Nanoparticles Applied to Stone Buildings

Becerra, Javier; Zaderenko, Ana Paula; Gómez‐Morón, María Auxiliadora; Ortiz, Pilar

doi:10.1080/15583058.2019.1672828

Cited by 24 publications

(22 citation statements)

References 109 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the construction field, nanostructured TiO 2 is commonly employed to degrade organic pollutants in the air or to protect the building materials from soot, due to its photocatalytic and hydrophobic properties. The biocide activity of TiO 2 can also be exploited to reduce the formation of biofilms formed on the surface of buildings [160]. Indeed, biofouling causes, not only aesthetic and structural degradation of construction materials and surfaces, but also bacteria and fungi proliferation that may pose a great health concern [149].…”

Section: Tio 2 Nps-based Nanocomposite Against Biofouling On Building...mentioning

confidence: 99%

Photocatalytic TiO2-Based Nanostructured Materials for Microbial Inactivation

et al. 2020

View full text Add to dashboard Cite

Pathogenic microorganisms can spread throughout the world population, as the current COVID-19 pandemic has dramatically demonstrated. In this scenario, a protection against pathogens and other microorganisms can come from the use of photoactive materials as antimicrobial agents able to hinder, or at least limit, their spreading by means of photocatalytically assisted processes activated by light—possibly sunlight—promoting the formation of reactive oxygen species (ROS) that can kill microorganisms in different matrices such as water or different surfaces without affecting human health. In this review, we focus the attention on TiO2 nanoparticle-based antimicrobial materials, intending to provide an overview of the most promising synthetic techniques, toward possible large-scale production, critically review the capability of such materials to promote pathogen (i.e., bacteria, virus, and fungi) inactivation, and, finally, take a look at selected technological applications.

show abstract

Section: Tio 2 Nps-based Nanocomposite Against Biofouling On Building...mentioning

confidence: 99%

Photocatalytic TiO2-Based Nanostructured Materials for Microbial Inactivation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Various nanomineral- and polymer-based consolidants have been demonstrated to partially restore the lost cohesion within the weathered stone surface layers. These most often include water or organic solvent-dispersed inert nanosized inorganic particles, which provide cohesion upon their aggregation (such as colloidal silica, calcium hydroxide, calcite, or metal oxides − ) or synthetic organic polymers and reactive alkoxysilanes, which consolidate grains via self-polymerization reactions. ,, Although grouting materials such as cement or organic adhesives may act as suitable cohesives and sealants in geotechnics, they are often inappropriate for cultural heritage applications as they may fail to preserve the initial surface appearance, lack chemical or microstructural compatibility with stone material, or induce undesirably drastic changes in the mechanical properties of the reconsolidated surface layers.…”

Section: Introductionmentioning

confidence: 99%

Cohesion Gain Induced by Nanosilica Consolidants for Monumental Stone Restoration

et al. 2022

View full text Add to dashboard Cite

Mineral nanoparticle suspensions with consolidating properties have been successfully applied in the restoration of weathered architectural surfaces. However, the design of these consolidants is usually stone-specific and based on trial and error, which prevents their robust operation for a wide range of highly heterogeneous monumental stone materials. In this work, we develop a facile and versatile method to systematically study the consolidating mechanisms in action using a surface forces apparatus (SFA) with real-time force sensing and an X-ray surface forces apparatus (X-SFA). We directly assess the mechanical tensile strength of nanosilica-treated single mineral contacts and show a sharp increase in their cohesion. The smallest used nanoparticles provide an order of magnitude stronger contacts. We further resolve the microstructures and forces acting during evaporation-driven, capillary-force-induced nanoparticle aggregation processes, highlighting the importance of the interactions between the nanoparticles and the confining mineral walls. Our novel SFA-based approach offers insight into nano- and microscale mechanisms of consolidating silica treatments, and it can aid the design of nanomaterials used in stone consolidation.

show abstract

“…There have been a number of reviews describing the microbial biofilms present on cultural heritage buildings [9][10][11][12]. The first organisms to colonize a stone surface to produce the so-called "subaerial biofilms" [13] are those that do not require organic foodstuffs -the phototrophic algae and cyanobacteria (see, for example, [14][15][16]). Autotrophic bacteria, such as those that utilize inorganic nitrogen or sulfur as energy sources, may also colonize at this time.…”

Section: Colonization Of Stone By Microorganismsmentioning

confidence: 99%

Influence of Environment on Microbial Colonization of Historic Stone Buildings with Emphasis on Cyanobacteria

Gaylarde

2020

Heritage

View full text Add to dashboard Cite

Microbial cells that produce biofilms, or patinas, on historic buildings are affected by climatic changes, mainly temperature, rainfall and air pollution, all of which will alter over future decades. This review considers the colonization of stone buildings by microorganisms and the effects that the resultant biofilms have on the degradation of the structure. Conservation scientists require a knowledge of the potential effects of microorganisms, and the subsequent growth of higher organisms such as vascular plants, in order to formulate effective control strategies. The vulnerability of various structural materials (“bioreceptivity”) and the ways in which the environmental factors of temperature, precipitation, wind-driven rain and air pollution influence microbial colonization are discussed. The photosynthetic microorganisms, algae and cyanobacteria, are acknowledged to be the primary colonizers of stone surfaces and many cyanobacterial species are able to survive climate extremes; hence special attention is paid to this group of organisms. Since cyanobacteria require only light and water to grow, can live endolithically and are able to survive most types of stress, they may become even more important as agents of stone cultural property degradation in the future.

show abstract

Nanoparticles Applied to Stone Buildings

Cited by 24 publications

References 109 publications

Photocatalytic TiO2-Based Nanostructured Materials for Microbial Inactivation

Photocatalytic TiO2-Based Nanostructured Materials for Microbial Inactivation

Cohesion Gain Induced by Nanosilica Consolidants for Monumental Stone Restoration

Influence of Environment on Microbial Colonization of Historic Stone Buildings with Emphasis on Cyanobacteria

Contact Info

Product

Resources

About