Ni/Fe/Zr催化剂的制备及其微波催化氧化性能  

Preparation of Ni/Fe/Zr Catalyst and Its Microwave Catalytic Oxidation Performance

作　　者：龙腾锐[1] 尤鑫 林于廉[1] 易洁[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]中国市政工程中南设计研究总院,湖北武汉430010

出　　处：《中国给水排水》2011年第13期83-85,共3页China Water & Wastewater

摘　　要：采用共沉淀法制备Ni/Fe/Zr复合氧化物催化剂,并在微波条件下以H2O2为氧化剂,将其用于处理正丁酸模拟废水,考察该催化剂的活性。正交试验结果表明,在Ni∶Fe=(0∶10)、Zr∶(Fe+Ni)=4∶1、沉淀时间为5 h、干燥时间为6 h、焙烧温度为350℃、焙烧时间为6 h的条件下,所制的催化剂活性最高,此时对模拟废水中TOC的去除率可达75%;Ni∶Fe、Zr∶(Fe+Ni)及焙烧温度这三个因素对催化剂活性的影响特别显著,焙烧时间次之,而干燥时间和沉淀时间无明显影响。另外,上述条件下制备的催化剂稳定性较好,使用17次后处理效果仍无明显下降。对催化剂进行XRD衍射及电镜扫描表征发现,采用共沉淀法制备催化剂时,对催化剂进行掺杂改性可改变其物相,在Fe催化剂中添加Zr可有效提高其催化活性。Ni/Fe/Zr composite oxide catalyst was prepared through co-precipitation, and used to treat n-butyric acid simulated wastewater under microwave and with H2O2 as oxidizing agent, and its activity was investigated. The results of orthogonal experiments show that the optimum conditions are： Ni ： Fe =0 ： 10, Zr ： （Fe ＋ Ni） =4 ： 1, precipitation time of 5 h, drying time of 6 h, calcination temperature of 350 ℃, calcination time of 6 h. Under these conditions, the catalyst has the highest activity, and TOC removal rate is 75%. Ni ： Fe, Zr ： （Fe ＋ Ni） and calcination temperature have a remarkable effect on catalyst activity, calcination time has some effect, drying time and precipitation time have no significant effect. The catalyst has good stability, and the treatment efficiency has no significant change after it is used 17 times. The products are characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results show that doping modification can change catalyst phases, adding Zr into Fe catalyst can improve catalyst activity.

关 键 词：Ni/Fe/Zr复合氧化物催化剂 微波 催化氧化 

分 类 号：X703[环境科学与工程—环境工程]