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Citation: XIE Ruyi, ZHANG Linping, XU Hong, ZHONG Yi, SUI Xiaofeng, MAO Zhiping. Preparation of Bi20TiO32/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon[J]. Chinese Journal of Applied Chemistry, ;2017, 34(6): 656-663. doi: 10.11944/j.issn.1000-0518.2017.06.160382 shu

Preparation of Bi20TiO32/Polyacrylonitrile Composite Nanofibers and Their Photocatalytic Activity for Degradation of Isoproturon

  • Key Laboratory of Science and Technology of Eco-textile, Ministry of Education, Donghua University, Shanghai 201620, China

  • Corresponding author: ZHANG Linping, zhang_lp@dhu.edu.cn MAO Zhiping, zhpmao@dhu.edu.cn
  • Received Date: 21 September 2016
    Revised Date: 17 January 2017
    Accepted Date: 17 January 2017

    Fund Project: the National Key Technology Research and Development Program 2014BAC13B02the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry 13W10539

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  • Visible-light responsive photocatalyst Bi20TiO32 was prepared through solvothermal method. To achieve the immobilization of photocatalysts, Bi20TiO32/polyacrylonitrile(PAN) composite nanofibers with different content of Bi20TiO32 were prepared by coaxial electrospinning method. Through this approach, the photocatalysts could be easily recycled, meanwhile, the contact area between photocatalysts and organic pollutants was enhanced during the degradation reaction. The prepared samples were characterized by X-ray diffraction spectra(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), ultraviolet-visible(UV-Vis) diffuse reflectance spectra(UV-Vis DRS) and N2 adsorption-desorption analysis. The photocatalytic activities of Bi20TiO32/PAN composite nanofibers were evaluated by the degradation of isoproturon herbicide under visible-light irradiation. The results show that the prepared Bi20TiO32 photocatalyst with a band gap energy 2.35 eV has a typical visible-light responsive property. The diameters of Bi20TiO32/PAN composite nanofibers are 600~700 nm. Bi20TiO32 is successfully loaded on the surface of nanofibers by this method and the composite materials have obvious visible-light responsibilities. The prepared samples exhibit great photocatalytic activity for degradation of isoproturon. The sample S3 at photocatalyst content 25.7% exhibits the highest removal efficiency of 87%. This research indicates that the photocatalysts immobilized on the organic nanofibers surface can retain their original photocatalytic activity. Coaxial electrospinning technology is a proper approach for the immobilization of photocatalysts.
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