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Microwave-assisted synthesis and characterization of Ti 1 - XV xO 2 (x = 0.0-0.10) nanopowders

Title
Microwave-assisted synthesis and characterization of Ti 1 - XV xO 2 (x = 0.0-0.10) nanopowders
Authors
Hoang L.H.Van Hai P.Van Hanh P.Hai N.H.Chen X.-B.Yang I.-S.
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
2011
Journal Title
Materials Letters
ISSN
0167-577XJCR Link
Citation
vol. 65, no. 19-20, pp. 3047 - 3050
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Ti 1 - xV xO 2 (x = 0.0-0.10) nanopowders were successfully synthesized by a microwave-assisted sol-gel technique and their crystal structure and electronic structure were investigated. The products were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman and UV-Vis spectroscopy. The results revealed that TiO 2 powders maintained the anatase phase for calcination temperature below 600 °C, but gradually changed to the rutile phase above 800 °C. The formation of the rutile phase was completed at 1000 °C. For Ti 1 - xV xO 2 (x = 0.05) powders, the phase transformation appeared at 600 °C. The absorption edge of Ti 1 - xV xO 2 (x > 0) powders broadened to the visible region with increasing V concentration and a strong visible light absorption was obtained with 10% V doping. V doping and subsequent coexistence of both anatase and rutile phases in our Ti 1 - xV xO 2 nanoparticles are considered to be responsible for the enhanced absorption of visible light up to 800 nm. © 2011 Elsevier B.V. All Rights Reserved.
DOI
10.1016/j.matlet.2011.06.034
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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