Evaluation of the durability of titanium dioxide photocatalyst coating for concrete pavement

Hassan, Marwa; Dylla, Heather; Mohammad, Louay N.; Rupnow, Tyson

doi:10.1016/j.conbuildmat.2010.01.009

Cited by 206 publications

(89 citation statements)

References 7 publications

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“…The products of the reaction are in the form of water-soluble nitrate compounds that can be washed from the active concrete surfaces by rain. Therefore, one proposed way of reducing the NO x and VOCs concentration in the atmosphere is the use of titanium dioxide in construction materials, near to mobile sources such as photocatalytic cement infrastructures or concrete roads [6,7].…”

Section: Introductionmentioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

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a b s t r a c tAn increasingly known application of nanomaterials in the construction industry is related to the photoactivity ability of semiconductors, where nano-anatase TiO 2 is perhaps the most well-known photocatalytic semiconductor and one which possesses a strong oxidizing capability. To analyze the photo-efficiency of four TiO 2 coatings and the effect of SiO 2 interlayer on the mechanic and photocatalytic activity in Rhodamine B (RhB) and NO x photodegradation, two photocatalytic cement series have been prepared. First, cement mortar was coated with three commercial TiO 2 suspensions (GG1, GC7 and CG13) and a home-made titania sol-gel (TEA), and secondly an insertion of a SiO 2 layer was applied on cement surface before spraying the TiO 2 layer.All studied TiO 2 -cements exhibited a significant RhB and NO x photodegradation, arising almost total RhB molar conversions, and upper 53% for NO x photo-oxidation respectively. Nevertheless, although SiO 2 layer deposited in between mortar and TiO 2 -cement did not stabilize the commercial TiO 2 coatings, a good adhesion was observed when silica was applied joint to the home-made titania gel (TEA), probably as a consequence of the interactions encountered between SiO 2 and TiO 2 gels. CG7-Si-Cem exhibited high rate at shorter irradiation times, but TEA-Cem and TEA-Si-Cem can be considered as very interesting and potential photocatalytic mortars due to useful mechanical properties, with a very good coatings adhesion that provides promising outdoor use, and good photo-efficiencies in RhB and NO x photo-oxidation.

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Section: Introductionmentioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

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“…As a matter of fact, the canopy location is likely to have had an influence on soiling deposit persistence, as it receives consistent amounts of thin iron powders rising upward from the production site underneath. These may have caused precocious decay in self-cleaning performance due to titanium dioxide removal from the surface, caused by mechanical abrasion in combination with weather agents (especially wind, but also rain) This fact raises some concerns related to coating durability issues, discussed by Hassan et al, 2010;Osborn et al, 2014;Mellot et al, 2006;.…”

Section: A Andaloro Et Al / Photocatalytic Self-cleaning Coatings Fmentioning

confidence: 99%

Photocatalytic self-cleaning coatings for building facade maintenance. Performance analysis through a case-study application

Andaloro

Mazzucchelli

Lucchini

et al. 2017

FDE

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Abstract.Facade maintenance has become a key aspect in building management, due the specific actions involved and operation related costs. Within this framework, the application of titanium dioxide photocatalytic sol-gel products on facade elements offers a wide range of opportunities to ensure proper functionality maintenance over time. This paper illustrates the self-cleaning performance of titanium dioxide and silicon dioxide based coatings applied to different kinds of cladding materials. All tested samples were opaque. Preliminary laboratory tests were performed by means of water contact angle measurements to verify hydrophobic and hydrophilic behaviour prior to outdoor application. Afterwards, outdoor tests were performed to monitor colour variation over a 36-month period to verify product effectiveness and durability. Results proved that the application of functionalized nanotechnological coating to a facade can significantly facilitate cleaning operations and reduce the necessary frequency over time. In addition, the output provides some preliminary information about the exposure condition influence on self-cleaning performance, which could be further investigated in the future.

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“…The study of TiO 2 use in construction of pavement has gradually become a hot topic. Researchers in Japan, China, Italy, and France tried the photocatalytic decomposition of TiO 2 in the construction of roads [14]. Nano-TiO 2 has the advantages in both photocatalytic decomposition and the scale effect, so that nano-TiO 2 attracted the attention.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Analysis of Variance of Storage Stability of Asphalt Binder Modified by Nanotitanium Dioxide

Zou

Sha

Ding

et al. 2017

Advances in Materials Science and Engineering

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To investigate the effects of nanoparticle content, storage time, and storage temperature on the storage stability of asphalt binders modified by nanoparticles, hot tube storage tests, softening point tests, and dynamic-shearing rheometer (DSR) tests were adopted to evaluate the properties of two kinds of nanotitanium dioxide (TiO 2 ) modified asphalt binders. A statistical one-way analysis of variance (ANOVA) test was employed to analyze the effects of those variations on the storage stability of the nano-TiO 2 modified asphalt binders. The results indicated that the softening point, the failure temperature, the dynamic-shear viscosity, and | * |/sin( ) of the binders increased with nanoparticle content. The storage stability of the binders decreased with nanoparticle content. The impact of storage time on the storage stability of the binders was remarkable when the storage time was more than 48 h. Moreover, the storage stability of the binders at low temperatures was better than that at high temperatures. Based on the one-way ANOVA, the size of nanoparticle had little influence on the storage stability of the nano-TiO 2 modified asphalt binders in this study. Reducing the nanoparticle size cannot effectively enhance the storage stability of the nanoparticle modified asphalt binder due to the agglomeration of nanoparticle.

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Evaluation of the durability of titanium dioxide photocatalyst coating for concrete pavement

Cited by 206 publications

References 7 publications

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Photocatalytic self-cleaning coatings for building facade maintenance. Performance analysis through a case-study application

Evaluation and Analysis of Variance of Storage Stability of Asphalt Binder Modified by Nanotitanium Dioxide

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