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<p>CeO<sub>2</sub> incorporated Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> ternary nanocomposites (Ce@AT) were synthesized via co-precipitation and incorporated into epoxy coatings on metal substrates. Comprehensive characterization by XRD, Raman spectroscopy, FE-SEM, XPS and TEM confirmed the formation of a phase pure ternary CeO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> nanocomposite with strong Ce-O-Al and Ce-O-Ti interfacial bonding. Among all compositions, EP-1.0%Ce@AT exhibited the best overall performance with a hydrophobic water contact angle of 102.1°, excellent salt spray resistance beyond 288&#xa0;h and high electrochemical barrier properties maintained over 60 days of immersion in 3.5 wt% NaCl solution. ICP-OES confirmed negligible leaching of constituent ions, establishing the chemical stability and environmental safety of the coating. Furthermore, 1.0%Ce@AT demonstrated notable antibacterial activity against ESBL producing <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> surpassing the streptomycin standard against <i>E. coli</i>. The 1.0%CeO<sub>2</sub> content is identified as optimal, delivering a synergistic combination of corrosion barrier performance, surface hydrophobicity, long term durability and antimicrobial efficacy for multifunctional metal substrate protection.</p>

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CeO2 Incorporated Al2O3-TiO2 Ternary Multifunctional Nanocomposite Reinforced Epoxy Coatings for Metal Substrates with Antibacterial Activity

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Kotturana Kottige Parmesh Pavan Kumar,
  • Konanuru Narasimhamurthy Mukunda Murthy,
  • Gowdagere Ravinandana Deepak Raj,
  • Murudagalli Basavaraju Shivaswamy,
  • Nagarajappa Vidya,
  • Madanahalli Ankanathappa Sangamesha,
  • Agasanapura Puttaswamy Ananda,
  • Honnegowdanahalli Shivabasappa Nagendra Prasad

摘要

CeO2 incorporated Al2O3-TiO2 ternary nanocomposites (Ce@AT) were synthesized via co-precipitation and incorporated into epoxy coatings on metal substrates. Comprehensive characterization by XRD, Raman spectroscopy, FE-SEM, XPS and TEM confirmed the formation of a phase pure ternary CeO2-Al2O3-TiO2 nanocomposite with strong Ce-O-Al and Ce-O-Ti interfacial bonding. Among all compositions, EP-1.0%Ce@AT exhibited the best overall performance with a hydrophobic water contact angle of 102.1°, excellent salt spray resistance beyond 288 h and high electrochemical barrier properties maintained over 60 days of immersion in 3.5 wt% NaCl solution. ICP-OES confirmed negligible leaching of constituent ions, establishing the chemical stability and environmental safety of the coating. Furthermore, 1.0%Ce@AT demonstrated notable antibacterial activity against ESBL producing Staphylococcus aureus and Escherichia coli surpassing the streptomycin standard against E. coli. The 1.0%CeO2 content is identified as optimal, delivering a synergistic combination of corrosion barrier performance, surface hydrophobicity, long term durability and antimicrobial efficacy for multifunctional metal substrate protection.