Effect of amines on (peroxo)titanates: characterization and thermal decomposition

Komárková, Bára; Motlochová, Monika; Slovák, Václav; Ecorchard, Petra; Bezdička, Petr; Bavol, Dmytro; Šubrt, Ján

doi:10.1007/s10973-021-10925-w

Cited by 4 publications

(2 citation statements)

References 60 publications

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“…In argon, the samples underwent a two-step degradation process, involving the release of moisture and decomposition or evaporation of amine, while in air conditions the organic component could be oxidized in an additional third step at even higher temperatures. EGA confirmed the presence of the original amine in the amino-titanates, while the organic parts that reacted with oxygen evolved from the peroxide group to form oxidation products [ 178 ].…”

Section: Applications To Nanoparticles and Nanomaterialsmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

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Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

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Section: Applications To Nanoparticles and Nanomaterialsmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

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“…They also observed that the transformation of TiO 2 from anatase to rutile generally occurs at temperatures above 600 • C. Lu et al [26] investigated the role of mixed salts (ZnO and P 2 O 5 ) in the calcination of metatitanic acid to address the problems of high calcination temperature and long calcination time. Komarkova et al [27] investigated the thermal degradation behavior of amine-containing amorphous (peroxo)titanate in air and argon atmospheres. They found that calcination in an air atmosphere leads to the oxidation of organic components in the reactants, which affects the performance of the product.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study on the Dehydration Behavior of Titanium Dioxide as a Denitration Catalyst Carrier

Li,

Qiu,

et al. 2023

Metals

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The dehydration of titanium dioxide, which is the carrier for denitration catalysts, is a crucial control step in the preparation of functional materials and has an impact on the performance of the product. In this study, the kinetics of the dehydration behavior and reaction mechanism of titanium dioxide were investigated under different atmospheres by measuring the thermal analysis curve of titanium dioxide at different heating rates. The results indicate that the dehydration behavior of the catalyst carrier titanium dioxide is closely related to the calcination atmosphere. The dehydration rate differed for oxygen and no-oxygen atmospheres. Dehydration began quickly in an oxygenated atmosphere and then slowed down towards the end of the reaction, completing slowly in an oxygen-free atmosphere. Kinetic calculations were carried out using modeless and mode function methods. The results show that dehydration of titanium dioxide is consistent with the Avrami–Erofeev equation in an oxygen-containing atmosphere and with the power function rule in an oxygen-free atmosphere, with the process of dehydration being influenced by the formation and growth of crystal nuclei.

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