An Environment-Friendly Method to Catalytically Oxidate NO in Waste Water by Supported Manganese Oxide on Graphite Oxide

摘要

The catalytic oxidation of NO from waste gas was investigated usingadvanced oxidation process based on sulfate radicals. The manganese oxideimmobilized on graphene oxide (GO) can activate peroxymonosulfate (PMS) for theoxidation of NO in water. The Mn_3O_4/GO catalysis system was characterized viaX-ray diffraction (XRD) and scanning electron microscopy (SEM). The resultsshowed that Mn_3O_4 was distributed on GO. The Mn_3O_4/GO catalyst system exhibitedefficient activity for NO oxidation when the Mn_3O_4/GO catalyst has an optimumMn_3O_4 loading. In addition, the best catalytic oxidation can be achieved within 30 minwith pH 4 and 6 mM PMS at 25 °C. Therefore, the results may have significanttechnical implication for utilizing Mn_3O_4/PMS to oxidize NO for offgas treatment.