负载型纳米Mn-Fe双金属配合物的制备及催化性能

Preparation of supported nanometer manganese-iron bimetal complexes and catalytic performance

在弱碱性水溶液中的染料采用高级氧化法常规催化剂催化很难将其快速有效地降解。文中以邻菲罗啉(phen)与锰(Ⅱ)和Fe(Ⅲ)通过配位反应合成邻菲罗啉锰铁,将其负载在纳米二氧化锰上,制备一种新型纳米催化剂。通过扫描电镜(SEM)和紫外光谱(UV)对催化剂形貌和结构进行表征。考察了溶液初始p H值,反应温度、反应时间、催化剂用量、过硫酸盐浓度等因素对染料氧化反应的影响。对染料氧化中间体结构进行了分析。实验表明,Mn(Ⅱ)/Fe(Ⅲ)-邻菲罗啉配合物催化弱碱性甲基橙降解效果很好。对甲基橙降解反应动力学进行研究,该反应为二级反应。可应用于处理弱碱性甲基橙染料废水。

The dye was difficult to quickly and efficiently degrade by conventional catalysts under the alkalescence solution by advanced oxidation technology. With phen, manganese sulphate and ferric nitrate as raw material, the Mn （ Ⅱ ）/ Fe （ Ⅲ ） -phen was prepared by complexing method and loaded on the nanometer manganese dioxide. The novel nano catalyst was characterized by SEM and UV. The factors of influence oxidation were investigated including the initial pH, the reaction temperature, the reaction time, the dosage of catalyst, the concentration of persulfate, and the intermediate structure were analyzed. The results show that the effect of Mn（ Ⅱ ）/Fe（ Ⅲ ） -phen heterogeneous catalytic oxidation of methyl orange is very effective under the alkalescence condition. The methyl orange degradation reaction kinetics is studied and the reaction was second order reaction. The Mn（ Ⅱ ）/Fe（ Ⅲ ） - phen is suitable for treatment of methyl orange dye wastewater under the alkaleseence condition.