Fabrication of transition temperature controlled W-doped VO₂ nano particles by aqueous solution

抄録

Non-doped and W doped VO₂ powders with nanometer size were synthesized using vanadium oxyisopropoxide and/or tungsten sources with H₂O₂, subsequently by drying and heat-treatment the resulting powder at 400°C for 4 h in H₂/Ar atmosphere. Tungsten pentaetoxide and tungsten chloride were used as tungsten sources. The primary particle sizes of the resulting non-doped VO₂ and W doped VO₂ powder were sub-tens nm. The transition temperature of the non-doped VO₂ was 67.5°C, and that of W doped VO₂ using tungsten pentaetoxide and tungsten chloride precursor solutions were 40.4 and 31.2°C, respectively.