Self-cleaning and de-polluting stone surfaces: TiO 2 nanoparticles for limestone

Quagliarini, Enrico; Bondioli, Federica; Goffredo, Giovanni Battista; Cordoni, Caterina; Munafò, Placido

doi:10.1016/j.conbuildmat.2012.07.006

Cited by 163 publications

(93 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to their photocatalytic properties TiO2NP are among the most used and produced ENPs, with applications in building materials, self-cleaning paints and self-sterilizing surfaces, as food additive and in cosmetics (Gottschalk et al, 2009;Quagliarini et al, 2012;Robichaud et al, 2009;Weir et al, 2012). TiO2NPs have been reported to be released from consumer products such as self-cleaning façade paints, and despite a high removal rate in waste water treatment plants TiO2NP have been detected in waste water treatment plant effluents, indicating environmental exposure (Kiser et al, 2009;Neal et al, 2011;Westerhoff et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

Farkas

Bergum

Nilsen

et al. 2015

Science of The Total Environment

View full text Add to dashboard Cite

Nanoparticles are emerging contaminants of concern. Knowledge on their environmental impacts is scarce, especially on their interactive effects with other contaminants. In this study we investigated effects of titanium dioxide nanoparticles (TiO2NP) on the blue mussel (Mytilus edulis) and determined their influence on the bioavailability and toxicity of benzo(a)pyrene (B(a)P), a carcinogenic polyaromatic hydrocarbon (PAH). Blue mussels were exposed to either TiO2NP (0.2 and 2.0 mg L -1 ) or B(a)P (20 µg L -1 ) and to the respective combinations of these two compounds. Aqueous contaminant concentrations, the uptake of Ti and B(a)P into mussel soft tissue, effects on oxidative stress and chromosomal damage were analyzed. The uncoated TiO2NP agglomerated rapidly in the seawater. The presence of TiO2NP significantly reduced the bioavailability of B(a)P, shown by lowered B(a)P concentrations in exposure tanks and in mussel tissue. The activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) were impacted by the various exposures regimes, indicating oxidative stress in the contaminant exposure groups. While SOD activity was increased only in the 0.2TiO2NP exposure group, CAT activity was enhanced in both combined exposure groups.The GPx activity was increased only in the groups exposed to the two single compounds. In hemocytes, increased chromosomal damage was detected in mussels exposed to the single compounds, which was further increased after exposure to the combination of compounds. In this study we show that the presence of TiO2NP in the exposure system reduced B(a)P uptake in blue mussels. However, since most biomarker responses did not decrease despite lower B(a)P uptake in combined exposures, the results suggest that TiO2NP can act as additional stressor, or potentially alters B(a)P toxicity by activation.

show abstract

Section: Introductionmentioning

confidence: 99%

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

Farkas

Bergum

Nilsen

et al. 2015

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…All of the above mentioned solutions are completely transparent to the human eye after the solvent evaporation process is completed, both in wet and dry condition of the substrate. This feature is very important from an application related viewpoint as it broadens the possibility of self-cleaning product use both in new construction and historic buildings (Quagliarini et al, 2012). …”

Section: Deposition Of Titanium Dioxide Sol-gel Products For Surface mentioning

confidence: 99%

“…This technique was the only means to monitor self-cleaning performance of the cladding elements over time, as it was not possible to remove the facade panels for further laboratory analyses. However, the authors relied on results from previous works on photoactive self-cleaning products, proposing colorimetry as an accountable method for the estimation of self-cleaning capacity when operating outdoors (Quagliarini et al, 2012;; Gladis & Schumann, 2011). Colour parameters were extracted by means of a portable KonicaMinolta spectrophotometer CM-2600d, which measures surface spectral reflectance every 10 nm in the range of 360-740 nm, using the supporting software Spectramagic NX.…”

Section: Outdoor Exposure Testmentioning

confidence: 99%

“…In addition to this, self-cleaning materials have found wide acceptance in the field of historical building heritage preservation, due to their transparency on the substrate and the possibility to maintain the original aesthetical appearance of those buildings at almost no effort and very reduced cost (Quagliarini et al, 2012). As a matter of fact, not only does the application of titanium dioxide based products on porous facade materials allow to keep their surface clean over time, but it also minimizes the risk for phototropic bacteria growth, which is usually among the main causes of mould formation related damage in porous cladding materials, both on vertical and horizontal envelope surfaces (roofing) .…”

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

confidence: 99%

See 1 more Smart Citation

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

Andaloro

Mazzucchelli

Lucchini

et al. 2017

FDE

View full text Add to dashboard Cite

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.

show abstract

“…The properties of limestone as coating agent makes the people there use it as a wall painting [1]. Besides easy to fabricate, it is also inexpensive and hard to peel off [2].…”

Section: Introductionmentioning

confidence: 99%

Self-Cleaning Limestone Paint Modified by Nanoparticles TiO2 Synthesized from TiCl3 as Precursors and PEG6000 as Dispersant

Fadhilah

Etruly

Muharja

et al. 2017

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

Limestone is commonly used for wall painting, but it is easy to be dirty. In this study, a self-cleaning limestone paint was synthesized by modifying dispersant and TiO2 nanoparticles. The TiO2 that prepared by TiCl3 were functionalized with PEG6000 as a surface activating agent. The paint achieved highest impurity degradation of 83.11 % for the mass ratio of TiO2 and PEG6000 (MRTP) of 1: 6, in which TiO2 average size distribution was 75.81 µm 2 , the particle surface area of TiO2 was 2,544 µm 2 , and the smallest contact angle was 7°. It was found that the dispersant (PEG6000) significantly improved the self-cleaning ability of limestone paint. The surface tension reduction from PEG6000-modified prevented the agglomeration process of TiO2 and suggests that the limestone paint a good self-cleaning coating for wall painting.

show abstract

Self-cleaning and de-polluting stone surfaces: TiO 2 nanoparticles for limestone

Cited by 163 publications

References 26 publications

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

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

Self-Cleaning Limestone Paint Modified by Nanoparticles TiO2 Synthesized from TiCl3 as Precursors and PEG6000 as Dispersant

Contact Info

Product

Resources

About