TiO2 optical coating layers for self-cleaning applications

Euvananont, Chanipat; Junin, Chabaiporn; Inpor, Kroekchai; Limthongkul, Pimpa; Thanachayanont, Chanchana

doi:10.1016/j.ceramint.2007.09.043

Cited by 175 publications

(82 citation statements)

References 13 publications

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“…For film thinner than 80 nm, more distinct GIXRD peaks with higher intensity are observed with increasing withdrawing speed and TTIP concentration suggesting that the material crystallinity is enhanced when the thickness increases [17,23]. For films thicker than 80 nm, the GIXRD patterns are superimposable suggesting that the X-rays penetrate a certain thickness of the film which always presents the same degree of crystallinity independently of the dipping variables.…”

Section: Discussionmentioning

confidence: 79%

“…1 both for powders and the corresponding films is around 18 nm and is not influenced by the synthesis and dip-coating variables such as precursor concentration, the withdrawing speed and number of cycles. This value has been reported in previous studies as an appropriate size for good photocatalytic activity [17,23,43].…”

Section: Discussionmentioning

confidence: 85%

“…The photocatalytic activity of each TiO 2 thin film was evaluated by following the degradation of methylene blue (MB) which was used as a model molecule to represent a pollutant [11,23]. The films were placed at the bottom of a plastic Petri dish and immersed in a solution of MB (2 × 10 -5 mol L -1 ) and the dishes were closed with a plastic lid in order to avoid evaporation.…”

Section: Photocatalytic Activity Of the Filmsmentioning

confidence: 99%

“…In the last decade, the photocatalytic degradation of methylene blue under artificial UV light in the presence of TiO 2 based catalyst has been widely used as a reference test to assess the photocatalytic activity of a catalyst [11,23]. It is generally admitted that a LangmuirHinshelwood (L-H) expression can be used to describe the photocatalytic discoloration of dye.…”

Section: Introductionmentioning

confidence: 99%

“…Different non-aqueous synthetic routes to obtain the Ti-O-Ti network have been studied using different titanium alkoxides precursors complexed by acetylacetone and an in situ production of water through an esterification reaction initiated by the addition of acetic acid in the system [15,22,23].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 85%

Section: Photocatalytic Activity Of the Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Prevention and Control of Biofilms in the Food Industry and Bio‐Nanotechnology Approaches

Birkenhauer

Neethirajan

2015

Biofilms in the Food Environment

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Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

Jiang,

Chen,

Zhang

et al. 2024

Advanced Materials

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High‐performance multifunctional nanocoatings not only protect and enhance substrate materials, but also offer additional functionalities. This demands a sophisticated coordination of the coating's inherent properties and microstructural features. Here we present a multi‐functional active nanocoating via meta‐structural engineering of covalent organic framework (COF) deposition materials. Our COF nanocoating, characterized by well‐defined micropores (1‐2 nm), meta‐structured textures (30‐300 nm), tailored thickness (100‐300 nm), and good uniformness, showcases a unique combination of angle‐independent structural coloration and ultrafast responsiveness to gaseous stimuli. Remarkably, it demonstrates good compatibility with a wide range of inert substrate materials, from rigid ones like glass and metal to flexible elastomers and nanomaterial films of various shapes and sizes. This versatility enables the facile development of devices that can optically report information about their environments. Examples include chemically active coatings with ultrafast (∼ 10 ms) color‐changing behaviors and programmable actuation behaviors upon exposure to gaseous stimuli, and mechanically active coatings that can detect substrate strain up to 50% yet maintain structural robustness and consistent coloration hue. We believe that meta‐structural engineering of COF nanocoatings on inert substrates could enable them to respond to environmental stimuli, potentially indicating a new trend in developing multifunctional materials and smart devices.This article is protected by copyright. All rights reserved

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TiO2 optical coating layers for self-cleaning applications

Cited by 175 publications

References 13 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

Prevention and Control of Biofilms in the Food Industry and Bio‐Nanotechnology Approaches

Meta‐Structured Covalent Organic Framework Nanocoatings with Active and Angle‐Independent Structural Coloration

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