Cerium Organic Coordinated Framework Supported MnO_x And Co₃O₄ Catalysts For Advanced Oxidation Of Phenol In Aqueous Solution

Phenol,which is widely used in chemical,petrochemical and pharmaceutical industries,is the most common organic contaminant in industrial wastewater.Advanced oxidation processes?AOPs?,which exploit highly active species ·OH and SO4-radicals,has become an effective technology for the degradation of phenol in wastewater.Transition metals like manganese and cobalt can activate peroxymonosulfate?PMS?to produce active species to degrade phenol in wastewater.In this work,the catalytic materials MnO_x/Ce-MOF and Co₃O₄/Ce-MOF were prepared by using cerium metal-organic framework?Ce-MOF?as supporting material.The catalysts were characterized using X-ray Powder Diffraction?XRD?,Fourier Transform Infrared?FT-IR?spectroscopy,Scanning Electron Microscopy?SEM?,and Energy Dispersive X-ray?EDX?spectroscopy.The MnO_x/Ce-MOF and Co₃O₄/Ce-MOF were used as heterogeneous catalysts for simulated phenol wastewater treatment.Several parameters including the concentration of PMS,temperature,catalyst dose and initial pH of the phenol wastewater which could affect the catalytic degradation efficiency by the MnO_x/Ce-MOF and Co₃O₄/Ce-MOF were investigated.Co₃O₄/Ce-MOF exhibited high activity in phenol oxidation.100%decomposition could be achieved in 15 min at the conditions of 20 mg/L of phenol,0.1 g/L catalyst and 0.5 g/L PMS.The catalyst also exhibited stable performance after 5 rounds of regeneration.