Kumar, Anuj and Gahtori, Bhasker and Kumar, Neeraj and Awana, V. P. S. and Srivastava, A. K. and Panwar, Neeraj and Kishan , H. and Felner, I. (2009) NANO-VANADIUM DOPING-DRIVEN LOW TEMPERATURE STRUCTURAL PHASE TRANSFORMATION IN TITANIA. Modern Physics Letters B , 23 (29). pp. 3543-3549. ISSN 1793-6640

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Abstract

Synthesis, X-ray diffraction (XRD), morphological, and magnetization studies of nano-vanadium doped TiO2 are reported here. Commercially available anatase nano-TiO2 and nano-vanadium powders were mixed and heat-treated in air at 600°C. X-ray diffraction revealed a complete anatase to rutile phase transformation at low vanadium content of 5%. Samples annealed under different environments such as Ar and O2 also exhibited the same trend. Such a phase transformation at relatively low temperature (600°C) has been explained based on enhanced reactivity between vanadium and TiO2 powders. Scanning electron micrographs elucidated the tunable microstructures from irregular-shaped, in the pristine TiO2 (x=0.0), to well-faceted polyhedra V-doped (x=0.05 to 0.15) samples. Room temperature magnetization results revealed that upto 10% vanadium doping the samples are diamagnetic in nature and exhibit a paramagnetic transition for higher V content which presumably can be attributed to the presence of vanadium pentaoxide observed in the XRD.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s World Scientific Publishing.
Uncontrolled Keywords:	V-doped n-TiO2; X-ray diffraction; scanning electron microscopy; magnetization
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	18 Sep 2012 12:33
Last Modified:	18 Sep 2012 12:33
URI:	http://npl.csircentral.net/id/eprint/572

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