Fe/Co-Ti-O纳米纤维的制备、光催化性能和磁学性能

FABRICATION OF Fe/Co-Ti-O NANOFIBERS:PHOTOCATALYTIC ACTIVITY AND MAGNETIC PROPERTIES

以静电纺聚酯弹性体(TPEE)微纳米纤维为模板,硝酸铁、硝酸钴和钛酸四正丁酯的乙醇溶液为反应前驱体,利用热反应成功制备了具有不同形貌的Fe/Co-Ti-O(Fe2TiO5,Fe2TiO5/CoTiO3,Fe2TiO5/Fe2O3)纳米纤维.分别研究了原料中Co/Fe的比例、焙烧温度和焙烧时间对产物的影响.运用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)、振荡样品磁强计(VSM)研究了所制备纤维的形貌、晶型和磁学性能.并用300W汞灯照射下亚甲基蓝(MB)的降解研究了样品的光催化性能.SEM电镜图谱显示不同条件下得到的纳米纤维形貌具有非常大的差异.XRD测试结果表明,相对于CoTiO3,Fe2TiO5更容易生成,焙烧时间越长,样品中CoTiO3的比例就越大.磁性测试和光催化实验结果表明,制备的样品具有磁学性能和较好的光催化性能,为磁性光催化纳米材料的制备提供了方法和路径.

Using electrospun thermal plastic ester elastomer（TPEE） micro/nano fibers as the template,Fe（NO3）3·9H2O,Co（NO3）2·6H2O and Ti（OBu）4 solved in the anhydrous ethanol solution as the starting materials,Fe/Co-Ti-O（Fe2TiO5,Fe2TiO5/CoTiO3,Fe2TiO5/Fe2O3） nanofibers were successfully fabricated by solvothermal method.The effect of molar ratio of Co/Fe,annealing temperature and annealing time was systematically studied.Scanning electron microscopy（SEM）,X-ray diffraction（XRD） and vibrating sample magnetometer（VSM） were used to characterize the morphology,crystallinity and magnetic properties.Degradation of Methylene Blue（MB） under UV lamp of 300W was investigated to evaluate the photocatalytic activity of all the samples.SEM images showed that the nano fibers had significant difference morphologies.X-Ray diffraction results indicated that the formation of Fe2TiO5 was much easier than that of CoTiO3,in other words,it was benefit for the formation of CoTiO3 to prolong the annealing time.Magnetic and photocatalytic experiments results indicated that all the samples prepared had magnetic and photocatalytic properties.The method adopted here could support some approaches for the fabrication of many other magnetic photocatalytic materials.