Photocatalytic activity of sol–gel TiO2 thin films deposited on soda lime glass and soda lime glass precoated with a SiO2 layer

Novotná, Petra; Krýsa, Josef; Maixner, J.; Klusoň, Petr; Novák, Pavel

doi:10.1016/j.surfcoat.2010.01.043

Cited by 50 publications

(31 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Anatase films deposited on soda lime glass precoated with a SiO 2 layer exhibited better activity for the photodecomposition of acid orange 7 and 4-chlorophenol than brookite films obtained on soda lime glass [108]. Similar results were reported by Krýsa et al [109].…”

Section: Pure Brookitesupporting

confidence: 86%

“…Superhydrophilic properties, even in dark conditions, were exhibited by transparent brookite thin films prepared by using titanium tetraisopropoxide as the precursor [108]. Similar results were obtained by Bellardita et al [121] who studied the photocatalytic activity and the hydrophilicity of anatase, brookite and rutile films deposited by sols obtained by thermolysis of TiCl 4 in aqueous or diluted HCl solutions.…”

Section: Pure Brookitesupporting

confidence: 79%

“…Novotna et al [108,109] prepared pure brookite thin films by a very simple sol-gel method. Soda lime glasses were dipped into a solution of titanium isopropoxide, HCl, 2-propanol, and acetylacetone at 22 °C.…”

Section: Brookite Filmsmentioning

confidence: 99%

See 2 more Smart Citations

Brookite, the Least Known TiO2 Photocatalyst

2013

View full text Add to dashboard Cite

Abstract:Brookite is the least studied TiO 2 photocatalyst due to the difficulties usually encountered in order to obtain it as a pure phase. In this review, a comprehensive survey of the different methods available for preparing brookite powders and films is reported. Attention has been paid both to the most traditional methods, such as hydrothermal processes at high temperatures and pressures, and to environmentally benign syntheses using water soluble compounds and water as the solvent. Papers reporting the photocatalytic activity of pure and brookite-based samples have been reviewed.

show abstract

Section: Pure Brookitesupporting

confidence: 86%

Section: Pure Brookitesupporting

confidence: 79%

See 1 more Smart Citation

Brookite, the Least Known TiO2 Photocatalyst

2013

View full text Add to dashboard Cite

show abstract

“…The thickness is enough in both cases to avoid the diffusion of Na ? cations from the glass substrate to the TiO 2 coating during firing, thus preserving the semiconductor properties [59][60][61]. In the case of dense AgTiO 2 coatings, the addition of Ag-PVP causes an increase in thickness, from 90 to 290 nm and a simultaneous Figure 7 shows the GXRD spectra of sintered Ag-SiO 2 , dense Ag-TiO 2 , and mesoporous Ag-TiO 2 films deposited onto Si wafers in the range 2h = 20°-70°.…”

Section: Characterisation Of Doped Coatingsmentioning

confidence: 99%

Enhanced photocatalytic activity of mesoporous SiO2/TiO2 sol–gel coatings doped with Ag nanoparticles

Roldán

Castro

Pellegri

et al. 2015

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

In the present study, as-prepared silver nanoparticles have been incorporated into SiO 2 and TiO 2 sols. The characterisation of the silver nanoparticles was performed through transmission electron microscopy, grazing X-ray diffraction, and UV-visible spectroscopy, before and after mixing with the different sols. Multilayer coatings doped with silver nanoparticles were also prepared by combining different compositions and analysed by TEM and GXRD. The photocatalytic activity was studied through the degradation of methyl orange in aqueous solution under UV light exposure. High photocatalytic efficiency was observed for all the multilayer coatings. The highest efficiency was obtained for the Ag-SiO 2 /TiO 2 mesoporous system that reached a degradation percentage of methyl orange up to 94 % after 2.5 h of irradiation, near the complete elimination of the pollutant. The mechanism that explains the high photocatalytic efficiency of this multilayer coating is associated with the high porosity of the mesoporous coatings and with the increase in the local electric field, associated with the effect of plasmon resonance surface produced for the presence of metallic silver nanoparticles in the SiO 2 film.

show abstract

“…TiO2-Reference and after a first drying the RH was increased up to 70%, this being maintained for 24 h. The glass-slides were coated with a first layer of quasi-dense SiO 2 [40,41] (thickness of ∼218 nm, and refractive index of ∼1.44) to inhibit the diffusion of Na + cations from the substrate to TiO 2 coating during heat treatment [42][43][44].…”

Section: Preparation Of the Tio 2 Sols And Coatingsmentioning

confidence: 99%