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NiO-TiO2同轴纳米纤维的制备及光催化

Preparation and photocatalytic properties of NiO-TiO2 coaxial nanofibers

    摘要
  • 摘要: 以PVP/Ti(OC4H9)4溶胶为壳层, 以PVP/Ni(CH3COO)2·4H2O溶胶为核层, 采用同轴静电纺丝法制备了核壳结构Ti(OC4H9)4/Ni(CH3COO)2·4H2O PVP纤维; 用程序升温法, 在550 ℃下烧结6 h, 制备了NiO-TiO2 同轴纳米纤维。采用X射线衍射(XRD)、 扫描电子显微镜(SEM)、 红外吸收光谱(FTIR)、 热重(TG)等测试技术对复合纳米纤维的结构和性能进行了表征, 并研究了该催化剂在紫外光照射下对亚甲基蓝溶液的催化降解性能。结果表明, NiO-TiO2同轴纳米纤维具有很好的光催化活性, 而且该复合催化剂可以循环使用。

     

    Abstract: Ti(OC4H9)4/Ni(CH3COO)2·4H2O PVP fibers were prepared by coaxial electrospinning using PVP/Ni(CH3COO)2·4H2O sol as the core and PVP/Ti(OC4H9)4 sol as the shell, and then Ti(OC4H9)4/ Ni(CH3COO)2·4H2O PVP fibers were heated at 550 ℃ for 6 h to obtain NiO-TiO2 coaxial nanofibers. The structure and properties of the NiO-TiO2 coaxial fibers were investigated using XRD, SEM, FTIR and TG. The photocatalytic properties of NiO-TiO2 coaxial nanofibers were studied by the degradation of methylene blue under UV irradiation. In comparing with TiO2 nanofibers, the NiO-TiO2 coaxial nanofibers exhibite higher photocatalytic activity for the degradation of methylene blue, and the catalyst could be used repeatedly.

     

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