Zinc-Doped Ferrite Nanoparticles Show Promise in Removing Tetracycline Antibiotic Under Visible-Light Irradiation

Strategic Insights -

A recent study published in Reaction Kinetics, Mechanisms and Catalysis has demonstrated the efficacy of zinc-doped ferrite nanoparticles in degrading tetracycline antibiotic under visible-light irradiation. The research, conducted by a team of scientists from Bahauddin Zakariya University, showed that the zinc-doped catalyst achieved 98% tetracycline degradation compared to 50% for the undoped material. The study also highlighted the broad-spectrum activity of the catalyst, with degradation efficiencies of 85, 77, 65, and 48% for Congo Red, Rhodamine B, Methylene Blue, and Methyl Orange, respectively.

Key Takeaways:

  • The zinc-doped ferrite nanoparticles were synthesized via the sol-gel auto-combustion method and characterized by XRD, FTIR, SEM, EDX, BET, and UV-Vis spectroscopy.
  • Zinc incorporation at x = 0.2 reduced the optical bandgap from 2.86 eV to 2.69 eV, increased BET surface area from 7.54 to 10.23 m2/g (35.6% enhancement), and decreased crystallite size from 22.26 to 18.82 nm.
  • The zinc-doped catalyst achieved 98% tetracycline degradation under visible-light irradiation, compared to 50% for the undoped material.
  • The catalyst demonstrated broad-spectrum activity, with degradation efficiencies of 85, 77, 65, and 48% for Congo Red, Rhodamine B, Methylene Blue, and Methyl Orange, respectively.
  • The addition of peroxymonosulfate, hydrogen peroxide, and persulfate resulted in complete tetracycline removal at 15, 30, and 45 min, respectively.
  • Hydroxyl radicals were identified as the primary degradation species, contributing to 63% of the overall process.
  • The catalyst maintained an 82% efficiency after five consecutive cycles.

Statistics:

  • 98% tetracycline degradation achieved under visible-light irradiation
  • 35.6% enhancement in BET surface area after zinc incorporation
  • 2.86 eV to 2.69 eV reduction in optical bandgap
  • 22.26 to 18.82 nm decrease in crystallite size
  • 85, 77, 65, and 48% degradation efficiencies for Congo Red, Rhodamine B, Methylene Blue, and Methyl Orange, respectively
  • 15, 30, and 45 min time frames for complete tetracycline removal with peroxymonosulfate, hydrogen peroxide, and persulfate, respectively
  • 63% contribution of hydroxyl radicals to the overall degradation process
  • 82% efficiency maintained after five consecutive cycles

Sources:

  • Reaction Kinetics, Mechanisms and Catalysis, "Mechanistic Insights and Management Approaches In Photocatalytic Degradation of Tetracycline Antibiotic Using Zinc Ferrite Nanoparticles," 2025.
  • NewsRx, "Reports Outline Nanoparticles Study Findings from Bahauddin Zakariya University (Mechanistic Insights and Management Approaches In Photocatalytic Degradation of Tetracycline Antibiotic Using Zinc Ferrite Nanoparticles)," August 24, 2025.