Abstract
In this work, raw MgO was treated hydrothermally at various temperatures to produce the Mg(OH)2 precursors and derived MgO sorbents for NF3 destructive sorption. The results show that the MgO treated hydrothermally at 160 °C exhibited a higher reactivity with utilization percentage of 59.3 % than others for NF3 destruction. Subsequently, the Mg(OH)2 as-formed was in-situ coated hydrothermally by MnOx to prepare the MgO@Mn2O3 sorbent. In contrast to bare MgO, the MgO@Mn2O3 was more active due to the promotional effect of surface Mn2O3 on the fluorination of MgO substrate via a fluorine/oxygen exchange reaction. Importantly, the present MgO@Mn2O3 with a utilization percentage of 64.1 % was highly superior to all the MgO-based sorbents reported so far.
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