Investigation into the impact of CeO 2 morphology regulation on the oxidation process of dichloromethane.

Four distinct CeO2 catalysts featuring varied morphologies (nanorods, nanocubes, nanoparticles, and nano spindle-shaped) were synthesized through a hydrothermal process and subsequently employed in the oxidation of dichloromethane (DCM). The findings revealed that the nano spindle-shaped CeO2 exhibited exposure of crystal faces (111), demonstrating superior catalytic oxidation performance for DCM with a T 90 of 337 °C and notably excellent low-temperature catalytic activity ( T 50 = 192 °C). The primary reaction products were identified as HCl and CO2 . Through obvious characterizations, it showed that the excellent catalytic activity presented by CeO2 -s catalyst might be related to the higher oxygen vacancy concentration, surface active oxygen content, and superior redox performance caused by specific exposed crystal planes. Meanwhile, CeO2 -s catalyst owned outstanding stability, reusability, and water inactivation regeneration, which had tremendous potential in practical treatment.