TiO2 powders synthesized by pressurized fluid extraction and supercritical drying: Effect of water and methanol on structural properties and purity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10126687" target="_blank" >RIV/00216208:11320/12:10126687 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388971:_____/12:00380909 RIV/67985858:_____/12:00380909

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0025540812005016" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0025540812005016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.materresbull.2012.06.062" target="_blank" >10.1016/j.materresbull.2012.06.062</a>

Jazyk výsledku

angličtina

Název v původním jazyce

TiO2 powders synthesized by pressurized fluid extraction and supercritical drying: Effect of water and methanol on structural properties and purity

Popis výsledku v původním jazyce

Pressurized water extraction followed by sub/supercritical methanol drying was used for synthesis of TiO2 from gels prepared by sol-gel technique using Triton X-114 like template. It was proved that pressurized water causes titania crystallization. Subsequent sub/supercritical methanol drying is responsible for total elimination of the rest of organic phase originating from the template. The impact of temperature and pressure modifications on titania purity was more essential for pressurized water extraction. The specific surface area significantly increases with removal of the residual organic phase. Anatase was a dominant crystalline phase. The fraction of minor brookite was in the range 20-30 wt.%. In situ XRD showed stability of titania crystallites size up to 300 degrees C and the presence of brookite crystallites even up to 600 degrees C. The correlation between Raman FWHM and XRD crystallite size was not influenced by the presence of organic phase and was more sensitive for anat

Název v anglickém jazyce

TiO2 powders synthesized by pressurized fluid extraction and supercritical drying: Effect of water and methanol on structural properties and purity

Popis výsledku anglicky

Pressurized water extraction followed by sub/supercritical methanol drying was used for synthesis of TiO2 from gels prepared by sol-gel technique using Triton X-114 like template. It was proved that pressurized water causes titania crystallization. Subsequent sub/supercritical methanol drying is responsible for total elimination of the rest of organic phase originating from the template. The impact of temperature and pressure modifications on titania purity was more essential for pressurized water extraction. The specific surface area significantly increases with removal of the residual organic phase. Anatase was a dominant crystalline phase. The fraction of minor brookite was in the range 20-30 wt.%. In situ XRD showed stability of titania crystallites size up to 300 degrees C and the presence of brookite crystallites even up to 600 degrees C. The correlation between Raman FWHM and XRD crystallite size was not influenced by the presence of organic phase and was more sensitive for anat

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GP104%2F09%2FP290" target="_blank" >GP104/09/P290: Inovativní příprava nanokrystalických kovových oxidů s vysoce uspořádanou mezoporézní strukturou pomocí extrakčních technik</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Materials Research Bulletin

ISSN

0025-5408

e-ISSN

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Svazek periodika

47

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

3573-3579

Kód UT WoS článku

000311865200082

EID výsledku v databázi Scopus

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