Effect of Tetrahedrally Coordinated Al on the Surface Acidity of Mg-Al Binary Mixed Oxides.

ABSTRACT: Metal oxides (MOs) having Mg and Al with Mg/Al ratios of 1, 2, 3, and 4 were synthesized via calcination of the layered double hydroxides (LDH). The X-ray diffraction analysis revealed that all the MO consisted of periclase (MgO) crystallite with comparable crystallinity regardless of the metal ratio. According to the ²⁷Al magic-angle spinning nuclear magnetic resonance, the phase transformation from LDH to MO upon calcination facilitated the evolution of the Al³⁺ ions with unsaturated coordination at the surface of MO. The specific surface area values of MOs were not significantly different from each other, ranging between 100 and 200 m²/g, suggesting that the metal ratio did not strongly influence the porous structure of MO. The temperature-dependent deso

SUBMITTER: Chandrabose V 

PROVIDER: S-EPMC10459910 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature