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

Kód výsledku v IS VaVaI

RIV/67985858:_____/13:00386079 - isvavai.cz

Nalezeny alternativní kódy

RIV/00216208:11320/13:10133652

Výsledek na webu

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

DOI - Digital Object Identifier

10.1016/j.jssc.2012.11.013

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 temperaturesthan 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 co

Název v anglickém jazyce

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

Popis výsledku anglicky

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 temperaturesthan 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 co

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

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Svazek periodika

198

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

485-495

Kód UT WoS článku

000314320800069

EID výsledku v databázi Scopus

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