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<p>Efficient and sustainable catalysts for oxygen evolution and antimicrobial applications are important for energy conversion and biomedical technologies. Here we show that interface-engineered Fe<sub>2</sub>O<sub>3</sub>-ZnO nanocomposites with ZnFe<sub>2</sub>O<sub>4</sub> bridges are explored as multifunctional applications. Fe<sub>2</sub>O<sub>3</sub> nanoparticles were synthesized via a <i>Bos taurus indicus</i> urine assisted-route and Fe<sub>2</sub>O<sub>3</sub>-ZnO (10-20 wt%Fe) composites by solvent-free solid-state reaction. XRD/Rietveld, FTIR/Raman, BET, SEM-EDS and XPS confirmed rhombohedral Fe<sub>2</sub>O<sub>3</sub>, wurtzite ZnO and interfacial ZnFe<sub>2</sub>O<sub>4</sub> with modified cation distribution. Fe<sub>2</sub>O<sub>3</sub> showed the best oxygen evolution performance, requiring 142 mV to reach 10 mA/cm<sup>2</sup> with a Tafel slope of 85 mV/dec, high electrochemically active surface area and low charge-transfer resistance. Density functional theory on α-Fe<sub>2</sub>O<sub>3</sub> (110) indicated balanced adsorption of *OH, *O and *OOH with *OH → *O as the potential-determining step. Antibacterial assays and anti-inflammatory tests revealed enhanced responses for the composites. This solvent-free strategy yields Fe<sub>2</sub>O<sub>3</sub>-ZnO-ZnFe<sub>2</sub>O<sub>4</sub> architectures that couple efficient alkaline OER with antimicrobial and anti-inflammatory activity.</p>

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Interface-engineered Fe2O3-ZnO nanocomposites with ZnFe2O4 spinel bridges for efficient OER and antimicrobial activity

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月28日

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  • Prashant D. Sarvalkar,
  • Nishigandha B. Chougale,
  • Dhanaji B. Malavekar,
  • Annasaheb V. Moholkar,
  • Neeraj R. Prasad,
  • Sanghyun Lee,
  • Suresh S. Suryawanshi,
  • Jin Hyeok Kim,
  • Sohdam Jeong,
  • Dongcheon Park,
  • Kwangwoo Wi

摘要

Efficient and sustainable catalysts for oxygen evolution and antimicrobial applications are important for energy conversion and biomedical technologies. Here we show that interface-engineered Fe2O3-ZnO nanocomposites with ZnFe2O4 bridges are explored as multifunctional applications. Fe2O3 nanoparticles were synthesized via a Bos taurus indicus urine assisted-route and Fe2O3-ZnO (10-20 wt%Fe) composites by solvent-free solid-state reaction. XRD/Rietveld, FTIR/Raman, BET, SEM-EDS and XPS confirmed rhombohedral Fe2O3, wurtzite ZnO and interfacial ZnFe2O4 with modified cation distribution. Fe2O3 showed the best oxygen evolution performance, requiring 142 mV to reach 10 mA/cm2 with a Tafel slope of 85 mV/dec, high electrochemically active surface area and low charge-transfer resistance. Density functional theory on α-Fe2O3 (110) indicated balanced adsorption of *OH, *O and *OOH with *OH → *O as the potential-determining step. Antibacterial assays and anti-inflammatory tests revealed enhanced responses for the composites. This solvent-free strategy yields Fe2O3-ZnO-ZnFe2O4 architectures that couple efficient alkaline OER with antimicrobial and anti-inflammatory activity.