Structural and Surface Acid/Base Properties of Hydrotalcite-Derived MgAlO Oxides Calcined at Varying Temperatures
作者： Jianyi Shen , Mai Tu , Chen Hu , None
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摘要: Abstract This paper describes the influence of calcination temperature on bulk and surface properties MgAlO binary oxide derived from hydrotalcite precursor. MAS 27 Al NMR revealed that significant phase transitions occurred in samples calcined at 673, 873, 1073 K. These seem to be important determining acid/base samples. Microcalorimetric adsorptions NH 3 CO 2 showed acidity these decreases order: γ -Al O >673 K> 873 K≈1073 K, while basicity follows MgO>873 K>1073 K>673 IR spectroscopy sites are mainly Lewis type.
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