Oxide nanoparticles can exhibit unique physical and chemical properties due to their limited size and a high density of corner or edge surface sites. Amomg the metal oxides, Magnesium oxide (MgO) is widely used in the chemical industry as a scrubber for air pollutant gases (CO2 , NOX, SOX) and as a catalyst support. It exhibits a rock salt structure like oxides of other alkaline earth metals. The non-polar (100) face is by far the most stable surface, and particles of MgO usually display a cubic shape.
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