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<p>Particulate matter and gas pollutants usually coexist in the air. In this study, electrospun polyacrylonitrile nanofibers coated with a α-Fe<sub>2</sub>O<sub>3</sub>/MgO@g-C<sub>3</sub>N<sub>4</sub> ternary photocatalyst were fabricated and used for particle filtration as well as photocatalytic oxidation of toluene in air under visible light. The α-Fe<sub>2</sub>O<sub>3</sub>/MgO@g-C<sub>3</sub>N<sub>4</sub> catalyst was added to 12% PAN solutions at 5, 10, 30, and 50 wt%. The filtration performance of the nanofibers was investigated using 0.3&#xa0;μm KCl particles, with face velocities maintained at 5 and 10&#xa0;cm/s. Additionally, photocatalytic removal of toluene was evaluated under visible-light LED irradiation. Both the filtration efficiency and the pressure drop exhibited a gradual increase with increasing nanocatalyst loading on the nanofibers. PAN 50% FG@MgO exhibited excellent efficiency, about 99.30 and 97.25% at face velocities of 5 and 10&#xa0;cm/s, respectively. The highest quality factor was related to PAN-30% FG@MgO. The toluene degradation rate was also higher with increasing percentage of catalysts in the samples. In PAN 50% FG@MgO, the degradation efficiency was about 48.3% after 55&#xa0;min and showed superior stability with a kinetic rate constant of 0.0385&#xa0;min<sup>−1</sup>, nearly four times lower than pure PAN, highlighting its durability. The FG@MgO-PAN nanofibers are an innovative, environmentally friendly solution for air pollution treatment in real environments.</p> Graphical Abstract <p></p>

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A Novel Polyacrylonitrile-α-Fe2O3/MgO@g-C3N4 Nanofiber for High Air Filtration Efficiency and Photocatalytic Degradation of Toluene Under Visible Light

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Farshid Ghorbani Shahna,
  • Rezvan Abedinloo,
  • Abdulrahman Bahrami,
  • Majid Habibi Mohraz,
  • Saeid Azizian,
  • Maryam Farhadian

摘要

Particulate matter and gas pollutants usually coexist in the air. In this study, electrospun polyacrylonitrile nanofibers coated with a α-Fe2O3/MgO@g-C3N4 ternary photocatalyst were fabricated and used for particle filtration as well as photocatalytic oxidation of toluene in air under visible light. The α-Fe2O3/MgO@g-C3N4 catalyst was added to 12% PAN solutions at 5, 10, 30, and 50 wt%. The filtration performance of the nanofibers was investigated using 0.3 μm KCl particles, with face velocities maintained at 5 and 10 cm/s. Additionally, photocatalytic removal of toluene was evaluated under visible-light LED irradiation. Both the filtration efficiency and the pressure drop exhibited a gradual increase with increasing nanocatalyst loading on the nanofibers. PAN 50% FG@MgO exhibited excellent efficiency, about 99.30 and 97.25% at face velocities of 5 and 10 cm/s, respectively. The highest quality factor was related to PAN-30% FG@MgO. The toluene degradation rate was also higher with increasing percentage of catalysts in the samples. In PAN 50% FG@MgO, the degradation efficiency was about 48.3% after 55 min and showed superior stability with a kinetic rate constant of 0.0385 min−1, nearly four times lower than pure PAN, highlighting its durability. The FG@MgO-PAN nanofibers are an innovative, environmentally friendly solution for air pollution treatment in real environments.

Graphical Abstract