Estado del arte de los materiales a base de cemento que contienen TiO&lt;sub&gt;2&lt;/sub&gt;: propiedades auto-limpiantes

Maury, Aníbal; Belie, Nele De

doi:10.3989/mc.2010.48408

Cited by 33 publications

(11 citation statements)

References 19 publications

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“…While CG7-Si-Cem presented the fastest RhB reaction evolution, TEA-SiCem photoefficiency was the least affected comparing with the corresponding TiO 2 -Cem. This behaviour indicates that an initial activation stage, 4-6 h depending on the catalyst coating, looks necessary, after that photoinduction period [55], [56], CG1-Si-Cem, CG7-Si-Cem and TEA-Si-Cem reached >90% RhB conversion after 5 days, meanwhile CG13-Si-Cem activation period was longer and the conversion hardly reached 80%.…”

Section: Tablementioning

confidence: 99%

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

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

100

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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: Tablementioning

confidence: 99%

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

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

100

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“…Biocides can be mixed with consolidants and water repellents to promote protection against future biological growth (Ditaranto et al 2010;Barrionuevo and Gaylarde 2011;Khamova et al 2012;Pinna et al 2012). Biological agents such as plant extracts have also been used (Afifi 2012 Nanotechnology has also proposed for protection against biological agents and other pollutants with examples of nanoparticulates of SiO 2 (Manoudis et al 2009;Matziaris et al 2011), organomodified montmorillonite (D'Arienzo et al 2008Scarfato et al 2012), titanium dioxide and zinc oxide (Fonseca et al 2010;Gladis et al 2010;Maury and De Belie 2010;MacMullen et al 2012;La Russa et al 2012;Quagliarini et al 2012), copper (Ditaranto et al 2010) or diamonds (Khamova et al 2012).…”

Section: Protective Treatmentsmentioning

confidence: 98%

Conservation of stony materials in the built environment

Alves

Sanjurjo-Sánchez

2015

Environ Chem Lett

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Materials in the built environment are exposed to several agents that promote alteration processes resulting in features that might be considered detrimental of its value. There are diverse possible intervention measures that might, however, have unwanted side effects. Here are reviewed the main issues related to the struggle against these alteration processes, from the consideration of the intervention criteria to strategic considerations on the organisation of the intervention that must include temporal and spatial features of alteration processes, as well as possible interventions on the surroundings of the materials and in the materials, including its replacement. The longterm effectiveness of these interventions is linked with the global strategy namely in relation to the conditions that promote alteration processes. Some sustainability questions related to the intervention operations are also considered such as the use of toxic substances and the consumption of resources.

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“…The possibility of incorporating titanium dioxide nanoparticles in construction materials (cement, plaster, concrete, etc) has been investigated and its feasibility has been demonstrated in previous research works [24]. The photocatalytic reaction takes place on the surface of these materials, where the adsorption of gaseous pollutants occurs.…”

Section: Photocatalytic Degradation Of Indoor Pollutantsmentioning

confidence: 99%

Multifunctional wall coating combining photocatalysis, self-cleaning and latent heat storage

Lucas¹,

Aguiar²

2018

Mater. Res. Express

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Mortars, one of the most common construction materials, have not received any substantial modification for many decades. This has changed in recent years; new compositions are now being developed, with new properties, using nano-additives, fibres and capsules. In this work, surfaces with new and innovative functionalities that promote energy savings and improve air quality have been developed and studied. Incorporation of phase change materials (PCM) and titanium dioxide (TiO 2) nanoparticles in construction products is currently under study by different research groups. However, these studies only address their incorporation separately. Adding new additives into the mortar's matrix can be complex-due to microstructural modifications that will influence both fresh and hardened state properties. Moving from a single additive to multiple additions, as in this study, increases the system's complexity. Only with a good understanding of the microstructural properties, it is possible to add multiple additives (including nano and microparticles) to mortars, without damaging its final quality. This work demonstrates that a higher additive content is not always a guarantee of better results; lower additions can often provide a better compromise between performance and final mechanical properties. The results presented in this paper confirmed this and show that combining PCM microcapsules and TiO 2 nanoparticles open a new path in the development of mortars with multiple functionalities. In this study, a new material with depolluting, self-cleaning and heat storage was created. For the development of new and innovative mortars, a proper balance of multiple additives, supported by the study of microstructural changes, can lead to an optimization of the compositions, ensuring that the mortar's final properties are not affected.

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Estado del arte de los materiales a base de cemento que contienen TiO<sub>2</sub>: propiedades auto-limpiantes

Cited by 33 publications

References 19 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

Conservation of stony materials in the built environment

Multifunctional wall coating combining photocatalysis, self-cleaning and latent heat storage

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