Synthesis and characterization of TiO2 nanocrystalline powder prepared by homogeneous precipitation using urea
Identifieur interne : 001710 ( Main/Exploration ); précédent : 001709; suivant : 001711Synthesis and characterization of TiO2 nanocrystalline powder prepared by homogeneous precipitation using urea
Auteurs : Dong Seok Seo [Corée du Sud] ; Hwan Kim [Corée du Sud] ; Hang Chul Jung [Corée du Sud] ; Jong Kook Lee [Corée du Sud]Source :
- Journal of Materials Research [ 0884-2914 ] ; 2003-03.
Abstract
TiO2 nanocrystalline powder was synthesized by homogeneous precipitation method using urea, and its characteristics were investigated through comparison with the powder prepared by conventional precipitation using ammonia. The homogeneously precipitated powder was anatase-type TiO2 with a particle size of 4–5 nm and a uniform spherical particle shape. The fact that the transformation from anatase to rutile was prohibited at elevated temperatures in the homogeneously precipitated powder can be useful to prepare anatase-type TiO2 thin films by calcination at high temperatures. With increasing heat-treatment temperature, the particle size of the homogeneously precipitated powder was smaller than that of the conventionally precipitated powder, and the particle shape was more uniform. The homogeneously precipitated powder showed good photocatalytic activity for Ag ion photoadsorption because the powder had both good crystallinity and a large specific surface area of 280 m2/g.
Url:
DOI: 10.1557/JMR.2003.0074
Affiliations:
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Mater. Res.</title><idno type="ISSN">0884-2914</idno><idno type="eISSN">2044-5326</idno><imprint><publisher>Cambridge University Press</publisher><pubPlace>New York, USA</pubPlace><date type="published" when="2003-03">2003-03</date><biblScope unit="volume">18</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="571">571</biblScope><biblScope unit="page" to="577">577</biblScope></imprint><idno type="ISSN">0884-2914</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0884-2914</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">TiO2 nanocrystalline powder was synthesized by homogeneous precipitation method using urea, and its characteristics were investigated through comparison with the powder prepared by conventional precipitation using ammonia. The homogeneously precipitated powder was anatase-type TiO2 with a particle size of 4–5 nm and a uniform spherical particle shape. The fact that the transformation from anatase to rutile was prohibited at elevated temperatures in the homogeneously precipitated powder can be useful to prepare anatase-type TiO2 thin films by calcination at high temperatures. With increasing heat-treatment temperature, the particle size of the homogeneously precipitated powder was smaller than that of the conventionally precipitated powder, and the particle shape was more uniform. The homogeneously precipitated powder showed good photocatalytic activity for Ag ion photoadsorption because the powder had both good crystallinity and a large specific surface area of 280 m2/g.</div></front></TEI><affiliations><list><country><li>Corée du Sud</li></country><region><li>Région capitale de Séoul</li></region><settlement><li>Séoul</li></settlement><orgName><li>Université nationale de Séoul</li></orgName></list><tree><country name="Corée du Sud"><region name="Région capitale de Séoul"><name sortKey="Seo, Dong Seok" sort="Seo, Dong Seok" uniqKey="Seo D" first="Dong Seok" last="Seo">Dong Seok Seo</name></region><name sortKey="Jung, Hang Chul" sort="Jung, Hang Chul" uniqKey="Jung H" first="Hang Chul" last="Jung">Hang Chul Jung</name><name sortKey="Kim, Hwan" sort="Kim, Hwan" uniqKey="Kim H" first="Hwan" last="Kim">Hwan Kim</name><name sortKey="Lee, Jong Kook" sort="Lee, Jong Kook" uniqKey="Lee J" first="Jong Kook" last="Lee">Jong Kook Lee</name><name sortKey="Lee, Jong Kook" sort="Lee, Jong Kook" uniqKey="Lee J" first="Jong Kook" last="Lee">Jong Kook Lee</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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