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The effect of different atmospheres on structural changes of titanate nanotubes during heating
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SYSNO ASEP 0473864 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of different atmospheres on structural changes of titanate nanotubes during heating Author(s) Václavů, T. (CZ)
Rudajevová, A. (CZ)
Václavů, M. (CZ)
Daniš, S. (CZ)
Popelková, Daniela (UMCH-V)
Kužel, R. (CZ)Source Title Journal of Thermal Analysis and Calorimetry. - : Akadémiai Kiadó - ISSN 1388-6150
Roč. 128, č. 2 (2017), s. 779-785Number of pages 7 s. Language eng - English Country HU - Hungary Keywords titanate nanotubes ; X-ray diffraction ; thermal analysis Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Institutional support UMCH-V - RVO:61389013 UT WOS 000399242400016 EID SCOPUS 85001819594 DOI 10.1007/s10973-016-5980-y Annotation Thermal stability of titanate nanotubes (Ti-NT) was studied in temperature range from room temperature up to 1000 °C in three different atmospheres—in air, vacuum and helium—and differences were observed. In air, vacuum and helium, the release of adsorbed and crystal water was detected in temperatures up to 200 °C. Transformation of the initial structure to anatase form of TiO2 was found independently of the atmosphere used. But in air the transformation to anatase occurred at lower temperature. The difference between these atmospheres was approximately 100 °C. However, only in air, the transformation to sodium hexatitanate and rutile form of TiO2 occurred at higher temperatures. In vacuum, only the anatase phase was detected up to 800 °C. In helium, the transformation to rutile was observed but not to sodium hexatitanate. The changes of the initial structure of Ti-NT during the elevation of temperature were studied by combination of in situ powder X-ray diffraction, differential scanning calorimetry, thermal gravimetric analysis and mass spectroscopy. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2018
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