Porous micro/nano structured oxidic titanium surface decorated with silicon monoxide

Křenek, Tomáš; Pola, J.; Docheva, Denitsa; Stich, Theresia; Fajgаr, Radek; Kovařík, Tomáš; Pola, Michal; Martan, J.; Moskal, D.; Jandová, Věra; Kupčı́k, Jaroslav; Mikysek, Petr

doi:10.1016/j.surfin.2021.101304

Cited by 7 publications

(5 citation statements)

References 75 publications

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“…This is not surprising considering the fact that the Ti oxidation process and oxide varieties are strongly dependent on the laser parameters. 60,61 TiO 2 coatings of the samples N1 and N5 are shown in Figure 3a, b, respectively. SEM images (obtained at a 45°angle after the samples were cut with a focused ion beam) and EDX maps of these samples show a clear border between the Ti microrelief and the TiO 2 nanocoating for both cases (indicated by white dashed lines in SEM images).…”

Section: Resultsmentioning

confidence: 99%

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation

Ponkratova,

Kuzmichev,

Rud

et al. 2024

ACS Appl. Nano Mater.

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The development of systems capable of efficiently eliminating organic dyes from wastewater is crucial for the environment. In this context, TiO2-based photocatalytic systems are of particular interest. However, the development of eco-friendly and single-step methods for the fabrication of such systems remains a challenge to their practical use. Here, we demonstrate a fabrication approach for a catalytic system composed of TiO2 nanocoating created on the surface of a bulk titanium plate by exposure to a nanosecond laser. The exposure conditions affect the relief and phase composition of the nanocoating, as revealed by a combination of scanning electron microscopy (SEM), contact profilometry, Raman, High-resolution X-ray photoelectron spectroscopy (HR XPS), and grazing incidence X-ray diffraction (GIXRD) methods. Using the GIXRD method, we establish that nanocoatings consist of a mixture of anatase and rutile grains with sizes of 22.7–24.4 and 29.8–32.2 nm, respectively. HR XPS analysis demonstrates that changes in the number of pulses per spot modify the anatase surface content from 40.6 to 70.4%. The samples with a higher anatase content exhibit up to 6.3 times higher catalytic activity, which is confirmed by methylene blue degradation when exposed to UV light and can be related to the synergistic effect of the anatase–rutile heterojunction. The reusability of the samples is supported by repeated degradation experiments. The photocatalytic activity of the obtained TiO2 nanocoatings is improved by Au nanoparticles deposited on their surface by magnetron sputtering. The proposed approach lays the foundation for the application of nanosecond laser-assisted technologies in the eco-friendly fabrication of catalytic systems.

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Section: Resultsmentioning

confidence: 99%

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation

Ponkratova,

Kuzmichev,

Rud

et al. 2024

ACS Appl. Nano Mater.

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“…After ablation, a thin remelted layer with a number of point defects and dislocations, produced by ultrafast cooling and shock wave, remains in the laser spot area [ 91 , 92 ]. The output laser-irradiated surface will be contaminated by precipitation of the ablated products and associated oxidation of the upper surface layers [ 93 , 94 , 95 , 96 ]. In most cases, the surface ablation process has a semi-thermal character (

).…”

Section: Physical Limitations Of Laser Surface Texturingmentioning

confidence: 99%

Scanning Strategies in Laser Surface Texturing: A Review

2023

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Laser surface texturing (LST) is one of the most promising technologies for controllable surface structuring and the acquisition of specific physical surface properties needed in functional surfaces. The quality and processing rate of the laser surface texturing strongly depend on the correct choice of a scanning strategy. In this paper, a comparative review of the classical and recently developed scanning strategies of laser surface texturing is presented. The main attention is paid to maximal processing rate, precision and existing physical limitations. Possible ways of further development of the laser scanning strategies are proposed.

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“…However, the applied laser oxidation has shown to produce mainly metastable, oxygen deficient titanium oxides which are not ideal for photocatalytic applications. [21] Short and ultrashort pulses are more promising for the production of active surfaces as they have shown to produce oxides with high active surface areas and can produce both, anatase and rutile depending on the used fluence. [22][23][24][25][26][27] In the experiments presented here, DLIP was applied at a pulse duration of 12 ps, since a higher amount of oxide is produced within this pulse regime than with even shorter pulses while the power density was still large enough to generate anatase.…”

Section: Introductionmentioning

confidence: 99%

“…In a recent approach relatively long pulse durations (200 ns) were used in combination with silicon monoxide particles to produce biocompatible surfaces that also showed some degree of photocatalytic activity. However, the applied laser oxidation has shown to produce mainly metastable, oxygen deficient titanium oxides which are not ideal for photocatalytic applications [21] . Short and ultrashort pulses are more promising for the production of active surfaces as they have shown to produce oxides with high active surface areas and can produce both, anatase and rutile depending on the used fluence [22–27] .…”

Section: Introductionmentioning

confidence: 99%

Single‐step Production of Photocatalytic Surfaces via Direct Laser Interference Patterning of Titanium

Fox,

Maria Delfino,

Cortés

et al. 2023

ChemNanoMat

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State of the art approaches to produce photocatalytic surfaces generally require multiple processing steps to achieve highly active surfaces. Following recent trends to facilitate the production of active surfaces, this work presents a single‐step method to create porous photocatalytic surfaces via direct laser interference patterning (DLIP) of a titanium substrate with pulses in the picosecond range. The resulting surfaces contain a variety of titanium oxides while both their composition and morphology can be controlled through the laser process parameters. This makes it possible to tailor these surfaces for specific applications such as antimicrobial surfaces, implant materials or water treatment. Surface characterization was executed by applying scanning electron microscopy complemented by focused ion beam cross‐sectioning and energy dispersive X‐ray spectroscopy as well as gracing incidence X‐ray diffractometry. The photocatalytic activity achieved by different laser parameters is assessed by methylene blue degradation under UV‐A light. As DLIP is already established in industrial applications, this approach could greatly facilitate the use of photocatalytic surfaces for water treatment or medical applications, as it does not require nanoparticle synthesis or additional coating steps.

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Porous micro/nano structured oxidic titanium surface decorated with silicon monoxide

Cited by 7 publications

References 75 publications

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation

Scanning Strategies in Laser Surface Texturing: A Review

Single‐step Production of Photocatalytic Surfaces via Direct Laser Interference Patterning of Titanium

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Porous micro/nano structured oxidic titanium surface decorated with silicon monoxide

Cited by 7 publications

References 75 publications

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO2 Nanocoatings: Implication in Organic Dyes Degradation

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO2 Nanocoatings: Implication in Organic Dyes Degradation

Scanning Strategies in Laser Surface Texturing: A Review

Single‐step Production of Photocatalytic Surfaces via Direct Laser Interference Patterning of Titanium

Contact Info

Product

Resources

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Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation

Nanosecond Laser-Assisted Fabrication of Photocatalytically Active TiO₂ Nanocoatings: Implication in Organic Dyes Degradation