【摘要】 臭氧已成为空气中的首要污染物，亟待治理。采用溶胶-凝胶法以铜、锰金属盐和柠檬酸为原材料合成Cu-Mn臭氧分解催化剂。通过合成方法调节，优化催化剂臭氧分解能力，并在空速200 000 h^-1、湿度80%条件下考察催化剂的臭氧分解性能。利用XRD、SEM、H₂-TPR、O₂-TPD、BET等手段对催化剂进行表征。结果发现，添加碳酸氢钾/钠制备的催化剂为Mn₂O₃和CuMn₂O₄两相混合氧化物，结晶度良好，在反应温度35℃时，反应时间35 h内臭氧分解效率高于95%,具有良好的催化活性与稳定性。表征结果显示，该催化剂比表面积高达199.7 m²·g^-1,具有较好的O₃表面吸附能力，其优良的氧化还原性能可以为O₃分解提供更多参与反应的氧空位，使催化剂获得优良的O₃分解性能。更多还原

【Abstract】 Ozone has already become the primary pollutant of air quality which needed to be regulated urgently especially in summer.In this paper, Cu-Mn catalyst for ozone decomposition was prepared by sol-gel method with copper, manganese salt and citric acid as raw materials.The ozone decomposition capacity of this catalyst was adjusted and also optimized by the synthesis method.What’s more the ozone decomposition performance of the catalyst was investigated under conditions of 200 000 h^-1 space velocity and 80% humidity.The catalysts were characterized by XRD,SEM,H₂-TPR,O₂-TPD and BET.The results show that the catalyst prepared with potassium/sodium bicarbonate was a mixed oxide of Mn₂O₃ and CuMn₂O₄ phases with good crystallinity, and the efficiency of ozone decomposition was higher than 95% at 35 ℃ within 35 h.The catalyst shows good catalytic activity and stability.The characterization results show that this catalyst has good surface adsorption capacity of O₃with a specific surface area up to 199.7 m²·g^-1,and its excellent REDOX performance can provide more oxygen vacancies for the decomposition of O₃ which lead to an excellent decomposition performance.更多还原