Preparation of TiO2 coatings on PET monoliths for the photocatalytic elimination of trichloroethylene in the gas phase

Sánchez, Benigno; Coronado, Juan M.; Candal, Roberto; Portela, Raquel; Tejedor, Isabel; Anderson, Marc A.; Tompkins, Dean T.; Lee, Timothy J.

doi:10.1016/j.apcatb.2006.03.021

Cited by 82 publications

(46 citation statements)

References 23 publications

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“…Other requirements for good photocatalyst supports include: 1) to facilitate mass transport to and from the active sites, 2) to increase the effective residence time in the proximity of the photocatalyst, and 3) to avoid blocking irradiation from the active sites. Support materials for TiO 2 include, among others, glass (8)(9)(10), quartz (11), paper (12), cement (7); activated carbon fibers (13,14), ceramics (15,16), stainless steel (17) and polymeric matrices such as poly(ethylene terephthalate) (PET) and cellulose acetate (18,19). Similarly, significant research efforts have been made to improve the photocatalytic efficiency of TiO 2 -based nanoparticles through chemical and physical transformations (20)(21)(22)(23)(24)(25).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Kibanova

Cervini-Silva

Destaillats

2009

Environ. Sci. Technol.

113

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Clay-supported TiO 2 photocatalysts can potentially improve the performance of air treatment technologies via enhanced adsorption and reactivity of target volatile organic compounds (VOCs). In this study, a bench-top photocatalytic flow reactor was used to evaluate the efficiency of hectorite-TiO 2 and kaolinite-TiO 2 , two novel composite materials synthesized in our laboratory. Toluene, a model hydrophobic VOC and a common indoor air pollutant, was introduced in the air stream at realistic concentrations, and reacted under UVA (λ max = 365 nm) or UVC (λ max = 254 nm) irradiation. The UVC lamp generated secondary emission at 185 nm, leading to the formation of ozone and other short-lived reactive species. Performance of clay-TiO 2 composites was compared with that of pure TiO 2 (Degussa P25), and with UV irradiation in the absence of photocatalyst under identical conditions. Films of clay-TiO 2 composites and of P25 were prepared by a dip-coating method on the surface of Raschig rings, which were placed inside the flow reactor. An upstream toluene concentration of ~170 ppbv was generated by diluting a constant flow of toluene vapor from a diffusion source with dry air, or with humid air at 10, 33 and 66 % relative humidity (RH). be partially attributed to the contribution of gas phase reactions by short-lived radical species. When the reaction rate was normalized to the light irradiance, T r /I λ , the UV/TiO 2 reaction under UVA irradiation was more efficient for samples with a higher content of TiO 2 (P25 and Hecto-TiO 2 ), but not for Kao-TiO 2 . In all cases, reaction rates

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Section: Introductionmentioning

confidence: 99%

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Kibanova

Cervini-Silva

Destaillats

2009

Environ. Sci. Technol.

113

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“…In addition, TiO 2 exposed under UV exhibits photocatalytically induced superhydrophilicity that converts the hydrophobic character of the surface to hydrophilic and forms the uniform water film, which prevents the adhesion of inorganic or organic components on its surface, which retains clean [5,6]. The powdered TiO 2 may be deployed on the surfaces of various substrates, such as glass, ceramics, metals, textiles, cement, bricks or fibres to provide layer that exhibits self sterilisation and self cleaning properties, when it is exposed to the light [7][8][9][10]. This creates a large commercial potential for TiO 2 application: in medicine, automotive and food industries, environmental protection, but especially in the architecture (cultural heritage purposes, facade paints, indoor, wall paper, tiles, etc.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and Self-Cleaning Properties of Ag-Doped TiO2

Tryba¹,

Piszcz²,

Morawski³

2009

TOMSJ

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Commercially available TiO 2 of anatase structure produced in the Chemical Factory Police S.A. was modified by doping Ag from AgNO 3 solution via photodeposition method. The obtained amount of deposited Ag on TiO 2 was in the range of 0.11 to 0.98 mass %. Deposition of Ag on TiO 2 resulted in the retarding of the recombination reaction and formation of the higher amount of OH radicals on the photocatalyst surface during irradiation with UV light. The photocatalytic activity of samples was tested for the decomposition of phenol and Reactive Black in the water solution under both, UV and artificial solar light radiation. Deposition of Ag on TiO 2 surface increased its photocatalytic activity towards the Reactive Black decomposition but not for phenol. High adsorption of Reactive Black on Ag modified TiO 2 photocatalysts, which was higher than on TiO 2 , could enhance the photocatalytic activity of these samples. The solution with 1% slurry of TiO 2 -Ag was sprayed on the surface of concrete. For concrete impregnated with TiO 2 -Ag slurry the both, fungicidal and self-cleaning effect for dyes were observed.

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“…22 Concentration of cyanide and products using TiO 2 when the suspension was bubbled with oxygen. Reprinted from Kim and Lee (2003), Copyright with permission from Elsevier et al Penot et al 2003;Lacoste et al 2003;Zan et al 2004;Xu et al 2005;Kim et al 2006;Sun et al 2002;Iketania et al 2003;Sanchez et al 2006;Moustaghfir et al 2006;Yang et al 2006;Schmidt et al 2006;Wakamura et al 2003;Yoshida et al 2006). …”

Section: Application In Polymer Sciencementioning

confidence: 91%

“…To improve adherence, the surface of SiO 2 was coated with fluorinated surfactant to lower surface tension, or the surface of PET was modified . Reprinted from , Copyright with permission from Elsevier with a layer of poly(diallyldimethylammonium) chloride (PDDA) to form a positively charged surface (Sanchez et al 2006).…”

Section: Functional Coating On Polymeric Substratementioning

confidence: 99%

Purification of Toxic Compounds in Water and Treatment of Polymeric Materials

Lee

Kim²,

Lee³

et al. 2010

Nanostructure Science and Technology

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Among a variety of semiconductors as the medium for photocatalytic treatment of pollutants in the form of suspended powders or immobilized phases, titanium dioxide is the most widely used due to its high stability, good performance, and low cost. In this chapter, photocatalysis of aqueous pollutants covers both organic pollutants, including pyrimidines, phenols, pesticides, synthetic dyes, etc., and inorganic pollutants, mainly focusing on nitrogen-containing ones. In the latter section, application to polymer science encircles applications to pigmentation, photocatalyst-polymer composites, and functional coating.

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Preparation of TiO2 coatings on PET monoliths for the photocatalytic elimination of trichloroethylene in the gas phase

Cited by 82 publications

References 23 publications

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Photocatalytic and Self-Cleaning Properties of Ag-Doped TiO2

Purification of Toxic Compounds in Water and Treatment of Polymeric Materials

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Preparation of TiO2 coatings on PET monoliths for the photocatalytic elimination of trichloroethylene in the gas phase

Cited by 82 publications

References 23 publications

Efficiency of Clay−TiO2 Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Efficiency of Clay−TiO2 Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Photocatalytic and Self-Cleaning Properties of Ag-Doped TiO2

Purification of Toxic Compounds in Water and Treatment of Polymeric Materials

Contact Info

Product

Resources

About

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant

Efficiency of Clay−TiO₂ Nanocomposites on the Photocatalytic Elimination of a Model Hydrophobic Air Pollutant