Photocatalytic degradation of soot deposition: Self-cleaning effect on titanium dioxide coated cementitious materials

Smits, Marianne; Chan, Chun kit; Tytgat, Tom; Craeye, Bart; Costarramone, N.; Lacombe, Sylvie; Lenaerts, Silvia

doi:10.1016/j.cej.2013.02.089

Cited by 84 publications

(51 citation statements)

References 30 publications

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“…Stearic acid is considered as a good model compound for organic fouling on, for instance, glass windows and is therefore often the pollutant of choice for studies involving self-cleaning surfaces. [58][59][60][61] [63] Within the framework of air pollution, the role of soot is becoming more and more prominent, which is why several groups' recent activities are concentrated on this emerging topic. [63][64][65][66] …”

Section: Page 5 Of 61mentioning

confidence: 99%

TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement

Verbruggen

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

282

123

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Please cite this article as: S.W. Verbruggen, TiO 2 photocatalysis for the degradation of pollutants in gas phase: from morphological design to plasmonic enhancement, Journal of Photochemistry and Photobiology C:Photochemistry Reviews (2015), http://dx. ABSTRACTTiO 2 -based photocatalysis has become a viable technology in various application fields such as (waste)water purification, photovoltaics/artificial photosynthesis, environmentally friendly organic synthesis and remediation of air pollution. Because of the increasing impact of bad air quality worldwide, this review focuses on the use and optimization of TiO 2 -based photocatalysts for gas phase applications. Over the past years various specific aspects of TiO 2 photocatalysis have been reviewed individually. The intent of this review is to offer a broad tutorial on (recent) trends in TiO 2 photocatalyst modification for the intensification of photocatalytic air treatment. After briefly introducing the fundamentals of photocatalysis, TiO 2 photocatalyst modification is discussed both on a morphological as well as an electronic level from the perspective of gas phase applications. The main focus is laid on recent developments, but also possible opportunities to the field. This review is intended as a solid introduction for researchers new to the field, as well as a summarizing update for established investigators.

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Section: Page 5 Of 61mentioning

confidence: 99%

TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement

Verbruggen

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

282

123

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“…Titania P25, known also as Degussa P25, Evonik P25, and Aeroxide P25, is probably the most famous mixed-phase titania, due to its extremely high photocatalytic activity in various photocatalytic reactions. For example, P25 was used for the decomposition of organic [44][45][46][47][48][49][50] and inorganic [51] compounds present in water and wastewater, the degradation of gas-phase pollutants [52][53][54][55][56], the purification of indoor environments (e.g., allergens' removal [57]), inactivation of microorganisms [58][59][60][61][62][63], self-cleaning surfaces [64][65][66] and solar energy conversion [67]. The number of cited papers using "P25"and "photocatalysis" as keywords has exceeded 10,000 per year, as shown in Figure 2.…”

Section: Photocatalytic Activity Of Titania Polymorphsmentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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Titania photocatalysts have been intensively examined for both mechanism study and possible commercial applications for more than 30 years. Although various reports have already been published on titania, including comprehensive review papers, the morphology-governed activity, especially for novel nanostructures, has not been reviewed recently. Therefore, this paper presents novel, attractive, and prospective titania photocatalysts, including zero-, one-, two-, and three-dimensional titania structures. The 1D, 2D, and 3D titania structures have been mainly designed for possible applications, e.g., (i) continuous use without the necessity of particulate titania separation, (ii) efficient light harvesting (e.g., inverse opals), (iii) enhanced activity (fast charge carriers' separation, e.g., 1D nanoplates and 2D nanotubes). It should be pointed out that these structures might be also useful for mechanism investigation, e.g., (i) 3D titania aerogels with gold either incorporated inside the 3D network or supported in the porosity, and (ii) titania mesocrystals with gold deposited either on basal or lateral surfaces, for the clarification of plasmonic photocatalysis. Moreover, 0D nanostructures of special composition and morphology, e.g., magnetic(core)-titania(shell), mixed-phase titania (anatase/rutile/brookite), and faceted titania NPs have been presented, due to their exceptional properties, including easy separation in the magnetic field, high activity, and mechanism clarification, respectively. Although anatase has been usually thought as the most active phase of titania, the co-existence of other crystalline phases accelerates the photocatalytic activity significantly, and thus mixed-phase titania (e.g., famous P25) exhibits high photocatalytic activity for both oxidation and reduction reactions. It is believed that this review might be useful for the architecture design of novel nanomaterials for broad and diverse applications, including environmental purification, energy conversion, synthesis and preparation of "intelligent" surfaces with self-cleaning, antifogging, and antiseptic properties.

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“…TiO 2 is shown as three crystalline structures: rutile, anatase, and brookite, being the first two forms as the most suitable for photocatalysis [23]. The photooxidation of organic matter has been evaluated in different construction materials such as bricks [24], stone [18,25], and mortars based in different binders [19,26,27]. Most of the research focused on self-cleaning has been made using the TiO 2 product as a coating [21,26].…”

Section: Introductionmentioning

confidence: 99%

Aesthetic Effects on Granite of Adding Nanoparticle TiO2 to Si-Based Consolidants (Ethyl Silicate or Nano-Sized Silica)

2020

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Considering that consolidant products are commonly used in the cultural heritage field and the titanium oxide nanoparticles (TiO 2 ) have been used to develop photocatalyst films to induce self-cleaning property, the scientific research on consolidants doped with TiO 2 is justified. However, the addition of TiO 2 can affect to the physical properties of the cultural heritage object, questioning the adequacy of the procedure. In this paper, we evaluated the influence of nanoparticle TiO 2 addition to two different commercial consolidant products (ethyl silicate or nano-sized silica) on the appearance and the color of a granite and the penetration through its fissure system. The stone was previously subjected to high temperature simulating the effect of a fire and the subsequent tap water jet to cool down. Therefore, different concentrations of nanocrystalline TiO 2 (0.5, 1, and 3 wt %) were considered. The different compositions were also studied considering the compactness, the extent and the thickness of the superficial xerogel coating, and as well the penetration of the consolidant.The minimal TiO 2 concentration tested (0.5 wt %) implied a low-medium risk of incompatibility as an intervention in cultural heritage field, because its low-medium potential as inducer of visible color changes of the granite surface. Regardless of the TiO 2 content, the nano-sized silica induced surface xerogel coatings more compact and continue than those formed in the ethyl silicate coated surfaces. Higher penetration rates were identified in the granite treated with nano-sized silica colloidal solution, while ethyl silicate was only found in the first few µm. It was found that penetration could depend on the application procedure, the solvent of the consolidant and the silica particle size. The TiO 2 addition reduced the penetration of the nano-sized silica consolidant.

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Photocatalytic degradation of soot deposition: Self-cleaning effect on titanium dioxide coated cementitious materials

Cited by 84 publications

References 30 publications

TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement

TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Aesthetic Effects on Granite of Adding Nanoparticle TiO2 to Si-Based Consolidants (Ethyl Silicate or Nano-Sized Silica)

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