Adsorption Properties of an Aluminum Powder Modified with Vanadium Pentoxide

摘要

The adsorption properties of an unmodified ASD-4 aluminum powder and the powder modified with a V2O5 hydrogel are studied via low-temperature nitrogen adsorption. Special purity grade nitrogen is used as the adsorbate. Adsorption isotherms are measured, the specific surface area and porosity of the powders are calculated, and the results from morphological studies are described. The dependence of the structural and adsorption properties of the nanopowders on their composition is shown. Due to the island structure of the xerogel, the specific surface area of the modified aluminum powder is greater than that of the unmodified material by several tens of times. The specific surface areas of the ASD-4 and ASD-4-1% V samples are 0.6511 and 16.8752 m(2)/g, respectively. It is found that the layered structure of the deposited xerogel ensures the formation of mesopores with a size of 45 angstrom in the modified sample.