TY - JOUR
T1 - Nano-vanadium doping-driven low temperature structural phase transformation in titania
AU - Kumar, Anuj
AU - Gahtori, Bhasker
AU - Kumar, Neeraj
AU - Awana, V. P.S.
AU - Srivastava, A. K.
AU - Panwar, Neeraj
AU - Kishan, H.
AU - Felner, I.
PY - 2009/11/20
Y1 - 2009/11/20
N2 - 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.
AB - 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.
KW - Magneti-zation
KW - Scanning electron microscopy
KW - V-doped n-TiOX-ray di raction
UR - http://www.scopus.com/inward/record.url?scp=71249108329&partnerID=8YFLogxK
U2 - 10.1142/S0217984909021600
DO - 10.1142/S0217984909021600
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AN - SCOPUS:71249108329
SN - 0217-9849
VL - 23
SP - 3543
EP - 3549
JO - Modern Physics Letters B
JF - Modern Physics Letters B
IS - 29
ER -