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<p>A cost-effective semiconductor photocatalyst that harvests visible light energy and reduces photoinduced charge carrier recombination has garnered increasing interest for energy production and environmental cleanup. α-Fe<sub>2</sub>O<sub>3</sub>-tailored Bi<sub>2</sub>WO<sub>6</sub> hierarchical microspheres have been effectively synthesized and well characterized by XRD, SEM, EDAX, HR-XPS, PL, and UV–Vis DRS techniques. The photocatalytic efficacy was improved by the Fe-BW-3% heterostructure catalyst on the degradation of ciprofloxacin as an antibiotic and rhodamine B as a cationic dye pollutant, with percentages of 98.09% and 97.37%, respectively. The increased photocatalytic activity was attributed to the improved visible light harvesting ability and reduced rate of photoinduced electron–hole recombination by moving electrons from one junction to another. Furthermore, the recycle investigations revealed that the catalysts are stable for CIP and RhB degradation after six cycles. Furthermore, scavenging experiments show that holes were the primary reactive species while hydroxyl radicals were the secondary active species in the degradation of CIP and RhB. The Fe-BW-3% composite photocatalyst exhibited excellent hydrogen evolution performance, achieving a production rate of 846&#xa0;µmol. The enhancement mechanism was detailed with a schematic illustration.</p> Graphical Abstract <p></p>

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Engineered α-Fe2O3-tailored Bi2WO6 microspheres for synergistic photocatalytic pollutant degradation and hydrogen production

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • S. Krishnaveni,
  • R. Suja,
  • E. Annie Rathnakumari,
  • R. Marnadu,
  • Vasudeva Reddy Minnam Reddy,
  • Woo Kyoung Kim,
  • Mohamed Benghanem,
  • Mohd. Shkir,
  • A. Raja,
  • Vijayakumar Paranthaman

摘要

A cost-effective semiconductor photocatalyst that harvests visible light energy and reduces photoinduced charge carrier recombination has garnered increasing interest for energy production and environmental cleanup. α-Fe2O3-tailored Bi2WO6 hierarchical microspheres have been effectively synthesized and well characterized by XRD, SEM, EDAX, HR-XPS, PL, and UV–Vis DRS techniques. The photocatalytic efficacy was improved by the Fe-BW-3% heterostructure catalyst on the degradation of ciprofloxacin as an antibiotic and rhodamine B as a cationic dye pollutant, with percentages of 98.09% and 97.37%, respectively. The increased photocatalytic activity was attributed to the improved visible light harvesting ability and reduced rate of photoinduced electron–hole recombination by moving electrons from one junction to another. Furthermore, the recycle investigations revealed that the catalysts are stable for CIP and RhB degradation after six cycles. Furthermore, scavenging experiments show that holes were the primary reactive species while hydroxyl radicals were the secondary active species in the degradation of CIP and RhB. The Fe-BW-3% composite photocatalyst exhibited excellent hydrogen evolution performance, achieving a production rate of 846 µmol. The enhancement mechanism was detailed with a schematic illustration.

Graphical Abstract