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<p>In this work, zinc ferrite nanoparticle-modified tubular graphitic carbon nitride (ZnFe<sub>2</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>, ZFO/CN) was fabricated via an ultrasound-assisted self-assembly approach. The resulting ZFO/TCN composite features an optimized mesoporous structure, characterized by a specific surface area of 71.35 m<sup>2</sup>/g and average pore size of 10.32&#xa0;nm, with both values intermediate to those of the individual constituents. The composite exhibited significantly enhanced photocatalytic performance, degrading 93.5% of tetracycline (TC) within 1&#xa0;h and 98.7% of rhodamine B (RhB) within 20&#xa0;min. Moreover, the catalyst maintained high photocatalytic activity after four consecutive recycling experiments, demonstrating excellent reproducibility and stability. Free radical trapping experiments indicated that superoxide radicals (·O<sub>2</sub><sup>−</sup>) play a major role in the photocatalytic process. The energy band structure and charge transfer pathways of the catalyst were probed by solid-state ultraviolet diffuse reflectance spectroscopy (UV-Vis DRS) and Mott–Schottky measurements. The separation and transport efficiency of photogenerated charge carriers were systematically evaluated through transient photocurrent response and electrochemical impedance spectroscopy. Accordingly, a Z-scheme heterojunction structure was proposed for the ZFO/CN composite, along with a corresponding photocatalytic mechanism. This study offers new insights for the purification and treatment of wastewater.</p>

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Simulated Sunlight-Driven Photodegradation of Organic Pollutants Using 0D/1D ZnFe2O4/g-C3N4 Heterocatalysts

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • Jinsong Xie,
  • Haojie Zhang,
  • Yanxin Li,
  • Tianqi Liu,
  • Yaxin Du

摘要

In this work, zinc ferrite nanoparticle-modified tubular graphitic carbon nitride (ZnFe2O4/g-C3N4, ZFO/CN) was fabricated via an ultrasound-assisted self-assembly approach. The resulting ZFO/TCN composite features an optimized mesoporous structure, characterized by a specific surface area of 71.35 m2/g and average pore size of 10.32 nm, with both values intermediate to those of the individual constituents. The composite exhibited significantly enhanced photocatalytic performance, degrading 93.5% of tetracycline (TC) within 1 h and 98.7% of rhodamine B (RhB) within 20 min. Moreover, the catalyst maintained high photocatalytic activity after four consecutive recycling experiments, demonstrating excellent reproducibility and stability. Free radical trapping experiments indicated that superoxide radicals (·O2−) play a major role in the photocatalytic process. The energy band structure and charge transfer pathways of the catalyst were probed by solid-state ultraviolet diffuse reflectance spectroscopy (UV-Vis DRS) and Mott–Schottky measurements. The separation and transport efficiency of photogenerated charge carriers were systematically evaluated through transient photocurrent response and electrochemical impedance spectroscopy. Accordingly, a Z-scheme heterojunction structure was proposed for the ZFO/CN composite, along with a corresponding photocatalytic mechanism. This study offers new insights for the purification and treatment of wastewater.