Sol-Gel-Derived Sb-Doped SnO_2 Nanoparticles Controlled in Size by Nb_2O_5

摘要

Nanocrystalline Sb-doped SnO_2 particles were prepared by sol-gel and their particle growth was controlled by niobium oxide. In the present synthesis, SnCl_4 and SbCl_3, as precursors, were dissolved and hydrolyzed in ethylene glycol at 80-120 ℃, and further 0.1 mol.-% Nb_2O_5 through its precursor NbCl_5 was mixed to the above solution. The mixture was then dried at 120-150 ℃ and calcinated at 600 ℃ for 2 hours. By XRD and TEM, Sb-doped SnO_2 nanoparticles were highly crystalline and their mean crystal size was ca.10-20 nm with narrow particle size distribution. As the addition of antimony increased, the crystallinity and particle size distribution of SnO_2 particles had the trend to decrease.