Multilayer TiO2/SiO2 thin sol–gel films: Effect of calcination temperature and Na+ diffusion

Zita, J.; Maixner, J.; Krýsa, Josef

doi:10.1016/j.jphotochem.2010.07.030

Cited by 28 publications

(16 citation statements)

References 32 publications

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“…The above observations indicate that the obtained TiO 2 thin film has the prospect of being large-scale applied on window glass for air purification under sunlight. [19,20]. However, beyond that, based on the results in this research, we have found that there is another important reason which is also responsible for the poor crystallinity of the TiO 2 thin film fabricated on soda-lime glass through the traditional sol-gel method (without PVP), that is the small sized Ti-O-Ti networks existing in titania sol.…”

Section: The Optical Transmittances the Photocatalytic Stabilities Amentioning

confidence: 62%

“…Among them, sol-gel process is the most prevailing one because it's operated at mild conditions and can be easily scaled up to fabricate large-sized TiO 2 thin film [18]. However, it has been reported that the TiO 2 thin film fabricated on window glass via the traditional sol-gel method had very low photocatalytic activity [3,[19][20][21], hindering its practical application. Because usually the obtained TiO 2 thin film on window glass has poor crystallinity, which is caused by the thermal diffusion of sodium ions from glass substrate into TiO 2 thin film during calcination [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Facile process to greatly improve the photocatalytic activity of the TiO 2 thin film on window glass for the photodegradation of acetone and benzene

Xie

Baoshun

Zhao

2016

Chemical Engineering Journal

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Section: The Optical Transmittances the Photocatalytic Stabilities Amentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Facile process to greatly improve the photocatalytic activity of the TiO 2 thin film on window glass for the photodegradation of acetone and benzene

Xie

Baoshun

Zhao

2016

Chemical Engineering Journal

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“…99%, Fluka, Prague, Czech Republic) as solvent and nitric acid (p.a. 65%, Penta, Prague, Czech Republic) as catalyst based on the method reported previously [6,20]. Absolute ethanol was added drop wise under stirring to titanium isopropoxide.…”

Section: Methodsmentioning

confidence: 99%

TiO2 and Fe2O3 Films for Photoelectrochemical Water Splitting

et al. 2015

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Titanium oxide (TiO2) and iron oxide (α-Fe2O3) hematite films have potential applications as photoanodes in electrochemical water splitting. In the present work TiO2 and α-Fe2O3 thin films were prepared by two methods, e.g., sol-gel and High Power Impulse Magnetron Sputtering (HiPIMS) and judged on the basis of physical properties such as crystalline structure and surface topography and functional properties such as simulated photoelectrochemical (PEC) water splitting conditions. It was revealed that the HiPIMS method already provides crystalline structures of anatase TiO2 and hematite Fe2O3 during the deposition, whereas to finalize the sol-gel route the as-deposited films must always be annealed to obtain the crystalline phase. Regarding the PEC activity, both TiO2 films show similar photocurrent density, but only when illuminated by UV light. A different situation was observed for hematite films where plasmatic films showed a tenfold enhancement of the stable photocurrent density over the sol-gel hematite films for both UV and visible irradiation. The superior properties of plasmatic films could be explained by ability to address some of the hematite drawbacks by the deposition of very thin films (25 nm) consisting of small densely packed particles and by doping with Sn.

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“…Alkaline-free glass (75 9 25 9 0.7 mm) was used as supports to avoid the presence of sodium [22,25]. In the case of aqueous synthesis, the glass surface has to be pretreated to ensure the adherence of the sol.…”

Section: Preparation Of Thin Filmsmentioning

confidence: 99%

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Léonard

Remy

Heinrichs

2016

J Sol-Gel Sci Technol

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Pure and multiwall carbon nanotube (MWCNT)-doped titanium dioxide (TiO 2 ) films, synthesised from two sol-gel routes (alcoholic and aqueous) and deposited by dipcoating on glass, have been developed as conductive, photocatalytic and superhydrophilic materials. While already crystallised in anatase structure at low temperature when synthesised in water, samples prepared in alcohol are amorphous. Their crystallisation in air has been studied at increasing temperatures. Effective incorporation of functionalised MWCNTs is confirmed in both aqueous and alcoholic samples with a closer interaction with TiO 2 particles in the case of aqueous synthesis. In alcoholic samples, 400°C seems to be an optimised calcination temperature since 300°C does not allow crystallisation into anatase and 500°Cremoves MWCNTs through burning. The purpose of MWCNT doping is to obtain coatings that exhibit easy-toclean or self-cleaning properties. This can be achieved through an optimised combination of electrical conductivity (for antistatic property), photoactivity and superhydrophilicity. These three properties require the crystallisation of TiO 2 into anatase. MWCNT doping dramatically increases both conductivity and photocatalytic activity, especially in alcoholic samples for the former and in aqueous samples for the latter. On the other hand, MWCNT introduction does not significantly affect the (super)hydrophilicity of films, which depends solely on the crystallinity of TiO 2 . Graphical Abstract

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Multilayer TiO2/SiO2 thin sol–gel films: Effect of calcination temperature and Na+ diffusion

Cited by 28 publications

References 32 publications

Facile process to greatly improve the photocatalytic activity of the TiO 2 thin film on window glass for the photodegradation of acetone and benzene

Facile process to greatly improve the photocatalytic activity of the TiO 2 thin film on window glass for the photodegradation of acetone and benzene

TiO2 and Fe2O3 Films for Photoelectrochemical Water Splitting

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

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