Modification of porous α-Al2O3 ceramics by boehmite nanoleaf structures

Abstract

Modification of porous ceramic materials makes it possible to improve their functional characteristics. In this work, we demonstrate the possibility of modifying macroporous Al2O3 ceramics with boehmite nanosheet structures using electroexplosive Al/AlN nanoparticles. To do this, the porous ceramic was impregnated with a suspension of nanoparticles in ethanol, after which the reaction of hydrolysis and oxidation of the nanoparticles fixed in the volume of the porous ceramic was carried out at 60 °C. As a result of the reaction, nanosheet structures of fine-grained boehmite were formed on the ceramic surface. This made it possible to substantially increase the specific surface area of the sample to 25.9 m2/g. and significantly improve the sorption characteristics of macro-simple Al2O3 ceramics in relation to the eosin dye. During the protective action, it was possible to adsorb up to 2.9 mg/g of the dye at a linear flow rate of 0.15 cm/s.