Controlled synthesis of alumina using trialkylaluminum as starting materials

Abstract

Morphologically controlled production of nanomaterials is very important in material chemistry because of the strong influence of materials' structure on their characteristics. In this paper, alumina with various morphologies were synthesized using Me 3 Al and Et 3 Al as starting materials. Aluminum trialkyls were transformed into precursors upon exposure to air with relative humidity of 0-90% and then thermally decomposed yielding white alumina powders. Depending on the starting R 3 Al and conditions of precursor synthesis, aluminum oxide was obtained in the form of separated or agglomerated spherical nanoparticles, porous sponge-like material, worms-and wool balls-like particles. Structural data such as specific surface area, average particle size and average pore size of alumina obtained from Me 3 Al were significantly different than those of alumina synthesized from Et 3 Al. This simple method allows for the production of aluminum oxide without any traces of other metals, which is important for application in electronics. The reaction course of R 3 Al with dioxygen and air moisture and composition of alumina precursors have been discussed.

Synthesis and Bioactivity of Reduced Graphene Oxide/Alumina‐Noble Metal Nanocomposite Flakes

“…) and were slightly higher in comparison with the same nanoparticles deposited on the surface of RGO. It should be noted that the morphology of the nanoparticles in general was similar to pure Al 2 O 3 nanoparticles previously obtained by us, and due to enable examining of Me particles embedded in the Al 2 O 3 nanoparticles, the TEM analysis must be employed.…”