Nanostructured low crystallized titanium dioxide thin films with good photocatalytic activity

López, Antonio Fernández; Acosta, Dwight; Martı́nez, Arturo I.; Santiago, Julio

doi:10.1016/j.powtec.2010.04.025

Cited by 61 publications

(23 citation statements)

References 40 publications

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“…In our case, this value of k s is equal to 90 h -1 m -2 while the value of k s reported by Lopez et al [27] for films produced with a spray pyrolysis method is equal to 93 h -1 m -2 . These values are of the same order of magnitude which means that the deposition method does not influence the specific activity of these films.…”

Section: Discussioncontrasting

confidence: 44%

“…In this case the values obtained for the apparent reaction rate constant vary from 0.072 h -1 to 0.234 h -1 for a series of photocatalysts according to various thermal treatments performed. Another study reported in the literature [27] showed that the photocatalytic activity of films produced by a spray pyrolysis method can also be described using an apparent first-order equation and in this case, the value of apparent reaction rate constant vary from 0.017 h -1 to 0.037 h -1 .…”

Section: Introductionmentioning

confidence: 97%

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Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

Malengreaux

Timmermans

Pirard

et al. 2012

Chemical Engineering Journal

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TiO 2 thin films have been produced by a dip-coating process using a non-aqueous sol-gel method. This study investigated the influence of the operating variables such as nature of the substrate, sol concentration, withdrawing speed of the dip-coater and number of layers on the physico-chemical properties of the films using XRD, GIXRD, UV-Vis spectroscopy, profilometry, spectroscopic ellipsometry and SEM. Photocatalytic activity of the films was * Corresponding author. The performances of the catalysts were compared through the reaction rate constants determined using an apparent first-order kinetic model adjusted on the experimental data.This study showed that the photocatalytic activity and the reaction rate constant depend on the film thickness through the synthesis and dipping variable, with an optimum thickness of 80 nm being observed. An optimized transparent film exhibiting a high adhesion, a well crystallized TiO 2 -anatase phase, a good photocatalytic activity and a reaction rate constant k equal to 0.126 h -1 was obtained using a simple process. The specific photocatalytic activity of this film was higher to the one measured for TiO 2 powders in previous works.

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Section: Discussioncontrasting

confidence: 44%

Section: Introductionmentioning

confidence: 97%

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

Malengreaux

Timmermans

Pirard

et al. 2012

Chemical Engineering Journal

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show abstract

“…The KT34-600 exhibited the highest activity while the activity of the TT600 sample was higher than that of KT14-600. The photochemical performance of the samples appeared to obey the pseudo first-order reaction; thus the Langmuir-Hinshel-Wood model was used to estimate the rate constant of the photocatalysts [11,33,47]. performance of the samples obtained herein was largely influenced by the porous structure, amount of the TiO 2 in the composite, crystallinity, particle size and crystallite size.…”

Section: Photocatalytic Propertiesmentioning

confidence: 98%

Sol–gel synthesis of photoactive kaolinite-titania: Effect of the preparation method and their photocatalytic properties

Shao

Engole

Imran

et al. 2015

Applied Surface Science

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“…Transparent TiO 2 thin films were deposited on soda lime glass at different substrate temperatures by a spray pyrolysis technique from an aqueous peroxo-polytitanic acid solution [107]. A low polycrystalline brookite structure was obtained when the amorphous as-deposited films were annealed in air at 500 °C for 3 h.…”

Section: Brookite Filmsmentioning

confidence: 99%

Brookite, the Least Known TiO2 Photocatalyst

2013

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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.

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Nanostructured low crystallized titanium dioxide thin films with good photocatalytic activity

Cited by 61 publications

References 40 publications

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

Sol–gel synthesis of photoactive kaolinite-titania: Effect of the preparation method and their photocatalytic properties

Brookite, the Least Known TiO2 Photocatalyst

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