Fabrication and photocatalytic activity of LaFeO3 ribbon‐like nanofibers,Journal of the Chinese Chemical Society

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Fabrication and photocatalytic activity of LaFeO3 ribbon‐like nanofibers
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2019-12-19 , DOI: 10.1002/jccs.201900431
Shudan Li _{1,

2} , Meiling Guo ₁ , Xiuhua Wang ₁ , Kun Gao _{1,

2}

Affiliation

LaFeO₃ ribbon‐like nanofibers were synthesized via a sol–gel‐assisted electrospinning method. The differences in morphology and photocatalytic property of LaFeO₃ nanofibers prepared through different needles were investigated. At the same time, the morphology and photocatalytic activity of porous LaFeO₃ nanobelts formed at different calcination temperatures were also investigated. Scanning electron microscopy results revealed that the obtained ribbon‐like LaFeO₃ nanofibers made using a coaxial needle contained a large number of pores. Moreover, with the increase of calcination temperature, the morphology of the fibers also changed. X‐ray diffraction analysis showed a series of fibers all in orthorhombic LaFeO₃ phase but no other impurities. In addition, the photocatalytic activity of LaFeO₃ nanofibers was studied for the degradation of methylene blue under visible light. The results demonstrated that ribbon‐like nanofibers exhibited excellent photocatalytic activity compared with the others and the LaFeO₃ nanobelts calcined at 500°C had the best photocatalytic activity. Based on the experimental results, possible forming mechanisms involving in LaFeO₃ nanofibers through different needles are also discussed.

中文翻译：

LaFeO3带状纳米纤维的制备及光催化活性

LaFeO ₃带状纳米纤维是通过溶胶-凝胶辅助电纺丝法合成的。研究了不同针刺法制备的LaFeO ₃纳米纤维的形貌和光催化性能的差异。同时，研究了在不同煅烧温度下形成的多孔LaFeO ₃纳米带的形貌和光催化活性。扫描电子显微镜结果表明，使用同轴针制成的带状LaFeO ₃纳米纤维含有大量的孔。而且，随着煅烧温度的升高，纤维的形态也发生了变化。X射线衍射分析表明，一系列纤维均位于正交晶LaFeO _3中相，但没有其他杂质。此外，研究了LaFeO ₃纳米纤维在可见光下对亚甲基蓝降解的光催化活性。结果表明，带状纳米纤维与其他纳米纤维相比具有优异的光催化活性，在500°C下煅烧的LaFeO ₃纳米带具有最佳的光催化活性。基于实验结果，还讨论了可能通过不同的针参与LaFeO ₃纳米纤维的形成机理。

更新日期：2019-12-19

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