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<p>In this study, Fe<sub>3</sub>O<sub>4</sub>@C@Cu<sub>2</sub>O was synthesized using a solvothermal method. The morphology and structural characteristics of the material were systematically investigated through various characterization techniques, including TEM, XPS, FT-IR, DLS, and VSM. Its antibacterial efficacy was assessed through colony counting. Results showed that at a concentration of 0.5&#xa0;mg/mL, Fe<sub>3</sub>O<sub>4</sub>@C@Cu<sub>2</sub>O nanoparticles with a copper atomic percentage of 2.42% achieved bactericidal rates of 98.45% against <i>E. coli</i> and 90.58% against <i>S. aureus</i>. Compared to pure Fe<sub>3</sub>O<sub>4</sub>@C and Cu<sub>2</sub>O, the composite material demonstrated a 100% bactericidal rate against <i>E. coli</i> and 99.23% against <i>S. aureus</i>. Notably, after five cycles, the composite nanoparticles maintained effective bactericidal rates, with 82.16% against <i>S. aureus</i> and 94.72% against <i>E. coli</i>. SEM images of bacterial morphology and EPR tests confirmed that the antibacterial mechanism primarily involves the generation of reactive oxygen species(ROS).</p>

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Recyclable Fe3O4@C@Cu2O as an efficient antimicrobial nanocomposites

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Ziyan Song,
  • Ruolong Ma,
  • Xiaodan Zheng,
  • Limeng Zhang,
  • Chuanda Ruan,
  • Xiaohui Yan,
  • Fei Tian

摘要

In this study, Fe3O4@C@Cu2O was synthesized using a solvothermal method. The morphology and structural characteristics of the material were systematically investigated through various characterization techniques, including TEM, XPS, FT-IR, DLS, and VSM. Its antibacterial efficacy was assessed through colony counting. Results showed that at a concentration of 0.5 mg/mL, Fe3O4@C@Cu2O nanoparticles with a copper atomic percentage of 2.42% achieved bactericidal rates of 98.45% against E. coli and 90.58% against S. aureus. Compared to pure Fe3O4@C and Cu2O, the composite material demonstrated a 100% bactericidal rate against E. coli and 99.23% against S. aureus. Notably, after five cycles, the composite nanoparticles maintained effective bactericidal rates, with 82.16% against S. aureus and 94.72% against E. coli. SEM images of bacterial morphology and EPR tests confirmed that the antibacterial mechanism primarily involves the generation of reactive oxygen species(ROS).