CNTs/La^(3+)共掺杂TiO_2光催化纳米纤维的形貌及性能研究

Study on morphology and properties of CNTs/La^(3+) doped TiO_2 nanofibers

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%。

Ti O2 nanofibers doped with carbon nanotubes( CNTs) and rare earth La3 +were prepared by electrospinning. And a research was carried on the relation between the relative molecular mass of PAN,the ratio of rare earth La3 +and carbon nanotubes( CNTs),carbonizing temperature and morphology and diameter. The morphology of the nanofiber was scanned by SEM,EDX and also the mechanical property was tested. The results showed that the rare earth and the carbonization had a great effect on the fiber morphology. The conclusion of spinning condition was that the weight average molecular weight of PAN was 60 000. When the content of rare earth La3 +was 0. 05%,the removal proportion of methylene blue had gained 98. 87% after 300 min.