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Multifunctional Core-Shell NiFe2O4 Shield with TiO2/rGO Nanostructures for Biomedical and Environmental Applications.

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|June 10, 2022
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Summary
This summary is machine-generated.

Novel multifunctional core@shell nanoparticles (NiFe2O4@TiO2@rGO) were synthesized for targeted applications. These nanoparticles exhibit tunable self-heating properties and effective antibacterial activity, alongside efficient sonophotocatalysis for TC degradation.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Development of multifunctional nanoparticles is crucial for advanced applications in medicine and environmental remediation.
  • Core-shell nanostructures offer unique properties by combining different materials.
  • The integration of magnetic (NiFe2O4), semiconductor (TiO2), and conductive (rGO) components can lead to synergistic effects.

Purpose of the Study:

  • To synthesize multifunctional NiFe2O4@TiO2@rGO core@shell nanoparticles.
  • To investigate their self-heating characteristics for potential hyperthermia applications.
  • To evaluate their antibacterial activity and sonophotocatalytic performance for pollutant degradation.

Main Methods:

  • Microwave irradiation synthesis of NiFe2O4 nanoparticles using plant extract.
  • Sol-gel method for coating TiO2 and reduced graphene oxide (rGO).
  • Characterization using XRD, Raman spectroscopy, HRTEM, SAED, and magnetic measurements.

Main Results:

  • Successful synthesis of NiFe2O4@TiO2@rGO core@shell nanostructures confirmed by XRD, Raman, and HRTEM.
  • Magnetic measurements showed ferromagnetic behavior with reduced saturation magnetization after coating.
  • Tunable self-heating properties (ΔT = 3-10°C, SAR = 3-58 W/g) and effective antibacterial activity against Gram-positive and Gram-negative bacteria were observed.
  • Efficient sonophotocatalytic degradation of TC was demonstrated.

Conclusions:

  • The fabricated NiFe2O4@TiO2@rGO nanoparticles are multifunctional, exhibiting promising self-heating capabilities close to hyperthermia thresholds.
  • The nanostructures demonstrate significant antibacterial efficacy and efficient sonophotocatalytic activity for TC degradation.
  • These findings highlight the potential of these core@shell nanoparticles for combined therapeutic and environmental applications.