Synthesis of thick photocatalytic titania surface layers by solution plasma spraying and subsequent treatment by pulsed laminar plasma jet

Солоненко, О. П.; Ando, Yasutaka; Nishiyama, Hideya; Kindole, Dickson; Смирнов, А. В.; Golovin, A. A.; Uehara, Satoshi; Nakajima, Tetsuo

doi:10.1016/j.surfcoat.2017.10.064

Cited by 8 publications

(4 citation statements)

References 43 publications

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“…Recently, studies have shown the feasibility of the laminar plasma-spraying process [29][30][31][32][33][34][35][36][37][38][39]. Lower temperature and velocity gradient make the spraying process less sensitive to the spray distance, which means that, in a wider range of spray distance, the plasma properties are similar, and the particle statuses are also similar.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Effect of Carrier Gas Injection on the Laminarity of the Plasma Jet Generated by a Cascaded Spray Gun

et al. 2022

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In this work, the plasma generated by the cascaded SinplexProTM plasma spray gun was studied by means of numerical simulation. Special attention is given to the laminarity of the plasma flow. The simulation part is divided into two parts: arcing simulation inside the spray gun and plasma jet simulation outside the spray gun. A laminar as well as a turbulent model is used in each case. The results show that, under the investigated conditions, the internal flow of the plasma torch can be considered as laminar with low turbulence and can, hence, be regarded as quasi-laminar flow. If carrier gas is injected into the plasma jet, the ideal laminar plasma jet is often greatly affected. However, the turbulent plasma jet with low turbulence intensity generated by the cascaded SinplexProTM plasma spray gun is less affected and can remain stable, which is beneficial to the plasma-spraying process.

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Section: Introductionmentioning

confidence: 99%

Modeling of the Effect of Carrier Gas Injection on the Laminarity of the Plasma Jet Generated by a Cascaded Spray Gun

et al. 2022

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“…The final performance of coated materials designed for large‐scale applications such as photocatalysis, prosthesis, cell cultures, or dye‐sensitized solar cells may be greatly influenced by the physico‐chemical parameters of the respective coatings. For the deposition of mesoporous TiO 2 films with defined and homogeneous chemical composition and thickness on supports of interest various procedures such as PVD, sol–gel techniques, screen printing, dip, or spray coating can be employed 1–3 . In the present study, self‐assembly, layer‐by‐layer (LbL) deposition 4 of TiO 2 nanoparticles (NPs) was selected as a method to fabricate homogeneous mesoporous layers by alternating layers of oppositely charged/functionalized titania NPs based on (i) molecules ending with amino groups, either (3‐aminopropyl)triethoxysilane (“APTES”) or (3‐aminopropyl)phosphonic acid (“APPA”), and (ii) a cross‐linking agent, glutaraldehyde (“GA”), as reported in different recent studies in literature 5–9 .…”

Section: Introductionmentioning

confidence: 99%

“…A set of functionalized TiO 2 NPs has been produced by reaction with either (3-aminopropyl)triethoxysilane (APTES) or such as PVD, sol-gel techniques, screen printing, dip, or spray coating can be employed. [1][2][3] In the present study, self-assembly, layer-bylayer (LbL) deposition 4 of TiO 2 nanoparticles (NPs) was selected as a method to fabricate homogeneous mesoporous layers by alternating layers of oppositely charged/functionalized titania NPs based on (i) molecules ending with amino groups, either (3-aminopropyl) triethoxysilane ("APTES") or (3-aminopropyl)phosphonic acid ("APPA"), and (ii) a cross-linking agent, glutaraldehyde ("GA"), as reported in different recent studies in literature. [5][6][7][8][9] Hence, in a first step, the NPs should be functionalized with amino groups, which then, in a second step, can react with carbonyl group of GA; see Figure 1.…”

mentioning

confidence: 99%

Organic surface modification and analysis of titania nanoparticles for self‐assembly in multiple layers

Hodoroabă

Rades

Borghetti

et al. 2020

Surface & Interface Analysis

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The characteristics of TiO2 coatings can greatly influence their final performance in large‐scale applications. In the present study, self‐assembly of TiO2 nanoparticles (NPs) in multiple layers was selected as a deposition procedure on various substrates. For this, the main prerequisite constitutes the surface modification of both NPs and substrate with, for example, silane coupling agents. A set of functionalized TiO2 NPs has been produced by reaction with either (3‐aminopropyl)triethoxysilane (APTES) or (3‐aminopropyl)phosphonic acid (APPA) to functionalize the NP surface with free amino‐groups. Then, the complementary functionalized NP set can be obtained from an aliquot of the first one, through the conversion of free surface amino groups to aldehydes by reaction with glutaraldehyde (GA). Several types of TiO2 NPs differing in size, shape, and specific surface area have been functionalized. Fourier‐transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), SEM/ energy‐dispersive X‐ray spectroscopy (EDS), XPS, Auger electron spectroscopy (AES), and Time‐of‐Flight (ToF)‐SIMS analyses have been carried out to evaluate the degree of functionalization, all the analytical methods employed demonstrating successful functionalization of TiO2 NP surface with APTES or APPA and GA.

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“…21. This obtained relatively high porosity value is significantly higher than those of other sprayed photoreactive surfaces in the literature [166][167][168],…”

Section: Morphology Of Ag-tio2/fp Composite Coatingsmentioning

confidence: 57%

Development and application of functional composite surfaces with tunable wettability and photoreactivity

Mérai

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A fotoreaktív-, valamint az extrém és/vagy szabályozható nedvesedésű felületeket napjainkban fokozódó érdeklődés övezi. Doktori munkám során látható fényben aktív, plazmonikus Ag-TiO2 fotokatalizátor nanorészecskékből, poliakrilátokból és PDMS-ből kiindulva hoztam létre egyszerre mindkét említett funkcióval rendelkező kompozit felületeket. Ehhez kapcsolódóan bemutattam, hogy a vizsgált perfluorozott poliakrilátból (FP) készült hidrofób filmek nedvesedési karaktere Ag-TiO2 fotokatalizátor részecskékkel történő érdesítéssel fokozható. A kapott bevonatok Ag-TiO2/FP-arány az első említésnél függvényében változó felületi érdességgel és az érdességtől függő nedvesedéssel (és fotoreaktivitással) rendelkeztek a szuperhidrofiltől a szuperhidrofób karakterig terjedő tartományban. A szuperhidrofób nedvesedési karakter eléréséhez szükséges 80 m/m% fotokatalizátor-tartalom megtartása mellett a kompozitok nedvesedésére a mátrix összetétele is hatással volt: poli(2-hidroxietil-akrilát), mint hidrofil mátrixalkotó felhasználásával szuperhidrofil kompozit bevonatokat állítottam elő. Mivel a mikrofluidika és a folyadékmanipuláció térnyerésének köszönhetően egyre nagyobb igény mutatkozik új, stimulus-reszponzív nedvesedésű funkcionális felületek kialakítása iránt, ezért ennek fényében magneto-, illetve termoreszponzív nedvesedéssel és fotoreaktivitással rendelkező, PDMS-alapú kompozitokat is létrehoztam, karbonil vas mikrorészecskék és poli(N-izopropil-akrilamid) felhasználásával. Az extrém nedvesedésű, hierarchikus érdességel rendelkező felületek gyakorlati alkalmazásának egyik legnagyobb korlátja a felületi képletek sérülékenysége: ennek lehetséges kiküszöbölésére előállításra került egy PDMS-oleogél alapú öngyógyuló fotoreaktív kompozit is, mellyel tartós szuperhidrofób karakter érhető el. A disszertációmban bemutatott kompozit felületek a jövőben multifunkciós jellegükből fakadóan alkalmasak lehetnek például különböző polaritású szennyezők hatékony fotooxidációs eliminálására, vagy akár összetett folyadékmanipulációs feladatok elvégzésére is.

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Synthesis of thick photocatalytic titania surface layers by solution plasma spraying and subsequent treatment by pulsed laminar plasma jet

Cited by 8 publications

References 43 publications

Modeling of the Effect of Carrier Gas Injection on the Laminarity of the Plasma Jet Generated by a Cascaded Spray Gun

Modeling of the Effect of Carrier Gas Injection on the Laminarity of the Plasma Jet Generated by a Cascaded Spray Gun

Organic surface modification and analysis of titania nanoparticles for self‐assembly in multiple layers

Development and application of functional composite surfaces with tunable wettability and photoreactivity

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