Programmable Structure Control in Cigarlike TiO2 Nanofibers and UV-Light Photocatalysis Performance of Resultant Fabrics

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• 作者：Wenjia Sheng ; Jingxin Zhao ; Zhouli Chen ; Quanlin Ye ; Xuxin Yang ; Keke Huang ; Changmin Hou ; Jichun You ; Yongjin Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：August 3, 2016
• 年：2016
• 卷：55
• 期：30
• 页码：8292-8298
• 全文大小：481K
• 年卷期：0
• ISSN：1520-5045

文摘

Novel cigarlike nanofibers with an outer-shell and inner-continuous-pore structure and resultant fabrics have been fabricated by coupling the self-assembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) containing titanium precursors with the electrospinning technique in our previous work [You et al. ACS Appl. Mater. Interfaces 2013, 5, 2278]. In the current work, the structure control in these nanofibers has been investigated in detail using scanning electron microscopy, focused ion beam, and small angle X-ray scattering. Our results indicate that electrospinning conditions, the adopted solvent, the volume fraction of PS-b-PEO block copolymer, and the amount of titanium tetraisopropoxide in the mixture produce significant effects on both outer-shell and inner-continuous structures in the nanofibers. The parameters discussed above make it possible to achieve programmable structure control in the aspect of the diameter, thickness of the outer shell, and inner continuous pore. As a result, both micropores among fibers and nanopores in certain fibers are under their control. Furthermore, the photocatalytic activity of resultant TiO₂ fabrics was investigated by taking the photodegradation of Rhodamine B as an example. The results suggest that the degradation efficiency and rate constant exhibit sensitivity on the structure of nanofibers.