TiO2-based nanopowders and thin films for photocatalytical applications

Radecka, M.; Rekas, M.; Kusior, E.; Zakrzewska, K.; Heel, Andre; Michalow, K. A.; Graule, T.

doi:10.1166/jnn.2010.1865

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	TiO2-based nanopowders and thin films for photocatalytical applications
Authors:	Radecka, M. Rekas, M. Kusior, E. Zakrzewska, K. Heel, Andre Michalow, K. A. Graule, T.
DOI:	10.1166/jnn.2010.1865
Published in:	Journal of Nanoscience and Nanotechnology
Volume(Issue):	10
Issue:	2
Page(s):	1032
Pages to:	1042
Issue Date:	2010
Publisher / Ed. Institution:	American Scientific Publishers
ISSN:	1533-4899 1533-4880
Language:	English
Subjects:	TiO2; Nanopowders; Thin films; Band gap; Photocatalysis
Subject (DDC):	540: Chemistry
Abstract:	TiO2-based nanopowders are elaborated by flame spray synthesis, FSS from organic precursors of titanium and chromium with the Cr content changing from 0 to 15 at.%. Well-crystallized nanopowders with high specific surface area SSA reaching 107 m2/g for undoped TiO2 and 177 m2/g for TiO2+15 at.% Cr are obtained. Thin films are deposited by rf reactive sputtering from metallic Ti and Ti-Cr targets in Ar+O2 flow controlled atmosphere. The adjustable area of Cr/Ti allows to obtain up to 16 at.% Cr in TiO2 thin films. X-ray diffraction, transmission electron spectroscopy, TEM, atomic force microscopy, AFM and optical spectrophotometry over the ultraviolet UV and visible VIS range of the light spectrum have been performed in order to characterize the nanomaterials. The particle size of nanopowders is within the range of 5-42 nm. Anatase is the predominating polymorphic form while the amount of rutile increases with Cr content to reach of about 25 wt.% at 15 at.% Cr. The post-deposition annealing of thin films in air at temperatures from 770 K to 1280 K modifies the phase composition, leads to irreversible transformation from anatase to rutile and affects the surface roughness. Structural and optical properties of TiO2-based nanopowders and thin films are compared. The effect of grain size and the level of chromium doping on the band gap Eg is discussed. Photocatalytic activity of the nanopowders is tested for degradation of methylene blue, MB.
URI:	https://digitalcollection.zhaw.ch/handle/11475/9276
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Materials and Process Engineering (IMPE)
Appears in collections:	Publikationen School of Engineering

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Radecka, M., Rekas, M., Kusior, E., Zakrzewska, K., Heel, A., Michalow, K. A., & Graule, T. (2010). TiO2-based nanopowders and thin films for photocatalytical applications. Journal of Nanoscience and Nanotechnology, 10(2), 1032–1042. https://doi.org/10.1166/jnn.2010.1865

Radecka, M. et al. (2010) ‘TiO2-based nanopowders and thin films for photocatalytical applications’, Journal of Nanoscience and Nanotechnology, 10(2), pp. 1032–1042. Available at: https://doi.org/10.1166/jnn.2010.1865.

M. Radecka et al., “TiO2-based nanopowders and thin films for photocatalytical applications,” Journal of Nanoscience and Nanotechnology, vol. 10, no. 2, pp. 1032–1042, 2010, doi: 10.1166/jnn.2010.1865.

RADECKA, M., M. REKAS, E. KUSIOR, K. ZAKRZEWSKA, Andre HEEL, K. A. MICHALOW und T. GRAULE, 2010. TiO2-based nanopowders and thin films for photocatalytical applications. Journal of Nanoscience and Nanotechnology. 2010. Bd. 10, Nr. 2, S. 1032–1042. DOI 10.1166/jnn.2010.1865

Radecka, M., M. Rekas, E. Kusior, K. Zakrzewska, Andre Heel, K. A. Michalow, and T. Graule. 2010. “TiO2-Based Nanopowders and Thin Films for Photocatalytical Applications.” Journal of Nanoscience and Nanotechnology 10 (2): 1032–42. https://doi.org/10.1166/jnn.2010.1865.

Radecka, M., et al. “TiO2-Based Nanopowders and Thin Films for Photocatalytical Applications.” Journal of Nanoscience and Nanotechnology, vol. 10, no. 2, 2010, pp. 1032–42, https://doi.org/10.1166/jnn.2010.1865.