CuO-MnO_2/Al_2O_3催化臭氧化催化剂的制备、结构表征及性能

Preparation,Structural Characterization and Catalyst Activity of CuO-MnO_2/Al_2O_3 Catalysts

采用浸渍法,以Al2O3为载体制备了氧化铜和二氧化锰复合的双组分负载型金属催化臭氧化催化剂.以松花江水的UV254去除率作为催化剂活性指标,通过正交试验,确定了催化剂的最佳制备条件.实验结果表明,催化剂的最佳制备条件如下:浸渍5h,活性组元体积比为3:1,于90℃干燥2h,于200℃焙烧3h.采用扫描电镜对催化剂的结构进行了表征;通过TG-DTA测试分析了催化剂热分解过程的反应速率、热效应和物质变化过程;运用XPS分析了催化剂表面元素的组成、元素相对含量和元素价态.

A1203 supported CuO-MnO2 catalysts were prepared via immersion method, and their structures were characterized with SEM and XPS techniques. The effect of the preparation methods and conditions on the catalytic activities were studied and the best reaction conditions was obtained. The results show that the cata-lysts of CuO-MnO2/A1203 have very high catalytic activity, when the immersion time is 5 h, the molar ratio of Cu（NO3）2 to Mn（N03）2 is 3： 1, and the catalyst was dried at 70℃ for 2 h and roasted at 200℃ for 3 h.