Preparation and investigation of co-doped VO2 powders

In this paper, tungsten-and molybdenum-doped vanadium dioxide (VO[Formula: see text] powders were prepared by hydrothermal reaction using vanadium pentoxide (V 2 O[Formula: see text], H 2 O 2 , white tungstic acid (WPTA) and sodium molybdate (Na 2 MoO[Formula: see text] as raw materials. The microstructure and composition of VO 2 powders were characterized by means of XRD, XPS, DSC and FT-IR. We made a preliminary study on the thermal-induced phase transition properties of powders. The experimental results show that the co-doped samples are monoclinic rutile. Tungsten and molybdenum atoms exist in the lattice at the positive six valence. When the W and M W were 3% and 2%, respectively, the transition temperature of co-doped samples were close to room temperature can reach 25.5 ∘ C.