Characterisation of the photocatalyst Pilkington Activ™: a reference film photocatalyst?

Mills, Andrew; Lepre, Anne; Elliott, Nicholas; Bhopal, Sharan; Parkin, Ivan P.; O'Neill, Shane A.

doi:10.1016/s1010-6030(03)00205-3

Cited by 300 publications

(290 citation statements)

References 28 publications

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“…All gases were purchased from BOC. In all the work reported here the commercial, selfcleaning photocatalyst-coated glass used as the photocatalyst test substrate was Activ™, manufactured by Pilkington Glass, which comprises a 15 nm CVD coating of anatase titania on 4 mm window glass coated with a thin barrier layer of silicon carbide [19]. The test pieces, always 25x25 mm square, were cleaned by wiping with a methanol-soaked lens-tissue, before being coated with the Rz-based paii.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Kinetics of reduction of a resazurin-based photocatalytic activity ink

Mackenzie¹,

MacDonald²,

Mills

et al. 2017

Catalysis Today

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Section: Methodsmentioning

confidence: 99%

“…4.3x10 4 cm -1 [21], and the TiO2 film thickness for Activ™, self-cleaning glass is ca. 15 nm [19]. Thus, the absorbance of the TiO2 film at 368 nm will be = 0.434x15x10 -7 = 0.028, and so only ca.…”

Section: Quantum Yield For the Photocatalysed Reduction Of The Rz Dyementioning

confidence: 98%

Kinetics of reduction of a resazurin-based photocatalytic activity ink

Mackenzie¹,

MacDonald²,

Mills

et al. 2017

Catalysis Today

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“…Due to their intrinsic beneficial physical properties, TiO 2 films are suitable for architectural coatings, and commercially available self-cleaning glasses, tiles, cement, porcelain based on TiO 2 already exist [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Photocatalytic Activity of Anatase TiO2 Thin Films by Modifying the Preferred <001> Grain Orientation with Reactive DC Magnetron Sputtering

Stefanov

Österlund

2014

Coatings

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Anatase TiO 2 thin films were deposited by DC reactive magnetron sputtering on glass substrates at 20 mTorr pressure in a flow of an Ar and O 2 gas mixture. The O 2 partial pressure (P O2 ) was varied from 0.65 mTorr to 1.3 mTorr to obtain two sets of films with different stoichiometry. The structure and morphology of the films were characterized by secondary electron microscopy, atomic force microscopy, and grazing-angle X-ray diffraction complemented by Rietveld refinement. The as-deposited films were amorphous. Post-annealing in air for 1 h at 500 °C resulted in polycrystalline anatase film structures with mean grain size of 24.2 nm (P O2 = 0.65 mTorr) and 22.1 nm (P O2 = 1.3 mTorr), respectively. The films sputtered at higher O 2 pressure showed a preferential orientation in the <001> direction, which was associated with particle surfaces exposing highly reactive {001} facets. Films sputtered at lower O 2 pressure exhibited no, or very little, preferential grain orientation, and were associated with random distribution of particles exposing mainly the thermodynamically favorable {101} surfaces. Photocatalytic degradation measurements using methylene blue dye showed that <001> oriented films exhibited approximately 30% higher reactivity. The measured intensity dependence of the degradation rate revealed that the UV-independent rate constant was 64% higher for the <001> oriented film compared to randomly oriented films. The reaction order was also found to be higher for <001> films compared to randomly oriented films, suggesting that the <001> oriented film exposes more reactive surface sites.

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“…A fingerprint applied to the surface completely disappeared after AM 1.5 irradiation for 2 h. Quantitative studies often use stearic acid, which readily assembles in a homogeneous layer onto inorganic surfaces, as an organic marker to monitor the photocatalytic performance of self-cleaning surfaces. 27,47,48 Its decomposition can be monitored by Fourier transform infrared spectroscopy (FTIR). Figure 5b shows the decomposition of stearic acid adsorbed on a BCP-34-derived ARC containing 50% TiO 2 .…”

mentioning

confidence: 99%

Self-Cleaning Antireflective Optical Coatings

et al. 2013

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Low-cost antireflection coatings (ARCs) on large optical surfaces are an ingredient-technology for high-performance solar cells. While nanoporous thin films that meet the zero-reflectance conditions on transparent substrates can be cheaply manufactured, their suitability for outdoor applications is limited by the lack of robustness and cleanability.Here, we present a simple method for the manufacture of robust selfcleaning ARCs. Our strategy relies on the self-assembly of a blockcopolymer in combination with silica-based sol−gel chemistry and preformed TiO 2 nanocrystals. The spontaneous dense packing of copolymer micelles followed by a condensation reaction results in an inverse opal-type silica morphology that is loaded with TiO 2 photocatalytic hot-spots. The very low volume fraction of the inorganic network allows the optimization of the antireflecting properties of the porous ARC despite the high refractive index of the embedded photocatalytic TiO 2 nanocrystals. The resulting ARCs combine high optical and self-cleaning performance and can be deposited onto flexible plastic substrates.

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Characterisation of the photocatalyst Pilkington Activ™: a reference film photocatalyst?

Cited by 300 publications

References 28 publications

Kinetics of reduction of a resazurin-based photocatalytic activity ink

Kinetics of reduction of a resazurin-based photocatalytic activity ink

Tuning the Photocatalytic Activity of Anatase TiO2 Thin Films by Modifying the Preferred <001> Grain Orientation with Reactive DC Magnetron Sputtering

Self-Cleaning Antireflective Optical Coatings

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