Ordered crystalline mesoporous γ-alumina fabricated by vacuum-promoted self-assembly and alkaline hydrothermal method

Abstract

1 Ordered crystalline mesoporous -alumina fabricated by vacuum-promoted self-assembly and alkaline hydrothermal method Abstract:As a commonly adopted approach to mesoporous alumina (MA), evaporation induced self-assembly (EISA) method with precursors containing chloride (e.g. AlCl3) faces a challenge to yield an ordered MA with crystalline pore walls because the chloride ion (Cl -) could affect the assembly and crystallization, resulting from the strong coordination of Clto aluminum. Herein, a vacuum-promoted self-assembly and alkaline hydrothermal approach was developed and realized the preparation of ordered crystalline MA from AlCl3. The obtained MA possesses ordered mesoporous structure, crystallized pore walls, narrow pore size distribution, large surface (390 m 2 /g) and shows a superior catalytic performances towards catalytic dehydration of ethanol to ethylene.

Nanocrystalline carbon coated alumina with enhanced phase stability at high temperatures

“…[18][19][20][21][22] At the same time, in a number of recent papers it was shown that the carbon coating can be used for the synthesis of the structured and mesoporous materials based on Al 2 O 3 . 19,23 Earlier we have reported that the carbon coating deposited on the surface of the oxide nanoparticles can act as a nanoreactor shell. On the one hand, such coating can be penetrable for the reactant molecules from the gas 7,10,24,25 or liquid 26 phases making it possible to initiate various catalytic or solid-state reactions inside the nanoreactor.…”

Effect of SDBS on Crystallization Behavior of Pseudoboehmite

“…Alumina plays an important role in the fields catalysts, − ceramics, and fine chemicals . Meanwhile, alumina is also an important raw material in the production of electrolytic aluminum.…”