Thermal decomposition study of nanostructured amorphous lithium, sodium and potassium metatitanates

0496483 - ÚACH 2019 RIV NL eng J - Journal Article
Motlochová, Monika - Slovák, V. - Pližingrová, Eva - Klementová, Mariana - Bezdička, Petr - Šubrt, Jan
Thermal decomposition study of nanostructured amorphous lithium, sodium and potassium metatitanates.
Thermochimica Acta. Roč. 670, DEC (2018), s. 148-154. ISSN 0040-6031. E-ISSN 1872-762X
R&D Projects: GA TA ČR(CZ) TJ01000154; GA MŠMT(CZ) LM2015073
Institutional support: RVO:61388980
Keywords : Evolved gas analysis * Lithium, sodium and potassium titanates * Metatitanates * Rod-shaped materials * Thermal analysis
OECD category: Inorganic and nuclear chemistry
Impact factor: 2.251, year: 2018

A new method of synthesis of advanced hydrated metatitanate pseudomorphs obtained via extraction of sulfate ions from the crystals of titanyl sulfate dihydrate and their replacement with hydroxyl groups of NaOH, LiOH and KOH solutions leaving the Ti-O framework untouched has been proposed. The resulting materials exhibit specific structural properties, which were determined by a number of methods, including scanning and transmission electron microscopy, X-ray diffraction and thermal analysis coupled with mass spectrometry. It was observed that while material precipitated by KOH is thermally stable up to 150 °C, the decomposition of LiOH and NaOH materials starts right at the beginning of the heating. With the increasing temperature, the amorphous materials start to crystallize into various lithium, sodium and potassium titanates and furthermore the growth of larger crystals and nanowhiskers on rods during the crystallization process was observed and discussed.
Permanent Link: http://hdl.handle.net/11104/0289248