Effects of calcination atmosphere and temperature on phase evolution of coprecipitated Ti-V-O oxides

• Published in: Electronic materials letters Vol. 7; no. 4; pp. 327 - 331
• Main Authors: Park, Min-Woo, Kwon, Hye-Jin, Lee, Joo-Sin, Park, Ju-Cheol, Kim, Jong-Heon, Kim, Chang-Gyu
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.12.2011; 대한금속·재료학회
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed Matter Physics; Materials Science; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; 전자/정보통신공학; coprecipitation; Calcination; vanadium-doped titania; anatase; rutile
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-011-0430-2

Ti 1−x V x O 2 (0 ≤ x ≤ 0.5) oxides were produced by a coprecipitation process using TiCl 4 and VOCl 3 as starting materials. As-precipitated gels were calcined at 500∼800°C, either in a vacuum or oxygen atmosphere. Effects of the calcination atmosphere and temperature on the phase transition of crystalline Ti-V-O oxides were studied. Calcination in an oxygen atmosphere produced Ti-V-O oxides, which are mixtures of TiO 2 and V 2 O 5 oxides formed for all the calcination temperatures. Calcinations at 800°C in vacuum resulted in the formation of a rutile Ti 1−x V x O 2 single phase for all compositions of vanadium. A significant portion of vanadium ions is incorporated into the TiO 2 lattice, which consistently decreases the lattice parameters of the rutile Ti 1−x V x O 2 phase as the vanadium addition increases.