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Thermal stability of titanate nanorods and titania nanowires formed from titanate nanotubes by heating
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SYSNO ASEP 0440935 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Thermal stability of titanate nanorods and titania nanowires formed from titanate nanotubes by heating Tvůrce(i) Brunátová, T. (CZ)
Matěj, Z. (CZ)
Oleynikov, P. (SE)
Vesely, J. (CZ)
Danis, S. (CZ)
Popelková, Daniela (UMCH-V)
Kuzel, R. (CZ)Zdroj.dok. Materials Characterization. - : Elsevier - ISSN 1044-5803
Roč. 98, December (2014), s. 26-36Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova titania nanowires ; titanate nanorods ; X-ray diffraction Vědní obor RIV BM - Fyzika pevných látek a magnetismus Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000347588700004 EID SCOPUS 84908415489 DOI 10.1016/j.matchar.2014.10.008 Anotace The structure of titanate nanowires was studied by a combination of powder X-ray diffraction (XRD) and 3D precession electron diffraction. Titania nanowires and titanate nanorods were prepared by heating of titanate nanotubes. The structure of final product depended on heating conditions. Titanium nanotubes heated in air at a temperature of 850 °C decomposed into three phases - Na2Ti6O13 (nanorods) and two phases of TiO2 - anatase and rutile. At higher temperatures the anatase form of TiO2 transforms into rutile and the nanorods change into rutile nanoparticles. By contrast, in the vacuum only anatase phases of TiO2 were obtained by heating at 900 °C. The anatase transformation into rutile began only after a longer time of heating at 1000 °C. For the description of anisotropic XRD line broadening in the total powder pattern fitting by the program MSTRUCT a model of nanorods with elliptical base was included in the software. The model parameters - rod length, axis size of the elliptical base, the ellipse flattening parameter and twist of the base could be refined. Variation of particle shapes with temperature was found. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2015
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