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通过静电纺丝技术制备了CNTs/La3+共掺杂Ti O2纳米纤维,并详细研究了PAN的相对分子质量、稀土La3+的含量、高温碳化对纳米纤维形貌及直径的影响。通过SEM和EDX对复合纤维的形貌和表面元素进行了观察和分析,并对纳米纤维的力学性能进行了测试。研究表明,稀土含量和高温碳化对纳米纤维的形貌影响较为明显。最后得出:PAN的重均分子量为60 000,纺丝液中稀土La3+相当于Ti的摩尔浓度为0.05%时,纺丝效果较为理想,300 min后对亚甲基蓝的去除率达98.87%。
The CNTs / La3 + co-doped Ti O2 nanofibers were prepared by electrospinning. The relative molecular mass of PAN, the content of rare earth La3 + and the effect of carbonization on the morphology and diameter of nanofibers were investigated in detail. The morphology and surface elements of the composite fibers were observed and analyzed by SEM and EDX. The mechanical properties of the nanofibers were also tested. The results show that the effect of RE content and carbonization on the morphology of nanofibers is obvious. The results showed that the weight average molecular weight of PAN was 60 000 and the molar ratio of rare earth La3 + in spinning solution was 0.05%, the spinning efficiency was better. The removal rate of methylene blue reached 98.87% after 300 min.