Nano-vanadium doping-driven low temperature structural phase transformation in titania

Anuj Kumar*, Bhasker Gahtori, Neeraj Kumar, V. P.S. Awana, A. K. Srivastava, Neeraj Panwar, H. Kishan, I. Felner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)3543-3549
Number of pages7
JournalModern Physics Letters B
Volume23
Issue number29
DOIs
StatePublished - 20 Nov 2009

Keywords

  • Magneti-zation
  • Scanning electron microscopy
  • V-doped n-TiOX-ray di raction

Fingerprint

Dive into the research topics of 'Nano-vanadium doping-driven low temperature structural phase transformation in titania'. Together they form a unique fingerprint.

Cite this