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Synergy achieved in silver-TiO2 nanocomposites for the inhibition of biofouling on limestone
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, RIO. Repositorio Institucional Olavide, Building and Environment. Vol. 141, pp. 80-90.
- Publication Year :
- 2018
- Publisher :
- Elsevier, 2018.
-
Abstract
- Biodeterioration of stone monuments is estimated to be as high as 20¿30% of the total degradation suffered by Cultural Heritage constructions. With regard to this problem, bactericidal treatments are mainly based on cleaning. These processes, while effective in the short term, require frequent reapplications increasing potential damages to the monument. Silver nanoparticles offer many advantages over traditionally employed products, such as their prolonged biocide efficacy and their low toxicity to humans and environment. The aim of this study was to evaluate the applicability and effectiveness of seven nanocomposite treatments based on titanium dioxide and/or silver nanoparticles to prevent biodeterioration of limestone monuments. These nanocomposites were characterized by UV¿Visible spectrophotometry, Dynamic Light Scattering and Electron Microscopy. To assess their bactericidal activity, accelerated weathering tests were performed on limestones from the quarry of Utrera, a source widely employed in such iconic monuments as the Cathedral of Seville (Spain). Furthermore, the samples of biopatina employed in our assays stemmed from the façades of historical buildings from Seville. Our results show that silver and titanium dioxide nanocomposites stabilized by citrate achieve a high biocide effect while maintaining color alterations at a low level.<br />Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide<br />Instituto de Ciencia de Materiales de Sevilla<br />Preprint
- Subjects :
- 0301 basic medicine
Biocide
Environmental Engineering
Materials science
Silver-titanium dioxide nanocomposite
030106 microbiology
Geography, Planning and Development
02 engineering and technology
Conservation and restoration
Silver nanoparticle
Conservation
Biofouling
03 medical and health sciences
chemistry.chemical_compound
Civil and Structural Engineering
Nanocomposite
Low toxicity
Metallurgy
Building and Construction
Biopatina
021001 nanoscience & nanotechnology
Limestone
Stone biodeterioration
chemistry
Titanium dioxide
0210 nano-technology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, RIO. Repositorio Institucional Olavide, Building and Environment. Vol. 141, pp. 80-90.
- Accession number :
- edsair.doi.dedup.....99990781eefe3d9cf427057751825b75