Sol-gel synthesis, characterization and properties of TiO2 and Ag-TiO2 coatings on titanium substrate

Titanium Dioxide Coatings Doubly-Doped with Ca and Ag Ions as Corrosion Resistant, Biocompatible, and Bioactive Materials for Medical Applications

“…Analogous observations were reported by X. Zhang et al [43]. While, some other researchers [24,35] reported opposite corrosion behavior of Ag-incorporated TiO 2 coatings-with an increased amount of silver content the corrosion resistance was improved. This tendency was; however, attributed to the fewer surface defects [35] or the presence of an Ag-TiO 2 nanocomposite [24].…”

“…While, some other researchers [24,35] reported opposite corrosion behavior of Agincorporated TiO2 coatings-with an increased amount of silver content the corrosion resistance was improved. This tendency was; however, attributed to the fewer surface defects [35] or the presence of an Ag-TiO2 nanocomposite [24]. Nevertheless, in terms of polarization resistance and corrosion rate, all our doubly-doped coatings act as corrosion protective-the samples with those coatings exhibit better corrosion resistance than the uncoated alloy substrate.…”

“…Our previous papers [20,21] also confirmed improved bioactivity of Ca-doped TiO 2 sol-gel coatings. It was also proved that, in an analogous manner, the antibacterial properties may be achieved by doping of bactericidal molecules that in most cases have antibacterial properties per se, namely Ag ions/nanoparticles [22][23][24], Cu ions [25,26], and Zn ions [27]. Several research studies [28][29][30] have shown that F doping enhances the antibacterial properties of TiO 2 too.…”

Mechanisms of the enhanced antibacterial effect of Ag-TiO2 coatings

“…In addition, TiO 2 with moderate hardness and excellent resistance to wear and corrosion can significantly accelerate osteoblast cell growth and improve bone-forming functionality and direct the fate of stem cells in orthopedic-associated implants (Frandsen et al 2013;. This suggests that a Ag-TiO 2 nanocomposite coating may offer a promising solution for improvement of the antibacterial properties of dental and orthopedic implants (Cotolan et al 2016;Gyorgyey et al 2016). It has been reported that Ag-TiO 2 nanocomposite coatings exhibit a synergistic effect on antibacterial activity, which made their bactericidal activities stronger than Ag or TiO 2 coatings (Ashkarran et al 2011;Esfandiari et al 2014;Motlagh et al 2014;Prakash et al 2016).…”

Preparation of Metal Coatings on Steel Balls Using Mechanical Coating Technique and Its Process Analysis

“…Other functions such as photocatalytic activity have also been found in metal/alloy coatings after certain treatments including thermal oxidation [7,8], chemical oxidation [9,10], plasma electrolytic oxidation [11,12], anodic oxidation [13,14], among others. In our published work, we prepared TiO 2 /Ti composite photocatalyst coatings on the substrate of Al 2 O 3 balls using mechanical coating followed by thermal oxidation [15].…”