Počet záznamů: 1

Thermal reactions in mixtures of micron-sized silicon monoxide and titanium monoxide: redox paths overcoming passivation shells

SYSNO ASEP	0484216
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Thermal reactions in mixtures of micron-sized silicon monoxide and titanium monoxide: redox paths overcoming passivation shells
Tvůrce(i)	Jandová, V. (CZ) Pokorná, D. (CZ) Kupčík, Jaroslav (UACH-T)_{SAI, RID, ORCID} Bezdička, Petr (UACH-T)_{SAI, RID, ORCID} Křenek, T. (CZ) Netrvalová, M. (CZ) Cuřínová, P. (CZ) Pola, J. (CZ)
Zdroj.dok.	Research on Chemical Intermediates. - : Springer - ISSN 0922-6168 Roč. 44, č. 1 (2018), s. 503-516
Poč.str.	14 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Silicon monoxide ; Titanium monoxide ; High-temperature ; Oxygen-transfer reactions ; Titanium suboxides ; Titanium silicide ; Methylene blue depletion
Vědní obor RIV	CA - Anorganická chemie
Obor OECD	Inorganic and nuclear chemistry
Institucionální podpora	UACH-T - RVO:61388980
UT WOS	000419609200030
EID SCOPUS	85028343913
DOI	10.1007/s11164-017-3116-z
Anotace	Silica–titania mixed oxides and composites have been extensively studied, whereas the titanium monoxide (TiO)–silicon monoxide (SiO) counterparts still remain to be explored. Here, we report on structural changes in heated SiO–TiO mixtures. The changes in composition in intimately mixed μm-sized particles of TiO and SiO heated at 1000 °C were examined by FTIR, UV–Vis and Raman spectroscopy, X-ray diffraction and electron (SEM and TEM) microscopy. They are shown to involve depletion of crystalline TiO and formation of titanium suboxides (Ti2.5O3, Ti2O3), rutile, elemental silicon, titanium silicide Ti5Si3 and amorphous binary SiOx, TiOx and ternary SixTiyOz nano-structures. These constituents of the developed Si/Ti/O composite are explained by SiO disproportionation, reduction of TiO by silicon, oxygen transfer (redox) reactions between TiOx and SiOx species and the combination of Ti and Si to obtain titanium silicide. The produced Si/Ti/O composite absorbs visible light and its solar-light photocatalytic activity in decolorization of methylene bBlue is compared to that of the unheated SiO, TiO and Ti5Si3 powders.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2019

Počet záznamů: 1