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Growth of the Nano-islands of Barium Aluminum Oxide Nano-spheres on the Surface of Al<sub>2</sub>O<sub>3</sub>-MgO Composite: Preparation and Evaluation of their Catalytic Activity

[ Vol. 11 , Issue. 1 ]

Author(s):

Majid Ghashang, Saeid Jabbarzare, Hamed Tavakoli, Hamid Banisadeghi, Amir Hosein Sokhanvar, Mahmod Lotfi and Akbar Chami   Pages 95 - 100 ( 6 )

Abstract:


The islands like barium aluminum oxide BaAl<sub>2</sub>O<sub>4</sub> nano-spheres were grown on the surface of Al<sub>2</sub>O<sub>3</sub>-MgO composite via oil in water (O/W) micro-emulsion method. Hexane, 2-aminoethanol and ethanol were used as oil phase, non-anionic surfactant and co-surfactant respectively. The synthesized Ba Al<sub>2</sub>O<sub>4</sub> nano-spheres were grown on the surface of Al<sub>2</sub>O<sub>3</sub>-MgO composite and have been characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and Energy-dispersive X-ray spectroscopy (EDAX). The BaAl<sub>2</sub>O<sub>4</sub> nano-spheres grown on the surface of Al<sub>2</sub>O<sub>3</sub>-MgO composite exhibited high catalytic activity for the transformation of cinnamaldehyde, methyl/ethyl acetoacetate and aromatic amines as the starting materials to 1,4-dihydropyridine derivatives.

Keywords:

Al<sub>2</sub>O<sub>3</sub>-MgO composite, BaAl<sub>2</sub>O<sub>4</sub>, barium oxide, 1,4-dihydropyridines, magnesium oxide.

Affiliation:

, , , , , , Department of Chemistry, Faculty of Sciences, Najafabad Branch, Islamic Azad University, Najafabad, P.O. Box: 517, Esfahan, Iran.

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