanced room-temperature magnetic behavior with a saturation magnetization of 13.1149 emu g⁻<sup>1</sup> which is attributed to nanoscale effects, uncompensated surface spins, and defect-induced magnetic interactions. The photocatalytic performance of the synthesized nanoparticles was evaluated through the visible-light-driven degradation of Acridine Orange (AO) dye, achieving nearly complete degradation (~ 99%) within 100&#xa0;min. The superior photocatalytic activity was ascribed to efficient visible-light harvesting, defect-assisted charge separation, and enhanced generation of reactive oxygen species responsible for the oxidative degradation of dye molecules. The remarkable degradation efficiency, combined with the magnetic and optical functionalities of the material, highlights the potential of PVA-derived α-Fe<sub>2</sub>O<sub>3</sub> nanoparticles as an environmentally benign and sustainable photocatalyst for wastewater treatment and environmental remediation applications.</p>

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PVA-engineered multifunctional α-Fe2O3 nanoparticles: enhanced magnetism and environmental remediation performance

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Khushboo Sharma,
  • Aisha Kabir Rather,
  • Sumit Singh,
  • Preteek Sharma,
  • Devinder Singh

摘要

Nanocrystalline α-Fe2O3 nanoparticles were successfully synthesized through a facile polyvinyl alcohol (PVA)-assisted combustion route, a relatively unexplored strategy for hematite preparation. Structural characterization using X-ray diffraction and Rietveld refinement confirmed the formation of phase-pure rhombohedral α-Fe2O3 with high crystallinity. FESEM, EDX analyses revealed the formation of agglomerated nanoparticles with nanoscale dimensions and good elemental purity. Optical investigations demonstrated strong visible-light absorption indicating band gap in the visible range. Magnetic measurements revealed enhanced room-temperature magnetic behavior with a saturation magnetization of 13.1149 emu g⁻1 which is attributed to nanoscale effects, uncompensated surface spins, and defect-induced magnetic interactions. The photocatalytic performance of the synthesized nanoparticles was evaluated through the visible-light-driven degradation of Acridine Orange (AO) dye, achieving nearly complete degradation (~ 99%) within 100 min. The superior photocatalytic activity was ascribed to efficient visible-light harvesting, defect-assisted charge separation, and enhanced generation of reactive oxygen species responsible for the oxidative degradation of dye molecules. The remarkable degradation efficiency, combined with the magnetic and optical functionalities of the material, highlights the potential of PVA-derived α-Fe2O3 nanoparticles as an environmentally benign and sustainable photocatalyst for wastewater treatment and environmental remediation applications.