Reverse Micelles Directed Synthesis of TiO2-CeO2 Mixed Oxides and Investigation of Their Crystal Structure and Morphology

Matějová, Lenka; Valeš, V.; Fajgar, Radek; Matěj, Z.; Holý, V.; Šolcová, Olga

doi:https://dx.doi.org/10.1016/j.jssc.2012.11.013

Počet záznamů: 1

Reverse Micelles Directed Synthesis of TiO2-CeO2 Mixed Oxides and Investigation of Their Crystal Structure and Morphology

1.

SYSNO ASEP	0386079
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Reverse Micelles Directed Synthesis of TiO2-CeO2 Mixed Oxides and Investigation of Their Crystal Structure and Morphology
Tvůrce(i)	Matějová, Lenka (UCHP-M)_{RID, ORCID, SAI} Valeš, V. (CZ) Fajgar, Radek (UCHP-M)_{RID, ORCID, SAI} Matěj, Z. (CZ) Holý, V. (CZ) Šolcová, Olga (UCHP-M)_{RID, ORCID, SAI}
Zdroj.dok.	Journal of Solid State Chemistry. - : Elsevier - ISSN 0022-4596 Roč. 198, FEB (2013), s. 485-495
Poč.str.	11 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	titania–ceria ; cerium titanate ; sol-gel preparation ; reverse micelle ; X-ray diffraction ; Raman spectroscopy
Vědní obor RIV	CI - Průmyslová chemie a chemické inženýrství
CEP	GA203/09/1117 GA ČR - Grantová agentura ČR
	TA01020804 GA TA ČR - Technologická agentura ČR
Institucionální podpora	UCHP-M - RVO:67985858
UT WOS	000314320800069
DOI	10.1016/j.jssc.2012.11.013
Anotace	The synthesis of TiO2–CeO2 mixed oxides based on the sol–gel process controlled within reverse micelles of non-ionic surfactant Triton X-114 in cyclohexane is reported. The crystallization, phase composition, trends in nanoparticles growth and porous structure properties are studied as a function of Ti:Ce molar composition and annealing temperature by in-situ X-ray diffraction, Raman spectroscopy and physisorption. The brannerite-type CeTi2O6 crystallizes as a single crystalline phase at Ti:Ce molar composition of 70:30 and in the mixture with cubic CeO2 and anatase TiO2 for composition 50:50. At Ti:Ce molar ratios 90:10 and 30:70 the mixtures of TiO2 anatase, rutile and cubic CeO2 appear. In these mixtures TiO2 rutile is formed at higher temperatures than conventionally. Additionally, the amount of a present amorphous phase in individual mixtures was estimated from diffraction data. The porous structure morphology depends both on molar composition and annealing temperature. This is correlated with the presence of carbon impurities of different character.
Pracoviště	Ústav chemických procesů
Kontakt	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Rok sběru	2013

Počet záznamů: 1