Nanoparticles and the BuildingIndustry-A Short Review by Christine Gaylarde in ANOAJ in Lupine Publishers.
Nanoparticles have been used to protect the exteriors of built
structures for many years, with nTiO2 having a major role in the
production of self-cleaning surfaces. Photo catalysis leads to the
liberation of substances such as Reactive Oxygen Species, which can
effectively remove organic contaminants, including the disfiguring
microbial growths, from the surfaces. Light exposure is not essential
for this activity, however some engineered nanoparticles have been
shown to have inherent antimicrobial properties. Other nanometals
have been employed, sometimes together with TiO2, or with
materials such as stone consolidants. A brief review of some recent
research in the area, including ecological problems that can arise
when the particles are released into the environment, is presented.
It is essential that standard testing methods, both for nanoparticle
efficacy and for ecotoxicological effects, be developed.
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