About: TiO2 Powders Synthesized by Pressurized Fluid Extraction and Supercritical Drying: Effect of Water and Methanol on Structural Properties and Purity

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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 8C and the presence of brookite crystallites even up to 600 8C. The correlation between Raman FWHM and XRD crystallite size was not influenced by the presence of organic phase and was more sensitive for anatase Eg band 647 cm-1. 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 8C and the presence of brookite crystallites even up to 600 8C. The correlation between Raman FWHM and XRD crystallite size was not influenced by the presence of organic phase and was more sensitive for anatase Eg band 647 cm-1. (en)
Title	TiO2 Powders Synthesized by Pressurized Fluid Extraction and Supercritical Drying: Effect of Water and Methanol on Structural Properties and Purity TiO2 Powders Synthesized by Pressurized Fluid Extraction and Supercritical Drying: Effect of Water and Methanol on Structural Properties and Purity (en)
skos:prefLabel	TiO2 Powders Synthesized by Pressurized Fluid Extraction and Supercritical Drying: Effect of Water and Methanol on Structural Properties and Purity TiO2 Powders Synthesized by Pressurized Fluid Extraction and Supercritical Drying: Effect of Water and Methanol on Structural Properties and Purity (en)
skos:notation	RIV/67985858:_____/12:00380909!RIV13-GA0-67985858
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(GP104/09/P290), Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Matějová, Lenka Šolcová, Olga Fajgar, Radek
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	174508
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/12:00380909
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	oxides; sol-gel chemistry; X-ray diffraction (en)
http://linked.open.../riv/klicoveSlovo	sol-gel chemistry oxides X-ray diffraction
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[43553DED8B3C]
http://linked.open...i/riv/nazevZdroje	Materials Research Bulletin
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Innovative preparation of nanocrystalline metal oxides with high-ordered mesoporous structure by extraction techniques
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Cajthaml, Tomáš Fajgar, Radek Matějová, Lenka Šolcová, Olga Matěj, Z.
http://linked.open...ain/vavai/riv/wos	000311865200082
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	0025-5408
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.materresbull.2012.06.062

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