. . "222" . . "A low-cost photoactive composite quartz sand/TiO2"@en . . "Vontorov\u00E1, Ji\u0159ina" . "10.1016/j.cej.2013.02.056" . "A low-cost photoactive composite quartz sand/TiO2" . "25.3.2013" . "000319528900055" . "A low-cost photoactive composite quartz sand/TiO2"@en . "RIV/61989100:27640/13:86084575" . . "BE - Belgick\u00E9 kr\u00E1lovstv\u00ED" . "58698" . "I, P(ED1.1.00/02.0070), S" . . . "27640" . "A low-cost photoactive composite quartz sand/TiO2" . . "1385-8947" . . . . . . . "The photoactive quartz sand/TiO2 composites were prepared by thermal hydrolysis of the suspension obtained by addition of quartz sand to a titanyl sulfate solution. The required amount of TiO2 in the prepared composites (i.e 9, 22 and 45 wt. %, respectively) was achieved using a variable titanyl sulfate/quartz ratio. As reference materials, pure TiO2 was prepared using the thermal hydrolysis of the titanyl sulfate solution under the same condition as used during the preparation of composite quartz/TiO2. The composite samples, dried at 105\u00B0C and calcined at temperatures of 500-900\u00B0C, were investigated using X-ray fluorescence spectroscopy, X-ray powder diffraction analysis, transmission electron microscopy, and Fourier transform infrared spectroscopy. Structural ordering of TiO2 particles on the quartz surface was studied using atomistic simulations in a Material Studio modeling environment. Photodegradation activity of the composites was evaluated by the discoloration of Acid Orange 7 aqueous solution. The composite containing 22 wt.% of TiO2 and calcined at 800\u00B0C exhibits the highest photoactivity. Higher and lower amounts of TiO2 led to worse results. The quartz/TiO2 composite is a promising material able to replace pure TiO2 in a wide range of building materials."@en . "RIV/61989100:27640/13:86084575!RIV14-MSM-27640___" . "Tokarsk\u00FD, Jon\u00E1\u0161" . "Mamulov\u00E1 Kutl\u00E1kov\u00E1, Kate\u0159ina" . "photoactivity; nanocomposite; TiO2; quartz sand"@en . . "Neuwirthov\u00E1, Lucie" . . . "10"^^ . . "The photoactive quartz sand/TiO2 composites were prepared by thermal hydrolysis of the suspension obtained by addition of quartz sand to a titanyl sulfate solution. The required amount of TiO2 in the prepared composites (i.e 9, 22 and 45 wt. %, respectively) was achieved using a variable titanyl sulfate/quartz ratio. As reference materials, pure TiO2 was prepared using the thermal hydrolysis of the titanyl sulfate solution under the same condition as used during the preparation of composite quartz/TiO2. The composite samples, dried at 105\u00B0C and calcined at temperatures of 500-900\u00B0C, were investigated using X-ray fluorescence spectroscopy, X-ray powder diffraction analysis, transmission electron microscopy, and Fourier transform infrared spectroscopy. Structural ordering of TiO2 particles on the quartz surface was studied using atomistic simulations in a Material Studio modeling environment. Photodegradation activity of the composites was evaluated by the discoloration of Acid Orange 7 aqueous solution. The composite containing 22 wt.% of TiO2 and calcined at 800\u00B0C exhibits the highest photoactivity. Higher and lower amounts of TiO2 led to worse results. The quartz/TiO2 composite is a promising material able to replace pure TiO2 in a wide range of building materials." . "\u010Capkov\u00E1, Pavla" . "Chemical engineering journal" . . . . "5"^^ . "Mat\u011Bjka, Vlastimil" . "7"^^ . . . "[C16E54608BD0]" . "Kukutschov\u00E1, Jana" .