Enhanced photoactive and photoelectrochemical properties of TiO2 sol–gel coated steel by the application of SiO2 intermediate layer

Nikkanen, Juha-Pekka; Huttunen-Saarivirta, Elina; Salminen, Turkka; Hyvärinen, Leo; Honkanen, Mari; Isotahdon, Elisa; Heinonen, Saara; Levänen, Erkki

doi:10.1016/j.apcatb.2015.03.014

Cited by 8 publications

(6 citation statements)

References 60 publications

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“…Various processes have been used to produce photocatalytic TiO 2 coatings. Traditional methods include physical/chemical vapor deposition and sol-gel techniques (Ref 267 , 268 ). Thermal spray processes have been explored due to their fast deposition rates, flexibility on powder and substrate selection, and capability of coating large surfaces (Ref 262 , 269 - 272 ).…”

Section: Cold Spray Application Pillars (Past Present and Future)mentioning

confidence: 99%

Cold Spray: Over 30 Years of Development Toward a Hot Future

et al. 2022

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Cold Spray (CS) is a deposition process, part of the thermal spray family. In this method, powder particles are accelerated at supersonic speed within a nozzle; impacts against a substrate material triggers a complex process, ultimately leading to consolidation and bonding. CS, in its modern form, has been around for approximately 30 years and has undergone through exciting and unprecedented developmental steps. In this article, we have summarized the key inventions and sub-inventions which pioneered the innovation aspect to the process that is known today, and the key breakthroughs related to the processing of materials CS is currently mastering. CS has not followed a liner path since its invention, but an evolution more similar to a hype cycle: high initial growth of expectations, followed by a decrease in interest and a renewed thrust pushed by a number of demonstrated industrial applications. The process interest is expected to continue (gently) to grow, alongside with further development of equipment and feedstock materials specific for CS processing. A number of current applications have been identified the areas that the process is likely to be the most disruptive in the medium-long term future have been laid down.

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Section: Cold Spray Application Pillars (Past Present and Future)mentioning

confidence: 99%

Cold Spray: Over 30 Years of Development Toward a Hot Future

et al. 2022

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“…The representative SEM images in Figure 1 evidence the superficial line patterns associated with SiC paper abrasion during preparation of the metal substrates. Despite this, all four types of films appeared to have a crack-free, homogeneous and compact structure, features that are required for their use as photoanodes since they favor their stability and increase corrosion resistance of the metal substrate 25,26,28,29 . Additionally, AFM images obtained for the films in contact mode (20 μm × 20 μm area) are shown in Figure 2.…”

Section: Characterization Of the Photocatalyst Filmsmentioning

confidence: 99%

N and F Codoped TiO2 Thin Films on Stainless Steel for Photoelectrocatalytic Removal of Cyanide Ions in Aqueous Solutions

et al. 2017

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N-F codoped TiO 2 films were immobilized on stainless steel sheets through a combined approach involving a dip-coating technique and a hydrothermal treatment, followed by calcination at 400°C in the presence of air. Photocatalyst characterization was conducted using XRD, Raman and UV-VIS spectroscopy as well as SEM. The films were tested in a three-electrode cell for the photoelectrocatalytic degradation of CN-containing compounds. The results showed that the increase in the degradation rate of CN-containing compounds is both influenced by a synergistic effect of the doping agents and strongly dependent on the concentration of CN-containing compounds in the solution. Nitrogen contributed to the enhanced photoactivity under visible light due to the generation of localized states within the band gap of TiO 2 , whereas the presence of fluoride improved the superficial properties of the film, which resulted in higher amounts of CN-containing compounds that were degraded by direct charge transfer through the photogenerated holes.

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“…ARG fabric is coated by a silica (SiO 2 ) nano-layer through the sol-gel deposition procedure (see Signorini et al 14 and Nikkanen et al 18 ). Tetraethyl orthosilicate (98%, Sigma Aldrich Inc.) is adopted as precursor for the acid-catalysed colloidal solution (sol).…”

Section: Silica Gel Nano-coatingmentioning

confidence: 99%

Sustainable mineral coating of alkali-resistant glass fibres in textile-reinforced mortar composites for structural purposes

Signorini¹,

Nobili

Siligardi

2019

Journal of Composite Materials

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The mechanical performance of a silica-based mineral nano-coating applied to alkali-resistant glass textile-reinforced composite materials aimed at structural strengthening is investigated experimentally. The silica nano-film is directly applied to the alkali-resistant glass fabric by sol–gel deposition. Two lime mortars are adopted as embedding matrix, which differ by the ultimate compressive strength and elongation. Uni-axial tensile tests of prismatic coupons are carried out according to the ICC AC434 guidelines. Remarkable strength and ductility enhancements could be observed in the silica-coated group, as compared to the uncoated group, for both mortar types. Digital image correlation, electron scanning and optical microscopy provide evidence of improved interphase strength. X-ray diffraction of the anhydrous mortars brings out the role of the mineralogical composition of the embedding media on the overall bonding properties of the composites. Consideration of design limits and energy dissipation capabilities reveals the crucial role of matrix ductility in bringing the contribution of interphase enhancement to full effect. We conclude that best performance requires optimizing the pairing between fabric-to-matrix adhesion and matrix ductility.

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Enhanced photoactive and photoelectrochemical properties of TiO2 sol–gel coated steel by the application of SiO2 intermediate layer

Cited by 8 publications

References 60 publications

Cold Spray: Over 30 Years of Development Toward a Hot Future

Cold Spray: Over 30 Years of Development Toward a Hot Future

N and F Codoped TiO2 Thin Films on Stainless Steel for Photoelectrocatalytic Removal of Cyanide Ions in Aqueous Solutions

Sustainable mineral coating of alkali-resistant glass fibres in textile-reinforced mortar composites for structural purposes

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