Synthesis of tungsten oxides with cellular structure

Abstract

Being exposed to hydrochloric acid vapor, solutions of a surfactant and sodium tungstate form tungstic-acid-based materials with a structure representing a system of interpenetrating hollow spheres 2- 8 μm in diameter constructed from lamellar H 2WO 4 crystals with a thickness of 80-200 nm. The reduction of the tungstic-acid-based material with hydrogen gives rise to the formation of a material based on tung- sten(IV) oxide (WO 2), which retains the initial structure. The adsorption capacity of the tungstic-acid-based materials is determined with respect to benzene. The specific surface area of the obtained materials is 60- 110 m 2/g. © Pleiades Publishing, Ltd., 2012.