Number of the records: 1
Thermal decomposition of a peroxopolytitanic acid cryogel: TA/MS study
- 1.
SYSNO ASEP 0471994 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermal decomposition of a peroxopolytitanic acid cryogel: TA/MS study Author(s) Palkovská, Monika (UACH-T) SAI
Slovák, V. (CZ)
Šubrt, Jan (UACH-T) SAI, RID
Boháček, Jaroslav (UACH-T) SAI
Havlín, J. (CZ)Number of authors 5 Source Title Thermochimica Acta. - : Elsevier - ISSN 0040-6031
Roč. 647, JAN (2017), s. 1-7Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords TiO2 thin-films ; peroxo-polytitanic acid ; sol-gel process ; photocatalytic activity ; titanium dioxides Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry R&D Projects GA14-20744S GA ČR - Czech Science Foundation (CSF) Institutional support UACH-T - RVO:61388980 UT WOS 000392787500001 EID SCOPUS 84995780094 DOI 10.1016/j.tca.2016.11.009 Annotation Thermal decomposition of a peroxopolytitanic acid cryogel was followed by simultaneous thermal analysis (TG/DTA) coupled with mass spectrometer (MS) and infrared spectroscope (FTIR). During the decomposition, the evolution of H2O (either residual moisture or as product of dehydration reactions), NH3 (precipitating agent used in preparation), O-2 (decomposition of peroxogroups), SO2 (decomposition of residual sulfates), N-2 (freezing agent in preparation), N2O, NO, NO2 (products of NH3 oxidation) and CO2 (adsorbed from atmosphere) was sought for. It was determined, that the decomposition is a four step process. During the first step, water and carbon dioxide evolve. At around 300 degrees C both N2O and CO2 (m/z = 44) were detected, as confirmed by FTIR spectroscopy. At 430-450 degrees C (depending of heating rate) amorphous phase crystallizes into anatase. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2017
Number of the records: 1