TiO2负载三氮大环锰配合物催化剂的合成及催化性质

摘要

A new catalyst with high superoxide dismutase(SOD)activity was synthesized by loading three nitro?gen macrocycle manganese complex on the surface of nanoparticles titanium dioxide.The structure was character?ized by infrared spectroscopy,scanning electron microscopy,X-ray diffraction and surface area measurements, and the SOD activity of the catalyst was evaluated using an improved nitrotetrazolium blue chloride(NBT)meth?od. The results show that the shape of the catalyst is hexagon ,and the catalyst exhibits an optimal SOD activity at IC50=0.04 g/L. The inhibition rate of photoreduction of NBT solution keeps above 95%after several cyclic ex?periments,proving that the catalyst has excellent SOD activity.%将三氮大环锰配合物负载于二氧化钛(TiO2)纳米颗粒表面,制备了一种新型具有超氧化物歧化酶(SOD)活性的催化剂.通过红外光谱、扫描电镜、粉末衍射、比表面积测定对催化剂的结构进行了表征,以及通过一种改进的氯化硝基四氮唑蓝(NBT)还原方法评定了该催化剂的SOD活性.结果表明,催化剂材料的形状为六边形片状.该催化剂最佳SOD活性IC50=0.04 g/L.催化剂经过多次循环试验后,对NBT溶液光还原的抑制率仍保持在95%以上,证明催化剂具有优良的SOD活性.