采用等体积浸渍法制备MnO₂-CuO/Y催化剂，考察组分质量分数对常温催化臭氧氧化甲苯性能的影响。利用X射线衍射、N₂吸附-脱附、氢气程序升温还原、甲苯吸附等分析方法对催化剂结构进行表征，以甲苯转化率维持在95%以上的时间（t₉₅）为指标对催化性能进行评价。结果表明，当活性组分MnO₂和CuO总负载量为10%且MnO₂与CuO质量比为3∶2时，6% MnO₂-4% CuO/Y催化剂具有相对较高的比表面积和孔容积及较好的甲苯吸附性能，MnO₂和CuO之间存在相互作用，形成固溶体，促进氧化还原性能的提高。因此，在常温催化臭氧氧化甲苯反应中，6% MnO₂-4% CuO/Y催化剂表现出较高的反应活性，t₉₅为260 min，CO_x选择性为85.4%，CO₂与CO摩尔比为5.36。

MnO₂-CuO/Y catalysts are prepared by incipient-wetness impregnation method with Y molecular sieve as the carrier.The influences of the contents of MnO₂ and CuO on the performance of the catalysts in catalytic ozonation of toluene at room temperature are investigated.XRD,BET,H₂-TPR and toluene adsorption techniques are employed to characterize the catalysts structure.The time (t95) when toluene conversion rate is maintained above 95% is used as index to evaluate the performance of catalyst.Results reveal that 6% MnO₂-4% CuO/Y catalyst shows a larger surface area and pore volume,a better toluene adsorption performance when the mass ratio of MnO₂：CuO is 3：2 and the total loading amount of MnO₂ and CuO is 10%.There exists an interaction between MnO₂ and CuO,causing the formation of Mn-O-Cu solid solution,which improves the reduction property of 6% MnO₂-4% CuO/Y catalyst.Thus,6% MnO₂-4% CuO/Y catalyst exhibits a high catalytic activity in ozonation of toluene at room temperature,showing that t95 is 260 min,CO_x selectivity is 85.4% and the molar ratio of CO₂：CO is 5.36.

黄金花(1987-),女,硕士,高级工程师,主要从事催化净化新材料的研发,huangjinhua15@163.com