{"id":800,"date":"2014-02-18T23:33:26","date_gmt":"2014-02-18T19:33:26","guid":{"rendered":"http:\/\/nanobuild.ru\/en_EN\/?p=800"},"modified":"2015-02-18T23:34:17","modified_gmt":"2015-02-18T19:34:17","slug":"nanobuild-1-2015-pages-27-28","status":"publish","type":"post","link":"https:\/\/nanobuild.ru\/en_EN\/nanobuild-1-2015-pages-27-28\/","title":{"rendered":"Nanobuild-1-2015-pages-27-28"},"content":{"rendered":"

THE ACHIEVEMENTS OF RUSSIAN SCIENTISTS AND SPECIALISTS<\/strong><\/p>\n

Pages:\u00a0\u00a0 <\/strong>18 – 28<\/strong><\/p>\n

UDC 69.001.5<\/strong><\/p>\n

New high performance nanoadditives for photocatalytic concrete: synthesis and study<\/strong><\/p>\n

Authors:\u00a0 <\/strong>FALIKMAN Vyacheslav Ruvimovich<\/strong>, Doct. of Mat. Sci., Full member of Russian Engineering Academy, Professor of MSUCE; bld. 4, Gazetny per. 9, 125009, Russia, Moscow, vfalikman@yandex.ru<\/p>\n

VAINER Alexander Yakovlevich<\/strong>, Doct. of Chem., Consultant, Scientific Research Center \u00abConstruction\u00bb; 61, Ryazansky Prospect, 109428, Russia, Moscow<\/p>\n

Extended Abstract<\/strong>: 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 TiO\u2082 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 TiO\u2082 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 TiO\u2082 nanoparticles applied on different inert<\/p>\n

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\u20263,0 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 \u00abdilution law\u00bb, in general.<\/p>\n

Key words:<\/strong> titanium dioxide, nanoparticles, inert support, photo catalytic properties,cementitiuos building materials, pollutants.<\/p>\n

DOI: dx.doi.org\/10.15828\/2075-8545-2015-7-1-18-28<\/strong><\/p>\n

References:<\/em><\/strong><\/p>\n

    \n
  1. Yang J., Chen Ch., Ji H., Ma W., Zhao J. <\/em>Mechanism of TiO2-Assisted Photocatalytic Degradation of Dyes under Visible Irradiation: Photoelectrocatalytic Study by TiO2-Film Electrodes. J. Phys. Chem. B, 2005, 109 (46), pp. 21900\u201321907.<\/li>\n
  2. Falikman V.R., Vainer A.Y. <\/em>Fotokataliticheski aktivnye stroitel\u2019nye materialy s nanochasticami<\/li>\n<\/ol>\n

    dioksida titana \u2013 novaja koncepcija uluchshenija jekologii megapolisov [Photocatalytically active<\/p>\n

    building materials with nanoparticles of titanium dioxide \u2013 a new concept to improve the ecology of big cities]. Voprosy primenenija nanotehnologij v stroitel\u2019stve: Cb. dokl. uchastnikov kruglogo stola [The problems of implementation of nanotechnologies in construction: proc. of the round table]. Moscow, Moscow State University of Civil Engineering, 2009. pp. 35\u201349.<\/p>\n

      \n
    1. Cassar L., Beeldens A., Pimpinelli N., Guerrini G.L. <\/em>Photocatalysis of cementitious materials. International RILEM Symposium on Photocatalysis, Environment and Construction Materials. 2007, pp. 131\u2013145.<\/li>\n
    2. Falikman V., Vajner A., Zverev I. <\/em>New photocatalytic cementitious composites containing modified titanium dioxide nanoparticles. Proceedings of the 3rd Int. Symposium on High Performance Concrete and Nanotechnology for High Performance Construction Materials (Hipermat), 7\u20139 March 2012, Kassel, Germany, pp. 147\u2013152.<\/li>\n
    3. Falikman V.R., Vainer A.Y. <\/em>Photocatalytic cementitious composites \u0441ontaining mesoporous titanium dioxide nanoparticles. Nanotehnologii v stroitel\u2019stve = Nanotechnologies in Construction. 2014, Vol. 6, no. 1, pp. 14\u201326. Available at: http:\/\/nanobuild.ru\/en_EN\/ (date of access: 25.12.14). (In Russian).<\/li>\n
    4. Takeda N., Torimoto Ts., Sampath S., Kuwabata S., Yoneyama H. <\/em>Effect of Inert Supports for Titanium Dioxide Loading on Enhancement of Photodecomposition Rate of Gaseous Propionaldehyde. J. Phys. Chem., 1995, v. 99, \u2116 24, pp. 9986\u20139991.<\/li>\n
    5. Schlossbauer A., Schaffert D., Kecht J., Wagner E., Bein Th. <\/em>Click Chemistry for High-Density Biofunctionalization of Mesoporous Silica. J. Am. Chem. Soc., 2008, 130 (38), pp. 12558\u201312559.<\/li>\n
    6. Beyers E., Cool P., Vansant E.F. <\/em>Anatase formation during the synthesis of mesoporous titania and its photocatalytic effect. J. Phys. Chem. B. 2005. V. 109 \u2116 20, pp. 10081\u201310086.<\/li>\n
    7. ISO 22197-1:2007 Fine ceramics (advanced ceramics, advanced technical ceramics) \u2013 Test method for air-purification performance of semiconducting photocatalytic materials \u2013 Part 1: Removal of nitric oxide.<\/li>\n<\/ol>\n

      Full text in PDF format (27-28)<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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