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<p>After the synthetization of silver Ag-decorated TiO<sub>2</sub> nanotubes, the adhesion of the coatings was enhanced with the increase in SILAR deposition cycles. The resulting coatings were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). XRD analysis confirmed that all TiO<sub>2</sub>-NTs crystallized in the anatase phase after annealing at 400&#xa0;°C. SEM images revealed a uniform distribution of vertically aligned TiO<sub>2</sub>-NTs on the substrate with a diameter of approximately 100&#xa0;nm with small Ag nanoparticles deposited on the walls of the nanotubes. The chemical composition of the samples results with the mapping and EDX spectra confirmed the successful decoration of TiO<sub>2</sub>-NTs surfaces with Ag nanoparticles with SILAR method at 12.4 wt% for 12 SILAR cycles. A wear mode was conducted to assess the wear resistance of the coatings. The results demonstrated that Ag-NPs decoration significantly improved interfacial adhesion, reducing the friction coefficient from 0.7 to 0.1 for TiO<sub>2</sub> decorated with 12 cycles-Ag-NPs. Multi-pass scratch tests indicated a reduction in wear volume with the incorporation of Ag nanoparticles. The energy dissipated (E) during testing was approximately 12.47&#xa0;J for pure TiO<sub>2</sub> nanotubes (NTs-TiO<sub>2</sub>). However, this value significantly decreased to just 1&#xa0;J after decoration with 8 cycles of silver nanoparticles. The electrochemical properties of the as-prepared samples were enhanced with the increase in Ag nanoparticles deposition, 12 SILAR cycles exhibited the highest corrosion resistance with strong <i>R</i><sub>ct</sub> = 13.5 Ω cm<sup>2</sup> compared to the other samples as well as low corrosion current <i>i</i><sub>0</sub> = 0.95 mA indicating an improved protective layer and low corrosion rate.</p>

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Effect of Surface Modification of TiO2 Nanotubes by Ag Nanoparticles Deposition with SILAR Method on Tribological and Anti-Wear Properties

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Ameni Rebhi,
  • Kawther Ben Mabrouk,
  • Syrine Sassi,
  • Jabeur ghozlani,
  • Hafedh Dhiflaoui,
  • Wissem Zayani,
  • Lotfi Khezami,
  • Anouar Hajjaji

摘要

After the synthetization of silver Ag-decorated TiO2 nanotubes, the adhesion of the coatings was enhanced with the increase in SILAR deposition cycles. The resulting coatings were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). XRD analysis confirmed that all TiO2-NTs crystallized in the anatase phase after annealing at 400 °C. SEM images revealed a uniform distribution of vertically aligned TiO2-NTs on the substrate with a diameter of approximately 100 nm with small Ag nanoparticles deposited on the walls of the nanotubes. The chemical composition of the samples results with the mapping and EDX spectra confirmed the successful decoration of TiO2-NTs surfaces with Ag nanoparticles with SILAR method at 12.4 wt% for 12 SILAR cycles. A wear mode was conducted to assess the wear resistance of the coatings. The results demonstrated that Ag-NPs decoration significantly improved interfacial adhesion, reducing the friction coefficient from 0.7 to 0.1 for TiO2 decorated with 12 cycles-Ag-NPs. Multi-pass scratch tests indicated a reduction in wear volume with the incorporation of Ag nanoparticles. The energy dissipated (E) during testing was approximately 12.47 J for pure TiO2 nanotubes (NTs-TiO2). However, this value significantly decreased to just 1 J after decoration with 8 cycles of silver nanoparticles. The electrochemical properties of the as-prepared samples were enhanced with the increase in Ag nanoparticles deposition, 12 SILAR cycles exhibited the highest corrosion resistance with strong Rct = 13.5 Ω cm2 compared to the other samples as well as low corrosion current i0 = 0.95 mA indicating an improved protective layer and low corrosion rate.