Suspension plasma sprayed TiO2 coatings using different injectors and their photocatalytic properties

Kozerski, Stefan; Toma, Filofteia-Laura; Pawłowski, Lech; Leupolt, Beate; Łatka, Leszek; Berger, Lutz‐Michael

doi:10.1016/j.surfcoat.2010.04.068

Cited by 53 publications

(25 citation statements)

References 22 publications

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“…Several reports have demonstrated that nanometric ZrO 2 [17,18], TiO 2 [19][20][21] and Al 2 O 3 [22,23] are successfully deposited by SPS. The SPS coatings obtained using nanopowder feedstock exhibit superior characteristics due to the fact that they present a much lower porosity, leading to a denser structure.…”

Section: Introductionmentioning

confidence: 99%

A study of the influence of TiO2 addition in Al2O3 coatings sprayed by suspension plasma spray

Klyatskina

Rayón

Darut

et al. 2015

Surface and Coatings Technology

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Section: Introductionmentioning

confidence: 99%

A study of the influence of TiO2 addition in Al2O3 coatings sprayed by suspension plasma spray

Klyatskina

Rayón

Darut

et al. 2015

Surface and Coatings Technology

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“…This technique is known as Suspension Plasma Spraying (SPS) and differs significantly from conventional APS since the suspension is fragmented into droplets and the liquid phase vaporised before the solid feedstock is processed [24,25]. This novel technique has recently undergone an extensive development, leading to the deposition of nanostructured coatings with unique properties for solid oxide fuel cells (SOFC) functional layers [28,29], thermal barrier coatings [30,31], photocatalytic layers [32,33], wear resistant coatings [34] or bioactive layers [35].…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Bannier

Vicent

Rayón

et al. 2014

Applied Surface Science

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Versión / Versió:Preprint were used as starting materials. The coatings microstructure and phase composition were fully characterised using FEG-SEM and XRD techniques. Nanoindentation technique was used to determine the coatings hardness and elastic modulus properties.Results have shown that the addition of titania to alumina SPS coatings causes different crystalline phases and a higher powder melting rate is reached. The higher melted material achieved, when titania is added leads to higher hardness and elastic modulus when the same spraying parameters are used.

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“…In addition, Figure 12 evidences that coatings containing nearly 0% anatase also exhibited non-negligible photocatalytic activity. In fact, other authors have reported photocatalytic activity of plasma sprayed titania coatings mainly made up of rutile [7,35], although no justification for this behaviour has been put forward. Figure 12.…”

Section: Uv Irradiation Time (H) Mb Concentration (Ppm)mentioning

confidence: 99%

Preparation of feedstocks from nano/submicron-sized TiO 2 particles to obtain photocatalytic coatings by atmospheric plasma spraying

Bordes

Vicent

Moreno

et al. 2014

Ceramics International

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Cita bibliográfica / Cita bibliogràfica (ISO 690):BORDES, Mari Carmen, et al. Preparation of feedstocks from nano/submicron-sized TiO 2 particles to obtain photocatalytic coatings by atmospheric plasma spraying. Ceramics International, 2014, vol. 40, no 10, p. 16213-16225. AbstractAtmospheric plasma spraying (APS) has been proved useful in obtaining TiO 2 coatings with effective photocatalytic activity. However, the influence of feedstock characteristics on photocatalytic activity has hardly been addressed.This study was undertaken to prepare TiO 2 photocatalytic coatings by APS from different feedstocks. The feedstocks were obtained by spray drying suspensions of a nano-and a submicron-sized TiO 2 powder, with different solids contents and/or ratios of the nano-to submicron-sized particles. All the resulting powders were fully 2 characterised to assess their suitability for use in APS processes. Feedstock powders were then deposited on steel coupons by APS using hydrogen or helium as secondary plasma gas. Coating microstructure and phase composition were characterised. Coating photocatalytic activity was determined by measuring the degradation of methylene blue dye in an aqueous solution.Powder characterisation showed that all feedstocks met plasma spray operation requirements with regard to agglomerate size distribution and density, as well as to powder flowability. Optimum agglomerate density was obtained when a well-balanced mixture of nano-and submicron-sized particles was used.All coatings displayed a bimodal microstructure with partially melted agglomerates that retained the initial nano-or submicron-sized structure and composition (anatase phase) of the feedstock, surrounded by a fully melted matrix mainly formed by rutile. As expected, coating porosity as well as the amount of partially melted areas depended strongly on plasma spray conditions and on feedstock characteristics.With regard to photocatalytic activity, a reasonably good fit of a first-order kinetic model to the experimental data was found for all coatings. The kinetic constants obtained displayed higher values than those of a commercial sol-gel coating. The values of these constants were related to feedstock characteristics as well as to plasma spraying conditions on the basis of anatase content. The contribution of other factors to the resulting coating surface is also discussed.

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Suspension plasma sprayed TiO2 coatings using different injectors and their photocatalytic properties

Cited by 53 publications

References 22 publications

A study of the influence of TiO2 addition in Al2O3 coatings sprayed by suspension plasma spray

A study of the influence of TiO2 addition in Al2O3 coatings sprayed by suspension plasma spray

Effect of TiO 2 addition on the microstructure and nanomechanical properties of Al 2 O 3 Suspension Plasma Sprayed coatings

Preparation of feedstocks from nano/submicron-sized TiO 2 particles to obtain photocatalytic coatings by atmospheric plasma spraying

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