Author/Authors :
E. Akbari Chemical Engineering Department - Iran University of Science and Technology, Tehran, Iran , S. M. Alavi Chemical Engineering Department - Iran University of Science and Technology, Tehran, Iran , M. Rezaei Institute of Nanoscience and Nanotechnology - University of Kashan, Kashan, Iran , Z. Montazeri Chemical Engineering Department - Tarbiat Modares University, Tehran, Iran
چكيده لاتين :
The present work explores the synthesis of nanocrystalline MgAl2O4 as a catalyst support for catalytic operation. In perfect normal MgAl2O4 spinel the Mg2+ ions occupy tetrahedral 8a sites and Al3+ ions occupy octahedral 16d sites. In reality some cations are exchanged between the cation sublattices forming pairs of antisite defects and thus a degree of inversion. Mesoporous nanocrystalline of magnesium aluminte with the high specific surface area was prepared using a simple co-precipitation method. The sample was characterized by N2 adsorption/desorption (BET), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The XRD analysis exhibited that the single phase of MgAl2O4 was formed at 700 °C. Moreover, the BET results showed that the high specific surface area (165 m2.gr-1) and perticle size of 11.75 nm. The scanning electron micrograph image showed that the prepared sample mainly consisted of porous agglomerates and results displayed an average particle size of 50 nm for the MgAl2O4.
