Synthesis of niobium oxide nanoparticles by peptization process with hydrogen peroxide.

Abstract

The niobic acid gel was prepared by adding ammonia aqueous solution into NbCl₅ ethanol solution. The niobic acid gel was peptized by H₂O₂ and the peroxo niobic acid sol was obtained. When the niobic acid sol was heated at 348 K for more than 24 h, the crystallized Nb₂O₅ nanoparticles whose average diameter was ca. 8 nm were obtained. The particle size and the specific surface area depended on the concentration of ammonia solution.