Thin film coating of photocatalytics on ultra light ceramic tile by use of supercritical fluid

Kato, Shigekazu; Katō, Susumu; Taoda, Hiroshi; Katoh, Shunsaku

doi:10.1080/08957950108206189

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…La técnica de deposición por inmersión (o en inglés Dip coating) basa su procedimiento en la inmersión total del sustrato en la solución, para luego ser removido a una velocidad controlada [20,21], bajo condiciones ambientales. Acorde con algunos investigadores es considerada como la técnica más fácil para depositar películas en la superficie de un sustrato, los cuales pueden ser tanto planos como curvos [11].…”

Section: Inmersión (Dip)unclassified

“…Aun cuando es un tema cuyos orígenes investigativos datan del año 2000 y encuentra un fuerte impulso entre los años 2007 en adelante, las investigaciones en otras funcionalidades parecen estar susceptibles de ser estudiadas dado que es posible recubrir los esmaltes con soluciones alcóxidicas mediante la técnica de solgel. [1]…”

Section: Conclusionesunclassified

“…El esmalte cerámico es la capa de naturaleza vítrea que se deposita sobre la superficie de diferentes sustratos, generalmente también de naturaleza cerámica, para proporcionar atributos estéticos y proteger la superficie gracias a sus propiedades físicas. Un campo amplio de aplicación de los esmaltes es en las baldosas cerámicas, usadas para pavimentos y revestimientos en el sector de la construcción [1,2]. En tal caso, en las baldosas se pueden reconocer por tres capas claramente definidas, ver Figura 1, que son: i) la pasta, que es la encargada de servir de soporte, es la que tiene el mayor espesor y cuerpo en la baldosa, ii) el engobe que es un revoque de arcilla que posibilita la unión entre el esmalte y la pasta, aproximadamente 100 a 200 µm, iii) el esmalte, el cual es una capa de muy baja porosidad, de aproximadamente 75 a 300 µm con las características mencionadas [3].…”

Section: Introductionunclassified

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Deposición de capas funcionales sobre esmaltes cerámicos mediante la técnica sol-gel (revisión)

Betancourt

Domínguez-Ortiz

Mosquera-Palacio

et al. 2018

ings

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Recibido : 16-11-2018, aprobado tras revisión: 13-12-2018 Forma sugerida de citación: Betancourt-Parra, S.; Domínguez-Ortiz, M. A.; Mosquera-Palacio, D. M.; Herrera-Guerra, J.; Ríos-Rendón, C. M. y Villa, C. E. (2019). «Deposición de capas funcionales sobre esmaltes cerámicos mediante la técnica sol-gel (revisión)». Ingenius. N. • 21, (enero-junio). pp. 9-20. doi: https://doi.org/10.17163/ings.n21.2019.01. Resumen AbstractPalabras clave: esmaltes cerámicos, esmaltes funcionales, sol-gel, cerámica.

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Section: Inmersión (Dip)unclassified

Section: Conclusionesunclassified

Section: Introductionunclassified

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Deposición de capas funcionales sobre esmaltes cerámicos mediante la técnica sol-gel (revisión)

Betancourt

Domínguez-Ortiz

Mosquera-Palacio

et al. 2018

ings

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“…For practical applications, it is necessary to deposit TiO 2 thin films on various solid substrates such as glass, ceramic tiles, and steel. There are several reports about the TiO 2 photocatalyst on glass 9,14-17 and ceramic tiles 18,19 to give the surface of these materials a self-cleaning effect utilizing the photocatalytic effect. Also, commercial products such as Activ glass produced by Pilkington Corp. are being used for building windows.…”

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Plasma-Enhanced ALD of TiO[sub 2] Thin Films on SUS 304 Stainless Steel for Photocatalytic Application

Lee¹,

Kim

Son³

et al. 2009

J. Electrochem. Soc.

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Plasma-enhanced atomic layer deposition ͑PE-ALD͒ of TiO 2 thin films using Ti͑NMe 2 ͒ 4 ͓tetrakis͑dimethylamido͒ Ti͔ and O 2 plasma were prepared on stainless steel to show the self-cleaning effect. The TiO 2 thin films deposited on stainless steel have high growth rate, large surface roughness, and low impurities. The film deposited below 200°C was amorphous, while the films deposited at 300 and 400°C showed anatase and rutile phases, respectively. The contact angle measurements on crystalline PE-ALD TiO 2 thin films exhibited superhydrophilicity after UV irradiation. The TiO 2 thin film with anatase phase deposited at 300°C showed the highest photocatalytic efficiency, which is higher than on Activ glass or thermal ALD TiO 2 films. We suggest that anatase structure and large surface area of TiO 2 thin film on stainless steel are the main factors for the high photocatalytic efficiency.Since photoinduced water splitting on titanium dioxide ͑TiO 2 ͒ electrode was discovered, 1 TiO 2 has been regarded as one of the most promising photocatalytic materials due to its high photocatalytic activity, high chemical stability, low toxicity, and low cost. As a photocatalyst, when UV light with higher energy than the bandgap of TiO 2 is illuminated, electron-hole pairs are generated in the TiO 2 films. The photogenerated holes in the valence band and the electrons in the conduction band diffuse to the TiO 2 surface and they produce highly energetic hydroxyl radicals ͑ • OH͒ and superoxide radical anions ͑O 2 •− ͒ which can oxidize organic molecules on the TiO 2 surface. 2-4 In addition, TiO 2 photocatalyst kills bacteria 5,6 and induces a hydrophilic surface after UV irradiation. 7,8 Thus, TiO 2 photocatalysts are widely used in various fields, such as window glass, ceramic tiles, and wall papers utilizing its self-cleaning, 9,10 antifogging, 7,8 antibacterial activities, 5,6 and water or air purification. 11,12 Two different tetragonal phases of TiO 2 , anatase and rutile, are commonly used in photocatalysis. The structures of both anatase and rutile consist of chains of TiO 6 octahedra, but lattice structures of two crystals are obviously different. 13 The differences in lattice structure cause different mass densities ͑3.894 g/cm 3 for anatase and 4.250 g/cm 3 for rutile͒ and electronic bandgaps ͑3.3 eV for anatase and 3.1 eV for rutile͒. The anatase phase has a more negative conduction bandedge potential ͑higher potential energy of photogenerated electrons͒ than the rutile phase, so it is well known that the photocatalytic activities of the anatase phase are superior to those of the rutile phase. 3 Thus, in terms of photocatalytic efficiency, obtaining a suitable crystalline phase and high specific area are important factors.For practical applications, it is necessary to deposit TiO 2 thin films on various solid substrates such as glass, ceramic tiles, and steel. There are several reports about the TiO 2 photocatalyst on glass 9,14-17 and ceramic tiles 18,19 to give the surface of these materials a self-cleaning effect u...

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Particle Formation Using Sub- and Supercritical Fluids

Knez

Škerget

Chen

et al. 2014

Supercritical Fluid Technology for Energy and Environmental Applications

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Thin film coating of photocatalytics on ultra light ceramic tile by use of supercritical fluid

Cited by 6 publications

References 2 publications

Deposición de capas funcionales sobre esmaltes cerámicos mediante la técnica sol-gel (revisión)

Deposición de capas funcionales sobre esmaltes cerámicos mediante la técnica sol-gel (revisión)

Plasma-Enhanced ALD of TiO[sub 2] Thin Films on SUS 304 Stainless Steel for Photocatalytic Application

Particle Formation Using Sub- and Supercritical Fluids

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