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Facile Conversion of Electrospun TiO2 into Titanium Nitride/Oxynitride Fibers
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SYSNO ASEP 0350911 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Facile Conversion of Electrospun TiO2 into Titanium Nitride/Oxynitride Fibers Author(s) Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Procházka, Jan (UFCH-W)
Bastl, Zdeněk (UFCH-W) RID, ORCID
Duchoslav, J. (CZ)
Rubáček, L. (CZ)
Havlíček, D. (CZ)
Kavan, Ladislav (UFCH-W) RID, ORCIDSource Title Chemistry of Materials. - : American Chemical Society - ISSN 0897-4756
Roč. 22, č. 13 (2010), s. 4045-4055Number of pages 11 s. Language eng - English Country US - United States Keywords visible-light photocatalysis ; nitrogen doped TiO2 ; thin films Subject RIV CG - Electrochemistry R&D Projects LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) OC09048 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAA400400804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN200100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000279389200027 DOI 10.1021/cm100877h Annotation Nanocrystalline fibrous TiO2 (anatase) was prepared by electrostatic spinning from ethanolic solution of Ti(IV) butoxide, acetylacetone, and poly(vinylpyrrolidone) employing the Nanospider industrial process. These titania fibers were smoothly converted into cubic titanium oxynitride, TiOxNy fibers (a = 4.1930 angstrom) during 4 h at 600 degrees C in ammonia atmosphere. The obtained material is convertible back into TiO2 fibers by heat treatment in air at 500 degrees C. The TiO2 fibers, which were reformed in this way, contain anatase as the main phase. Their follow-up reaction with NH3 at 600 degrees C/2 h leads to a less crystalline oxynitride material with a approximate to 4.173 A, which is close to that of cubic TiO. Three subsequent cycles of this transformation were demonstrated. The described conversions are specific for electrospun anatase fibers only. At the same experimental conditions, other forms of nanocrystalline anatase do not react with ammonia yielding cubic phases. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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