铈锰复合氧化物高效催化分解臭氧OA北大核心CSTPCD

The cerium-manganese oxide catalyst was prepared by dopping cerium into the manganese oxide octahedral molecular sieve(OMS-2).The physical and chemical properties of the catalyst were characterized by XRD,SEM,H2-TPR,and XPS.The removal effect of the catalyst on high concentration ozone under high humidity was simulated.The experimental results demonstrate that the addition of Ce to OMS-2 induces a transformation in the crystal lattice structure of OMS-2.The CeMn4 with a Mn/Ce atomic ratio of 4 exhibits the highest specific surface area,the smallest particle size,and the highest concentration of oxygen vacancies,which contribute to its exceptional redox properties.Under the conditions of humidity 90%,volume space velocity 700 000 h-1,and reaction time 420 min,a stable ozone decomposition rate exceeding 95%can be achieved,while also demonstrating strong water resistance.The cerium-manganese composite oxide is poised to become an ideal material for catalytic decomposition of ozone in industry.