THE ACHIEVEMENTS OF RUSSIAN SCIENTISTS AND SPECIALISTS
Pages: 18 – 28
UDC 69.001.5
New high performance nanoadditives for photocatalytic concrete: synthesis and study
Authors: FALIKMAN Vyacheslav Ruvimovich, Doct. of Mat. Sci., Full member of Russian Engineering Academy, Professor of MSUCE; bld. 4, Gazetny per. 9, 125009, Russia, Moscow, vfalikman@yandex.ru
VAINER Alexander Yakovlevich, Doct. of Chem., Consultant, Scientific Research Center «Construction»; 61, Ryazansky Prospect, 109428, Russia, Moscow
Extended Abstract: Nanotechnologies open up broad prospects for the creation of nanocatalysts, which are being more and more used in solving many problems associated with the protection of environment. Their behavior is directly related to the unique physical and chemical properties that are provided by quantum size effects, as well as the large specific surface area. It is known that the presence of photo catalysts in the construction segment of nanomaterials is becoming more prominent. One of the most significant achievements of the last years are photo catalytic active cement composites, including cements and concretes produced with the use of nanoparticles of titanium dioxide TiO₂ sensibilized through a nanotechnology . Currently they are widely used in practice to produce selfcleaning structures and to make clean an air of megacities. Further research in the field of development of new high-performance photo catalysts based on TiO₂ nanoparticles seems to be very relevant, because such R&D could significantly improve the technical characteristics of photo catalytic cements and concrete. In this paper an improved method to produce photo catalysts has been proposed. New synthesized products are based on TiO₂ nanoparticles applied on different inert
carriers, including nanosilica. It was showed that these products can be used as a high performance photo catalyst in cement and cement-gypsum composites suitable for the onversion processes of nitric oxide and volatile organic substances, and air purification. It was determined that performance of the cementitious composites containing synthesized samples is 1,5…3,0 times higher than that for the commercial sample of the nanotitanium dioxide. The use of mechanical mixture of nanotitanium dioxide and inert supports is less effective and subjected to the «dilution law», in general.
Key words: titanium dioxide, nanoparticles, inert support, photo catalytic properties,cementitiuos building materials, pollutants.
DOI: dx.doi.org/10.15828/2075-8545-2015-7-1-18-28
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