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<p>Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes, characterized by their high specific surface area and expanded UV–Vis absorption spectrum, were successfully synthesized through a process of electrospinning followed by calcination. The diameters of Fe<sub>2</sub>O<sub>3</sub>/ZnO fibers are approximately 150 nm, and the specific surface areas of Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes are around 29 m<sup>2</sup>/g. XRD, SEM, and XPS results confirm the formation of a heterojunction between ZnO and α-Fe<sub>2</sub>O<sub>3</sub>. Compared with pure ZnO fiber membrane, the UV–Vis absorptions of the Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes are extended, and transient photocurrent intensities are significantly increased from 0.65 mA/cm<sup>2</sup> to 0.86&#xa0;mA/cm<sup>2</sup>. Free radical capture experiments further reveal the generation of abundant •OH radicals, which play a crucial role in enhancing the photocatalytic performance of these Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes. Optimization studies have determined that the optimal molar ratio of Fe to Zn is 8&#xa0;mol% in the Fe<sub>2</sub>O<sub>3</sub>/ZnO heterojunction, which corresponds to a 45% improvement in photocatalytic degradation efficiency for MB. Furthermore, the remarkable cycling stability of the Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes demonstrate their substantial potential for photocatalytic dye wastewater treatment.</p>

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Electrospun Fiber Membranes of Fe2O3/ZnO with High Photocatalytic Activity for Wastewater Treatment Application under Visible Light Irradiation

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Qing Lin,
  • Rui Zhang,
  • Xiujuan Zhang,
  • Shuang Li,
  • Junhao Dai,
  • Shuiping Li,
  • Zhao Wang,
  • Dong Liang,
  • Hailuo Fu,
  • Xiaojuan Zhang

摘要

Fe2O3/ZnO fiber membranes, characterized by their high specific surface area and expanded UV–Vis absorption spectrum, were successfully synthesized through a process of electrospinning followed by calcination. The diameters of Fe2O3/ZnO fibers are approximately 150 nm, and the specific surface areas of Fe2O3/ZnO fiber membranes are around 29 m2/g. XRD, SEM, and XPS results confirm the formation of a heterojunction between ZnO and α-Fe2O3. Compared with pure ZnO fiber membrane, the UV–Vis absorptions of the Fe2O3/ZnO fiber membranes are extended, and transient photocurrent intensities are significantly increased from 0.65 mA/cm2 to 0.86 mA/cm2. Free radical capture experiments further reveal the generation of abundant •OH radicals, which play a crucial role in enhancing the photocatalytic performance of these Fe2O3/ZnO fiber membranes. Optimization studies have determined that the optimal molar ratio of Fe to Zn is 8 mol% in the Fe2O3/ZnO heterojunction, which corresponds to a 45% improvement in photocatalytic degradation efficiency for MB. Furthermore, the remarkable cycling stability of the Fe2O3/ZnO fiber membranes demonstrate their substantial potential for photocatalytic dye wastewater treatment.