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<p>In this study, Fe<sub>2</sub>O<sub>3</sub> and Pt nanoparticles (NPs) were successfully co-decorated onto TiO<sub>2</sub> nanowire arrays (NWs) to construct Fe<sub>2</sub>O<sub>3</sub>/Pt/TiO<sub>2</sub> NW composites with photo-Fenton-like cascade catalytic activity, using a combination of the sol–gel and light irradiation methods. A highly uniform anatase structure was obtained, with the average diameter of the NWs ranging from 20 to 70&#xa0;nm. The optical properties of the composites were significantly altered by the co-decoration with Pt and Fe<sub>2</sub>O<sub>3</sub> NPs, as evidenced by a slight shift in bandgap energy from 3.33 to 3.21&#xa0;eV compared to pristine TiO<sub>2</sub> NWs. The photocatalytic activity was investigated by examining the decomposition of norfloxacin (NOR) antibiotic under light irradiation. A photodegradation efficiency of 87.92% was achieved at 10&#xa0;ml L<sup>−1</sup> H<sub>2</sub>O<sub>2</sub> dosage after 120&#xa0;min, representing a 1.69-fold improvement over pristine TiO<sub>2</sub> NWs. This enhancement was attributed to the improved generation and separation of photo-induced charge carriers, suppressed electron–hole recombination, extended light absorption into the visible range, and the contribution of the Fe<sub>2</sub>O<sub>3</sub>-induced photo-Fenton-like cascade process. The formation of heterojunctions among the components was also believed to facilitate more efficient charge transfer. The Fe<sub>2</sub>O<sub>3</sub>/Pt/TiO<sub>2</sub> NW composites are considered promising photocatalysts for environmental remediation, particularly for the solar-driven removal of persistent pharmaceutical contaminants.</p> Graphical Abstract

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Facile Synthesis of Fe2O3/Pt/TiO2 Nanowire Arrays Composite for Photo-Fenton-Like Degradation of Antibiotics Norfloxacin

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Van Manh Nguyen,
  • Thuy Trang Dang,
  • Thi Mai Huong Pham,
  • Xuan Huy Nguyen,
  • The Huu Nguyen

摘要

In this study, Fe2O3 and Pt nanoparticles (NPs) were successfully co-decorated onto TiO2 nanowire arrays (NWs) to construct Fe2O3/Pt/TiO2 NW composites with photo-Fenton-like cascade catalytic activity, using a combination of the sol–gel and light irradiation methods. A highly uniform anatase structure was obtained, with the average diameter of the NWs ranging from 20 to 70 nm. The optical properties of the composites were significantly altered by the co-decoration with Pt and Fe2O3 NPs, as evidenced by a slight shift in bandgap energy from 3.33 to 3.21 eV compared to pristine TiO2 NWs. The photocatalytic activity was investigated by examining the decomposition of norfloxacin (NOR) antibiotic under light irradiation. A photodegradation efficiency of 87.92% was achieved at 10 ml L−1 H2O2 dosage after 120 min, representing a 1.69-fold improvement over pristine TiO2 NWs. This enhancement was attributed to the improved generation and separation of photo-induced charge carriers, suppressed electron–hole recombination, extended light absorption into the visible range, and the contribution of the Fe2O3-induced photo-Fenton-like cascade process. The formation of heterojunctions among the components was also believed to facilitate more efficient charge transfer. The Fe2O3/Pt/TiO2 NW composites are considered promising photocatalysts for environmental remediation, particularly for the solar-driven removal of persistent pharmaceutical contaminants.

Graphical Abstract