Abstract: | X-ray powder diffraction, DTA, FT-IR spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), nitrogen
adsorption, and mercury porometry were used to characterize samples prepared as a result of mechanochemical treatment (MCT)
of a V2O5/(NH4)2Mo2O7 (V/Mo = 0.7/0.3) composition in water, ethanol, and air, as well as after calcining them at temperatures from the range 300–700°C.
The MCT of nonporous powders in water yields porous materials with definite meso- and macropore sizes. Heat treatment in air
at 300–450°C enhances the formation of a molybdenum substitutional solid solution in V2O5 and conserves rather high values of specific surface areas and pore volumes. An increase in heat treatment temperature is
accompanied by the degradation of the solid solution and the formation of a V2MoO8 phase. |