Effect of Process Parameter on Synthesis of W Doped VO₂-SiO₂ Nano Hybrid Particles by Sol-gel Method

Abstract

W doped VO₂ nano coating on the SiO₂ particles were examined with controlling the process parameter, by sol-gel method. Residual water in VO₂-SiO₂ hybrid sol was evaporated at 150°C, and residual organic matter was burned at 250°C. As a result, VO₂ phase was obtained with the 83 % concentration in Vanadium oxides. Additionally, a tungsten doping method into VO₂-SiO₂ particles was investigated by changing solvents. Using 2-Methoxyethanol for the solvent, W-doped VO₂-SiO₂ particles with the W atomic% of 1.8 were obtained, and the transition temperature of the resulting particles was 53°C.