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Pyrolysis mechanism of aliphatic amines bound to titania nanoparticles after H2O2 oxidation
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SYSNO ASEP 0564422 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Pyrolysis mechanism of aliphatic amines bound to titania nanoparticles after H2O2 oxidation Author(s) Komárková, Bára (UACH-T) RID, SAI, ORCID
Mattonai, M. (IT)
Degano, I. (IT)
Slovák, V. (CZ)Number of authors 4 Article number 105761 Source Title Journal of Analytical and Applied Pyrolysis. - : Elsevier - ISSN 0165-2370
Roč. 168, NOV (2022)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords Aliphatic amines ; Analytical pyrolysis ; Catalytic oxidation ; Multi-shot pyrolysis ; Peroxotitanates ; TiO nanoparticles 2 Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry R&D Projects LM2018124 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UACH-T - RVO:61388980 UT WOS 000889942600008 EID SCOPUS 85141392384 DOI https://doi.org/10.1016/j.jaap.2022.105761 Annotation Organic compounds bound to peroxotitanates can influence the photocatalytic activity of TiO2 nanoparticles (NPs) obtained by subsequent annealing. Knowledge of how this influence plays out is fundamental for the development of NPs with desirable catalytic behavior, which can be used for several applications. Thermoanalytical techniques can be used to simulate the annealing process on a small scale, but there is a lack of literature on this topic. This is especially true for nitrogen-containing organic compounds, which are not often used as organic modifiers in NP synthesis. Here, we present a multianalytical study of the pyrolytic behavior of the organic fraction of amine-functionalized titania NPs after peroxide treatment (namely peroxotitanate nanoparticles modified with aliphatic amines). The study was carried out by TGA-MS, evolved gas analysis-mass spectrometry (EGA-MS) and double-shot analytical pyrolysis-GC-MS. The most abundant peaks in the GC-MS profiles obtained after thermal desorption were ascribed to nitriles, unsaturated hydrocarbons, and oxygenated compounds, whose total relative areas accounted for almost 100% for DPA and up to 70% for the other amines. This indicated that the presence of an N-Ti bond modulated the oxidating effect of hydrogen peroxide. Pyrolysis of the residual organic fraction on oxidized NPs underwent coupling reactions that led to the formation of aromatic species and, most interestingly, heteroaromatic compounds. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.jaap.2022.105761
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